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atom.xml
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<?xml version="1.0" encoding="utf-8"?>
<feed xmlns="http://www.w3.org/2005/Atom">
<title>左手写代码，右手写诗</title>
<subtitle>没有付出行动的梦想都是妄想</subtitle>
<link href="/atom.xml" rel="self"/>
<link href="http://www.regularmisu.com/"/>
<updated>2018-03-31T09:29:35.496Z</updated>
<id>http://www.regularmisu.com/</id>
<author>
<name>DouDo</name>
</author>
<generator uri="http://hexo.io/">Hexo</generator>
<entry>
<title>win10系统下使用telnet完成一次简单的HTTP请求</title>
<link href="http://www.regularmisu.com/2018/03/31/win10%E7%B3%BB%E7%BB%9F%E4%B8%8B%E4%BD%BF%E7%94%A8telnet%E5%AE%8C%E6%88%90%E4%B8%80%E6%AC%A1%E7%AE%80%E5%8D%95%E7%9A%84HTTP%E8%AF%B7%E6%B1%82/"/>
<id>http://www.regularmisu.com/2018/03/31/win10系统下使用telnet完成一次简单的HTTP请求/</id>
<published>2018-03-31T09:28:17.000Z</published>
<updated>2018-03-31T09:29:35.496Z</updated>
<content type="html"><![CDATA[<h1 id="开启telnet客户端（若已开启请忽略）"><a href="#开启telnet客户端（若已开启请忽略）" class="headerlink" title="开启telnet客户端（若已开启请忽略）"></a>开启telnet客户端（若已开启请忽略）</h1><p>win10系统下默认telnet客户端是关闭的，需要自己去开启，设置过程简单如下图</p><a id="more"></a><p><img src="https://img-blog.csdn.net/2018033117163170?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L01yX0RvdURv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70" alt="win10打开telnet客户端"></p><h1 id="使用telnet进行简单的HTTP请求"><a href="#使用telnet进行简单的HTTP请求" class="headerlink" title="使用telnet进行简单的HTTP请求"></a>使用telnet进行简单的HTTP请求</h1><p>步骤如下：</p><ul><li>打开cmd,输入： telnet www.baidu.com 80<br>会跳转进入空白的命令行页面。</li><li>输入： <code>Ctrl</code> + <code>]</code>页面会显示<code>欢迎使用 Microsoft Telnet Client</code></li><li>再按一次回车(Enter)键</li><li>进入一个空白页，输入： GET / HTTP/1.0</li><li>按两次回车(Enter)键</li><li>最后返回一次HTTP完整的请求数据，包括请求头，和主体</li></ul>]]></content>
<summary type="html">
<h1 id="开启telnet客户端（若已开启请忽略）"><a href="#开启telnet客户端（若已开启请忽略）" class="headerlink" title="开启telnet客户端（若已开启请忽略）"></a>开启telnet客户端（若已开启请忽略）</h1><p>win10系统下默认telnet客户端是关闭的，需要自己去开启，设置过程简单如下图</p>
</summary>
<category term="Note" scheme="http://www.regularmisu.com/categories/Note/"/>
<category term="HTTP" scheme="http://www.regularmisu.com/tags/HTTP/"/>
</entry>
<entry>
<title>你们都遇到过什么样的室友？</title>
<link href="http://www.regularmisu.com/2018/03/15/%E4%BD%A0%E4%BB%AC%E9%83%BD%E9%81%87%E5%88%B0%E8%BF%87%E4%BB%80%E4%B9%88%E6%A0%B7%E7%9A%84%E5%AE%A4%E5%8F%8B%EF%BC%9F/"/>
<id>http://www.regularmisu.com/2018/03/15/你们都遇到过什么样的室友？/</id>
<published>2018-03-15T13:34:34.000Z</published>
<updated>2018-03-15T16:15:49.013Z</updated>
<content type="html"><![CDATA[<p>生活，就像一杯难咽的酒！一部分人是喝着难咽的酒，却依然微笑着说再来，这种人是英雄，生活再苦再累也勇敢的面对；也有一部分人则是喝一口就不想喝了，这种人面对小困难小无奈就畏畏缩缩。<br>生活里，你有你的苦楚，他有他的无奈。每个人都有自己的路要走，无论是笔直的坎坷路途，还是曲折的狭窄小道。每个人都有自己的事要做，不论是真心实意的喜欢，还是压迫牵强的接受。<br><a id="more"></a></p><h2 id="我不管，我就是想吐槽"><a href="#我不管，我就是想吐槽" class="headerlink" title="我不管，我就是想吐槽"></a>我不管，我就是想吐槽</h2><p>说了这么多废话，主题呢？为什么会说这些所谓的废话呢，那是因为，最近对自己的室友很是无奈。原本出来工作就是奔着好好闯一番的心态来的，知道事业不是那么容易做好的，生活上多多少少都会有些坎坷，没想到，我这2018年来<br>遇到的烦心事全是租房室友身上的事。如果是你，有可能会破口大骂了。这些日子，我实在是忍不下去了，既然跟他们说了不听，那我也不能动武，只能写篇博文吐槽一下，告诫一下，租房时要考虑的问题。<br>这是个什么样的遭遇呢？</p><h2 id="理想中的“爱情公寓”"><a href="#理想中的“爱情公寓”" class="headerlink" title="理想中的“爱情公寓”"></a>理想中的“爱情公寓”</h2><p>去年光棍节，没错，就是光棍节，我这个bachelor搬进了我人生中第4次租的房。刚进来，行李搬到门口，一个男的，过来打招呼，一聊，以后是室友，多多关照，说完还帮我搬行李，再一会儿又来一个女的，说是也住这儿，只是过几<br>天才把行李搬过来。那天，三个人聊的还是蛮开心的，心想又遇到几个不错的室友。心中顿时浮现爱情公寓式的生活，爱情不谈，毕竟人家是有心上人的，只求有一帮聊得来的好朋友，下班后可以一起哈皮。<br><img src="/assets/blogImg/20180315/aqgy.jpg" alt=""></p><h2 id="现实却是如此的“冷漠”"><a href="#现实却是如此的“冷漠”" class="headerlink" title="现实却是如此的“冷漠”"></a>现实却是如此的“冷漠”</h2><p>可时间过去一个多月了，渐渐的发现跟想象中的完全不一样啊。一个套间里四个卧室，一个卫生间，一个小厨房，客厅已经不能算是客厅了，有一间卧室是被后来隔出来做成的卧室，客厅基本上是一天二十四小时都是乌漆嘛黑的。一<br>开始找房子的时候，感觉亮堂完全是因为所有的卧室门都开着才会那么亮的。住进来之后，就一开始见面还聊聊，开个门啥的，过一段时间，一个个的见面都不打招呼，见面给你们个微笑，一个个跟没见到似的，顶多点个头，想想就<br>觉得冷漠，让人哆嗦。</p><h2 id="所谓的“爱干净爱整洁”"><a href="#所谓的“爱干净爱整洁”" class="headerlink" title="所谓的“爱干净爱整洁”"></a>所谓的“爱干净爱整洁”</h2><p>隔壁大姐，刚刚进来时跟我说，她有点洁癖，喜欢干净，让我们每次洗完澡，把地拖一拖，（这个拖把是我出资一起买的），刚开始，这个拖把还放在卫生间门口，每次洗完澡我也会拖下地，其实也就地上稍微有点水，哪儿有洗澡地上<br>没点水的哦。后来我发现拖把不见了，我还以为被打扫的阿姨拿走了，我也没问多少，结果再过一段时间，它竟然又神奇的出现在了卫生间门口，我还以为阿姨又放回来了，偶然的一次，发现拖把被隔壁大姐藏在卧室，问她干嘛放自己<br>卧室，她说怕我们把拖把弄脏。当时我就觉得搞笑，拖把拖地的，你还想要多干净，还藏卧室，不知道咋想的。每次洗澡的时候都会发现地上一大堆隔壁大姐掉的长长的头发，这些头发后来还堵塞了下水道，公寓管家喊来下水道师傅来<br>通水道，在微信群里通知我们通完之后要收25块钱，她就一下次在群里跳出来责备下水道设计的不合理，说了一大堆不是，还说到，卫生间垃圾桶满了都是她倒的，我当时就无语了，这个卫生间，她用的是最多的，里面的纸篓，我们其<br>他人加起来都没她一个人用的多，争这种小事，我当然不予理睬了，在一旁看着笑笑罢了，本来我都准备交我该交的那份钱了，看得出来当时管家应该很尴尬，最后管家说自己跟领导申请免去这次了，至于真假都不知道，25块钱也不知<br>道是不是她自己贴的。<br>是爱干净，每次隔壁大姐用完卫生间会拖地，可是不知道开门透气的吗？我把卫生间门开下来透气，每次都被你关上，只开个里面的窗户，你上哪儿去透气啊，搞得卫生间臭气熏天，早上进去洗脸刷牙差点被熏得晕倒。<br><img src="/assets/blogImg/20180315/wunai.jpg" alt=""></p><h2 id="热水问题"><a href="#热水问题" class="headerlink" title="热水问题"></a>热水问题</h2><p>17年底，18年初的时候，四间卧室住满了人，冬天了，热水器热水供应不足，隔壁女的说，以后分开洗，每人两天洗一次，有一哥们儿还好，在健身房上班，晚上基本洗完澡回来，<br>剩下我们两个男的一个女的了，想着女的洗澡用水多，让着点。我6点下班，有时候高兴就在公司多待会儿，等到七点多再回来，刚好差不多第一批该洗澡的人洗好了，我回来刚好可以洗澡了。起初，我发现回来的时候，热水器的指针<br>都是在冷水那块儿，根本没有热水，觉得可能是因为她们哪个刚刚洗完澡吧，我再等会儿去洗澡。时间久了，发现不对劲啊，怎么每天都这样，隔壁男的几乎没怎么看到他开门去洗澡，大部分都是另一边的大姐去卫生间在用，经过一<br>段时间观察，果然，她每天都用一大部分热水，不管是洗澡还是洗脸，甚至还有一个很大很大的桶，专门泡脚的桶，一装差不多能装个热水器的四分之一的热水，加上其他地方摸摸搞搞的，真的很好奇她是怎么用的。<br>过了个农历年，新年新气象，我提前一天来，路上堵了一下午的车，流了不少汗，准备回来赶紧洗个澡的，晚点还要去朋友那儿。来了发现隔壁大姐还在，毕竟新年，上来我还敲门祝福新年快乐，然后我跟她说我要洗个澡，待会儿还要<br>出去，然后她端了一盆衣服进卫生间洗衣服。等我行李放下后进卫生间脱了衣服准备洗澡，结果发现热水被用的一点不剩，呵呵，我终于知道为什么热水不够用了，洗澡，泡脚，洗衣服全是用的热水，更可怕的是，一热水器的热水全用<br>来洗衣服了。这下真的彻底无语了。当时真的想敲她门，拎出来好好谈谈这公共区域的问题。由于刚刚过年，想想就算了。</p><h2 id="厨房问题"><a href="#厨房问题" class="headerlink" title="厨房问题"></a>厨房问题</h2><p>在健身房上班的哥们儿，住着我们这儿最“豪华”的一间，也是第一个搬进来的，每天晚上10点之后下班回来却只是吃着煮的方便面，我是想不通，也许他觉得方便面比什么都好吃。你吃就吃吧，煮完面的锅从来不洗，每次都是第二天<br>准备煮的时候再洗，日积月累的，洗碗池里全是方便面的剩渣，厨房全是一股方便面的味道。本来我还打算自己买套厨具，好好学学做菜，看这样，也放弃了。<br><img src="/assets/blogImg/20180315/juewang.jpg" alt=""></p><h2 id="一些其他问题"><a href="#一些其他问题" class="headerlink" title="一些其他问题"></a>一些其他问题</h2><p>比如，大半夜的起身去解手关门声超大，快睡着了都能被吵醒。隔壁大姐每次进卫生间，一进就是差不多半个小时，而且很喜欢进卫生间。住房也有问题，热水器前几天刚刚坏，他们发现了竟然不报修。房租不便宜，购买的家电却是劣<br>质货，这样的公寓，别人问起来我也不会推荐，自己更是不会再选择了。<br>问题真的很多，都很奇葩，都不想说了。</p><h2 id="提醒了依旧这样"><a href="#提醒了依旧这样" class="headerlink" title="提醒了依旧这样"></a>提醒了依旧这样</h2><p>提醒了，依旧这样，我都不知道怎么才能让他们稍微在意下别人的感受，真的不想把事情搞大，不知道有没有人也有过这样的遭遇。</p><h2 id="没有对比就没有伤害"><a href="#没有对比就没有伤害" class="headerlink" title="没有对比就没有伤害"></a>没有对比就没有伤害</h2><p>对比之前的室友和现在的室友，真的很怀念啊！曾经，我的生活是这样的，下班回来和室友一起聊天，一起吃饭，一起玩游戏开黑，一起出去看电影，一起去游乐场玩。再看看现在，唉！<br>遇到好的室友，且行且珍惜。</p><h2 id="生活这杯酒"><a href="#生活这杯酒" class="headerlink" title="生活这杯酒"></a>生活这杯酒</h2><p>属于你的这杯酒，哭着也得喝下去。不过，想着其他开心的人和事，这些都不算什么了，不行就搬走呗。</p><p><br></p><p>毕业快有两年了，好多出来工作的人肯定都有过类似找个什么样的租房？房租要多少租金自己能接受，如果与人合租，室友会不会很坑？等等一些扰人的想法。或许你就在家附近工作不必考虑这些，又或许你已经在某个地方拥有了一<br>套属于自己的房子。但是，我毕业出来之后，发现，绝大部分人都是些异地打拼。以后啊，找房子，得提前一个多月就开始找，好的房源大都在中介手里，但是我相信只要自己花点心思，也能找到，找房子的时候各方面得多考虑考虑，个人<br>要求不同，根据自己的想法来，男生最好还是跟男生一起住，若果想碰运气把妹的话，那就另当别论了；女生最好还是跟女生一起，只有女的能理解女的。凡事多谦让点，不让自己吃亏的前提下也要多为别人考虑考虑，很有可能你以后<br>会感谢现在你所做到的与人和睦，他们可能会成为你今后的挚友，也可以是你人生路上的导师，总之一切皆有可能。我现在就是，当初相处的很好的室友现在给予了我莫大的帮助，真的很感谢当时的自己有好好珍惜这些室友。<br><br><br>还是那句：且行且珍惜，与人方便就是自己方便，与人帮助就是帮助自己。<br><br><br><br><br><img src="/assets/blogImg/20180315/Java.jpg" alt=""><br>我这儿有故事也有酒，有空来听听！</p>]]></content>
<summary type="html">
<p>生活，就像一杯难咽的酒！一部分人是喝着难咽的酒，却依然微笑着说再来，这种人是英雄，生活再苦再累也勇敢的面对；也有一部分人则是喝一口就不想喝了，这种人面对小困难小无奈就畏畏缩缩。<br>生活里，你有你的苦楚，他有他的无奈。每个人都有自己的路要走，无论是笔直的坎坷路途，还是曲折的狭窄小道。每个人都有自己的事要做，不论是真心实意的喜欢，还是压迫牵强的接受。<br>
</summary>
<category term="Essay" scheme="http://www.regularmisu.com/categories/Essay/"/>
<category term="生活" scheme="http://www.regularmisu.com/tags/%E7%94%9F%E6%B4%BB/"/>
</entry>
<entry>
<title>javascript中 typeof 和 instanceof区别</title>
<link href="http://www.regularmisu.com/2018/03/15/javascript%E4%B8%AD-typeof-%E5%92%8C-instanceof%E5%8C%BA%E5%88%AB/"/>
<id>http://www.regularmisu.com/2018/03/15/javascript中-typeof-和-instanceof区别/</id>
<published>2018-03-15T13:08:03.000Z</published>
<updated>2018-03-15T13:13:39.423Z</updated>
<content type="html"><![CDATA[<h3 id="typeof"><a href="#typeof" class="headerlink" title="typeof()"></a>typeof()</h3><p>用来获取一个变量或者表达式的类型，typeof返回如下几个结果：</p><pre><code>numberbooleanstringfunction（函数）object（NULL,数组，对象）undefined</code></pre><a id="more"></a><p>例如：<br><figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> a = <span class="number">12</span>;</span><br><span class="line"><span class="built_in">console</span>.log(<span class="keyword">typeof</span>(a));</span><br></pre></td></tr></table></figure></p><p>显示结果为 <code>number</code></p><h3 id="instanceof"><a href="#instanceof" class="headerlink" title="instanceof"></a>instanceof</h3><p>常用来判断一个变量是否是某个对象的实例,返回结果是boolean值(<code>true</code> / <code>false</code>)<br>例如：<br><figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">People</span>(<span class="params"></span>)</span>{</span><br><span class="line">}</span><br><span class="line"><span class="keyword">var</span> student = <span class="keyword">new</span> People();</span><br><span class="line"><span class="built_in">console</span>.log(student <span class="keyword">instanceof</span> People);</span><br></pre></td></tr></table></figure></p><p>返回结果为<code>true</code></p>]]></content>
<summary type="html">
<h3 id="typeof"><a href="#typeof" class="headerlink" title="typeof()"></a>typeof()</h3><p>用来获取一个变量或者表达式的类型，typeof返回如下几个结果：</p>
<pre><code>number
boolean
string
function（函数）
object（NULL,数组，对象）
undefined
</code></pre>
</summary>
<category term="Note" scheme="http://www.regularmisu.com/categories/Note/"/>
<category term="js" scheme="http://www.regularmisu.com/tags/js/"/>
</entry>
<entry>
<title>git基本使用</title>
<link href="http://www.regularmisu.com/2018/03/06/git%E5%9F%BA%E6%9C%AC%E4%BD%BF%E7%94%A8/"/>
<id>http://www.regularmisu.com/2018/03/06/git基本使用/</id>
<published>2018-03-06T06:12:46.000Z</published>
<updated>2018-03-06T06:44:08.760Z</updated>
<content type="html"><![CDATA[<h2 id="一、git工作流程"><a href="#一、git工作流程" class="headerlink" title="一、git工作流程"></a>一、git工作流程</h2><p>工作流程：</p><pre><code>1. 克隆远程资源库中项目代码到本地（本地会生成.git隐藏文件和项目代码，项目代码为工作区）2. 对工作区代码进行添加，修改，删除一系列编辑操作3. add 代码到暂存区（index）4. 如果远程资源库代码有其他人提交新的版本，则需要拉取并合并到本地代码5. 查看合并代码是否有冲突，若有冲突，修改之后，再一次 add 到暂存区6. commit 代码到本地仓库7. push 代码到远程资源库</code></pre><a id="more"></a><p>我将工作流程简单的绘制成一幅图，由图可清晰看出以一系列的操作步骤<br><img src="/assets/blogImg/180306/git基本操作.png" alt="git基本操作"></p><blockquote><p>附上：<a href="http://www.bootcss.com/p/git-guide/" target="_blank" rel="noopener">git使用简易指南</a></p></blockquote><h2 id="二、git常用命令"><a href="#二、git常用命令" class="headerlink" title="二、git常用命令"></a>二、git常用命令</h2><h3 id="从远端拉取并合并代码到本地仓库"><a href="#从远端拉取并合并代码到本地仓库" class="headerlink" title="从远端拉取并合并代码到本地仓库"></a>从远端拉取并合并代码到本地仓库</h3><figure class="highlight ebnf"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="attribute">git pull</span></span><br></pre></td></tr></table></figure><h3 id="将修改过的代码生成快照添加到暂存区"><a href="#将修改过的代码生成快照添加到暂存区" class="headerlink" title="将修改过的代码生成快照添加到暂存区"></a>将修改过的代码生成快照添加到暂存区</h3><figure class="highlight dockerfile"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">git <span class="keyword">add</span><span class="bash"> * 或 <filename></span></span><br></pre></td></tr></table></figure><h3 id="将代码提交到本地仓库"><a href="#将代码提交到本地仓库" class="headerlink" title="将代码提交到本地仓库"></a>将代码提交到本地仓库</h3><figure class="highlight 1c"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">git commit -m <span class="string">"..."</span> <span class="comment">//双引号内为：注释，代码修改信息摘要</span></span><br></pre></td></tr></table></figure><h3 id="提交代码到远程资源库"><a href="#提交代码到远程资源库" class="headerlink" title="提交代码到远程资源库"></a>提交代码到远程资源库</h3><figure class="highlight crmsh"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">git push origin <span class="keyword">master</span> <span class="title">//master</span>可以换成其他分支名</span><br></pre></td></tr></table></figure><h3 id="设置git的user-name-和Email"><a href="#设置git的user-name-和Email" class="headerlink" title="设置git的user name 和Email"></a>设置git的user name 和Email</h3><figure class="highlight stylus"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">git config --global user<span class="selector-class">.name</span> <span class="string">"username"</span> <span class="comment">//username为远程资源库账号名</span></span><br><span class="line">git config --global user<span class="selector-class">.email</span> <span class="string">"user@gmail.com"</span> <span class="comment">//user@gmail.com为远程资源库注册邮箱</span></span><br></pre></td></tr></table></figure><h3 id="克隆已有的远程资源库代码到本地"><a href="#克隆已有的远程资源库代码到本地" class="headerlink" title="克隆已有的远程资源库代码到本地"></a>克隆已有的远程资源库代码到本地</h3><p>1.https:// 协议<br><figure class="highlight crmsh"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">git <span class="keyword">clone</span> <span class="title">https</span>://github.com/username/demo</span><br></pre></td></tr></table></figure></p><p>2.ssh:// 协议<br><figure class="highlight crmsh"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">git <span class="keyword">clone</span> <span class="title">git</span>@github.com:username/demo.git</span><br></pre></td></tr></table></figure></p><h3 id="本地创建文件"><a href="#本地创建文件" class="headerlink" title="本地创建文件"></a>本地创建文件</h3><figure class="highlight ebnf"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="attribute">git touch filename</span></span><br></pre></td></tr></table></figure><h3 id="使用当前目录为git仓库"><a href="#使用当前目录为git仓库" class="headerlink" title="使用当前目录为git仓库"></a>使用当前目录为git仓库</h3><figure class="highlight swift"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">git <span class="keyword">init</span> <span class="comment">//后面可加上指定目录作为本地git仓库</span></span><br></pre></td></tr></table></figure><p>执行后，会在当前目录或指定的目录创建隐藏的<code>.git</code>文件</p><h3 id="查看状态"><a href="#查看状态" class="headerlink" title="查看状态"></a>查看状态</h3><figure class="highlight 1c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">git status <span class="comment">//查看状态完整信息</span></span><br><span class="line">或者</span><br><span class="line">git status -s <span class="comment">//查看简短的状态信息</span></span><br></pre></td></tr></table></figure><h3 id="查看提交历史"><a href="#查看提交历史" class="headerlink" title="查看提交历史"></a>查看提交历史</h3><figure class="highlight 1c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">git <span class="built_in">log</span> <span class="comment">//查看详细的提交历史</span></span><br><span class="line">或者</span><br><span class="line">git <span class="built_in">log</span> --online <span class="comment">//查看提交历史的简洁版</span></span><br></pre></td></tr></table></figure><h3 id="比较改动"><a href="#比较改动" class="headerlink" title="比较改动"></a>比较改动</h3><p>工作目录暂存区比较<br><figure class="highlight ebnf"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="attribute">git diff</span></span><br></pre></td></tr></table></figure></p><p>已暂存将要提交的内容（add后准备commit的内容）<br><figure class="highlight ebnf"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="attribute">git diff cached</span></span><br></pre></td></tr></table></figure></p><h3 id="移除和移动"><a href="#移除和移动" class="headerlink" title="移除和移动"></a>移除和移动</h3><p>移除（工作区移除，暂存区移除）<br><figure class="highlight stata"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">//工作目录移除</span></span><br><span class="line"><span class="keyword">rm</span> filename</span><br><span class="line"><span class="comment">//暂存区移除</span></span><br><span class="line">git <span class="keyword">rm</span> filename</span><br></pre></td></tr></table></figure></p><p>移动（实现重命名）<br><figure class="highlight cos"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">git <span class="keyword">mv</span> filename <span class="comment">//待修改的文件</span></span><br></pre></td></tr></table></figure></p><h3 id="git分支管理"><a href="#git分支管理" class="headerlink" title="git分支管理"></a>git分支管理</h3><p>1.列出分支<br><figure class="highlight ebnf"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="attribute">git branch</span></span><br></pre></td></tr></table></figure></p><p>2.手动创建一支分支<br><figure class="highlight armasm"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="symbol">git</span> <span class="keyword">branch </span><span class="keyword">branchname </span>// <span class="keyword">branchname为分支名</span></span><br></pre></td></tr></table></figure></p><p>3.切换分支<br><figure class="highlight 1c"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">git checkout branchname <span class="comment">// 切换到分支名为branchname的分支</span></span><br></pre></td></tr></table></figure></p><p>4.手动创建分支并立即切换到该分支下<br><figure class="highlight armasm"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="symbol">git</span> checkout -<span class="keyword">b </span><span class="keyword">branchname </span>// 手动创建一个名为<span class="keyword">branchname </span>的分支并立即切换到该分支下</span><br></pre></td></tr></table></figure></p><p>5.删除分支<br><figure class="highlight armasm"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="symbol">git</span> <span class="keyword">branch </span>-d <span class="keyword">branchname </span>// 删除<span class="keyword">branchname分支</span></span><br></pre></td></tr></table></figure></p><p>6.合并分支<br><figure class="highlight cos"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">git <span class="keyword">merge</span> branchname <span class="comment">// 将branchname分支合并到当前分支</span></span><br></pre></td></tr></table></figure></p><h2 id="三、异常"><a href="#三、异常" class="headerlink" title="三、异常"></a>三、异常</h2><p>出现以下异常：<br><figure class="highlight subunit"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">remote: Counting objects: 86, done.</span><br><span class="line">remote: Compressing objects: 100% (82/82), done.</span><br><span class="line"><span class="keyword">error: </span>RPC failed; curl 18 transfer closed with outstanding read data remaining</span><br><span class="line">fatal: The remote end hung up unexpectedly</span><br><span class="line">fatal: early EOF</span><br><span class="line">fatal: unpack-objects failed</span><br></pre></td></tr></table></figure></p><p>执行如下操作<br><figure class="highlight routeros"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">git<span class="built_in"> config </span>--global http.postBuffer 524288000</span><br></pre></td></tr></table></figure></p><p>执行之后可能需要过一会儿才可以恢复正常使用</p>]]></content>
<summary type="html">
<h2 id="一、git工作流程"><a href="#一、git工作流程" class="headerlink" title="一、git工作流程"></a>一、git工作流程</h2><p>工作流程：</p>
<pre><code>1. 克隆远程资源库中项目代码到本地（本地会生成.git隐藏文件和项目代码，项目代码为工作区）
2. 对工作区代码进行添加，修改，删除一系列编辑操作
3. add 代码到暂存区（index）
4. 如果远程资源库代码有其他人提交新的版本，则需要拉取并合并到本地代码
5. 查看合并代码是否有冲突，若有冲突，修改之后，再一次 add 到暂存区
6. commit 代码到本地仓库
7. push 代码到远程资源库
</code></pre>
</summary>
<category term="Note" scheme="http://www.regularmisu.com/categories/Note/"/>
<category term="git" scheme="http://www.regularmisu.com/tags/git/"/>
</entry>
<entry>
<title>Spring boot+Thymeleaf+spring-data-jpa简单项目搭建</title>
<link href="http://www.regularmisu.com/2018/02/28/Spring-boot+Thymeleaf+spring-data-jpa%E7%AE%80%E5%8D%95%E9%A1%B9%E7%9B%AE%E6%90%AD%E5%BB%BA/"/>
<id>http://www.regularmisu.com/2018/02/28/Spring-boot+Thymeleaf+spring-data-jpa简单项目搭建/</id>
<published>2018-02-28T09:11:34.000Z</published>
<updated>2018-02-28T09:34:03.406Z</updated>
<content type="html"><![CDATA[<blockquote><p>笔记整理</p></blockquote><ul><li>Spring Boot搭建简单项目，容易上手，无需手动配置繁杂的xml文件,copy大量的重复配置代码。</li><li>Thymeleaf模板引擎渲染web视图，可完全替代JSP，使用Thymeleaf的主要目标在于提供一种可被浏览器正确显示的、格式良好的模板创建方式，（即创建 .html文件可被浏览器直接浏览）因此也可以用作静态建模。</li><li>spring-data-jpa可简化数据访问，减少大量sql语句，尤其是基本的增删改查</li></ul><a id="more"></a><blockquote><p>搭建环境：eclipse、java 1.8.0_111 、spring boot 1.5.10</p></blockquote><h2 id="一、创建项目"><a href="#一、创建项目" class="headerlink" title="一、创建项目"></a>一、创建项目</h2><h3 id="1-第一步"><a href="#1-第一步" class="headerlink" title="1. 第一步"></a>1. 第一步</h3><p><img src="/assets/blogImg/180228/1.png" alt="第一步"><br>配置选好及相关信息填好后进行下一步</p><h3 id="2-第二步"><a href="#2-第二步" class="headerlink" title="2. 第二步"></a>2. 第二步</h3><p><img src="/assets/blogImg/180228/2.png" alt="第二步"><br>这一步是选择所需要添加的依赖，这边既然是<code>spring boot</code> 整合<code>thymeleaf</code> 和 <code>Jpa</code> 搭建的web项目，勾选途中相关的库选项即可，然后点击 Next -> Finish。<br>之后eclipse便会自动下载相关的依赖jar包，期间可能需要等一会儿。若是上一步有少勾选的，也可在建好的项目中的<code>pom.xml</code>文件中手动添加依赖<br>此处相关依赖有：<br><figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag"><<span class="name">dependency</span>></span></span><br><span class="line"><span class="tag"><<span class="name">groupId</span>></span>org.springframework.boot<span class="tag"></<span class="name">groupId</span>></span></span><br><span class="line"><span class="tag"><<span class="name">artifactId</span>></span>spring-boot-starter-data-jpa<span class="tag"></<span class="name">artifactId</span>></span></span><br><span class="line"><span class="tag"></<span class="name">dependency</span>></span></span><br><span class="line"><span class="tag"><<span class="name">dependency</span>></span></span><br><span class="line"><span class="tag"><<span class="name">groupId</span>></span>org.springframework.boot<span class="tag"></<span class="name">groupId</span>></span></span><br><span class="line"><span class="tag"><<span class="name">artifactId</span>></span>spring-boot-starter-thymeleaf<span class="tag"></<span class="name">artifactId</span>></span></span><br><span class="line"><span class="tag"></<span class="name">dependency</span>></span></span><br><span class="line"><span class="tag"><<span class="name">dependency</span>></span></span><br><span class="line"><span class="tag"><<span class="name">groupId</span>></span>org.springframework.boot<span class="tag"></<span class="name">groupId</span>></span></span><br><span class="line"><span class="tag"><<span class="name">artifactId</span>></span>spring-boot-starter-web<span class="tag"></<span class="name">artifactId</span>></span></span><br><span class="line"><span class="tag"></<span class="name">dependency</span>></span></span><br></pre></td></tr></table></figure></p><p>创建好后，项目基础框架如下图：<br><img src="/assets/blogImg/180228/3.png" alt="初始项目框架"><br>此时，项目已经可以运行，<br>spring boot 默认提供静态资源的位置为：<code>src/main/resources/static</code><br>而模板放在：<code>src/main/resources/templates</code>下</p><blockquote><p>注： Java代码均要写在DemoApplication.java的同级包中或子包中</p></blockquote><h3 id="3-配置application-properties文件"><a href="#3-配置application-properties文件" class="headerlink" title="3.配置application.properties文件"></a>3.配置application.properties文件</h3><h4 id="3-1-基本配置："><a href="#3-1-基本配置：" class="headerlink" title="3.1 基本配置："></a>3.1 基本配置：</h4><pre><code>- spring.datasource.driver-class-name= # 数据源驱动- spring.datasource.url= # 数据源- spring.datasource.username= # 数据库用户名- spring.datasource.password= # 数据库密码</code></pre><blockquote><p>配置到这儿，已经可以运行简单项目了。</p><h4 id="3-2-其他配置"><a href="#3-2-其他配置" class="headerlink" title="3.2 其他配置"></a>3.2 其他配置</h4><h5 id="3-2-1-模板引擎配置"><a href="#3-2-1-模板引擎配置" class="headerlink" title="3.2.1 模板引擎配置"></a>3.2.1 模板引擎配置</h5><p>若thymeleaf对不严格的HTML标签解析出错时，需要添加：</p></blockquote><pre><code>spring.thymeleaf.mode=LEGACYHTML5</code></pre><p>非严格的thymeleaf格式 你可能会发现在默认配置下，thymeleaf对html文件内容要求很严格，比如<code><meta charset="UTF-8" /></code>， 如果少最后的标签封闭符号/，运行项目访问当前页面时就会报如下异常：<br><figure class="highlight stylus"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">org<span class="selector-class">.xml</span><span class="selector-class">.sax</span><span class="selector-class">.SAXParseException</span>: 元素类型 <span class="string">"meta"</span> 必须由匹配的结束标记 <span class="string">"</meta>"</span> 终止。</span><br><span class="line">at com<span class="selector-class">.sun</span><span class="selector-class">.org</span><span class="selector-class">.apache</span><span class="selector-class">.xerces</span><span class="selector-class">.internal</span><span class="selector-class">.util</span><span class="selector-class">.ErrorHandlerWrapper</span><span class="selector-class">.createSAXParseException</span>(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at com<span class="selector-class">.sun</span><span class="selector-class">.org</span><span class="selector-class">.apache</span><span class="selector-class">.xerces</span><span class="selector-class">.internal</span><span class="selector-class">.util</span><span class="selector-class">.ErrorHandlerWrapper</span><span class="selector-class">.fatalError</span>(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at com<span class="selector-class">.sun</span><span class="selector-class">.org</span><span class="selector-class">.apache</span><span class="selector-class">.xerces</span><span class="selector-class">.internal</span><span class="selector-class">.impl</span><span class="selector-class">.XMLErrorReporter</span><span class="selector-class">.reportError</span>(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at com<span class="selector-class">.sun</span><span class="selector-class">.org</span><span class="selector-class">.apache</span><span class="selector-class">.xerces</span><span class="selector-class">.internal</span><span class="selector-class">.impl</span><span class="selector-class">.XMLErrorReporter</span><span class="selector-class">.reportError</span>(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at com<span class="selector-class">.sun</span><span class="selector-class">.org</span><span class="selector-class">.apache</span><span class="selector-class">.xerces</span><span class="selector-class">.internal</span><span class="selector-class">.impl</span><span class="selector-class">.XMLScanner</span><span class="selector-class">.reportFatalError</span>(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">...</span><br></pre></td></tr></table></figure></p><p>因此，application.properties配置文件中建议增加下面这段：</p><pre><code>spring.thymeleaf.mode=LEGACYHTML5 </code></pre><p><code>spring.thymeleaf.mode</code>的默认值是<code>HTML5</code>，其实是一个很严格的检查，改为<code>LEGACYHTML5</code>可以得到一个可能更友好亲切的格式要求。需要注意的是，<code>LEGACYHTML5</code>需要搭配一个额外的库<code>NekoHTML</code>才可用。<br>因此，需要引入相关依赖：<br><figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag"><<span class="name">dependency</span>></span></span><br><span class="line"><span class="tag"><<span class="name">groupId</span>></span>net.sourceforge.nekohtml<span class="tag"></<span class="name">groupId</span>></span></span><br><span class="line"><span class="tag"><<span class="name">artifactId</span>></span>nekohtml<span class="tag"></<span class="name">artifactId</span>></span></span><br><span class="line"><span class="tag"></<span class="name">dependency</span>></span></span><br></pre></td></tr></table></figure></p><p>此外,thymeleaf的其他配置默认如下：<br><figure class="highlight routeros"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment"># 是否关闭thymeleaf缓存，关闭后，在开发过程中修改html文件后会立即生效，不需要重新启动spring boot项目</span></span><br><span class="line">spring.thymeleaf.<span class="attribute">cache</span>=<span class="literal">true</span></span><br><span class="line"><span class="comment"># 检查模板位置是否存在</span></span><br><span class="line">spring.thymeleaf.<span class="attribute">check-template-location</span>=<span class="literal">true</span></span><br><span class="line"><span class="comment"># 支持的文本类型</span></span><br><span class="line">spring.thymeleaf.<span class="attribute">content-type</span>=text/html</span><br><span class="line"><span class="comment"># 是否启用MVC视图解析</span></span><br><span class="line">spring.thymeleaf.<span class="attribute">enabled</span>=<span class="literal">true</span></span><br><span class="line"><span class="comment"># 模板使用的编码</span></span><br><span class="line">spring.thymeleaf.<span class="attribute">encoding</span>=UTF-8</span><br><span class="line"><span class="comment"># 指定名称的模板文件排除解析队列，名称用","隔开</span></span><br><span class="line">spring.thymeleaf.excluded-view-names=</span><br><span class="line"><span class="comment"># 默认模板配置路径，templates后的"/"不能少</span></span><br><span class="line">spring.thymeleaf.<span class="attribute">prefix</span>=classpath:/templates/</span><br><span class="line"><span class="comment"># 默认模板的后缀</span></span><br><span class="line">spring.thymeleaf.<span class="attribute">suffix</span>=.html </span><br><span class="line"><span class="comment"># Order of the template resolver in the chain.</span></span><br><span class="line">spring.thymeleaf.template-resolver-order=</span><br><span class="line"><span class="comment"># 指定名称的模板文件才可被解析，名称用","隔开</span></span><br><span class="line">spring.thymeleaf.view-names=</span><br></pre></td></tr></table></figure></p><h5 id="3-2-2-Jpa主要配置"><a href="#3-2-2-Jpa主要配置" class="headerlink" title="3.2.2 Jpa主要配置"></a>3.2.2 Jpa主要配置</h5><p>添加配置：</p><pre><code>spring.jpa.properties.hibernate.hbm2ddl.auto=update</code></pre><p>此配置是hibernate的配置属性，其主要作用是：自动创建、更新、验证数据库表结构。该参数的几种配置如下： </p><ul><li><code>create</code>：每次加载hibernate时都会删除上一次的生成的表，然后根据你的model类再重新来生成新表，哪怕两次没有任何改变也要这样执行，这就是导致数据库表数据丢失的一个重要原因。</li><li><code>create-drop</code>：每次加载hibernate时根据model类生成表，但是sessionFactory一关闭,表就自动删除。</li><li><code>update</code>：最常用的属性，第一次加载hibernate时根据model类会自动建立起表的结构（前提是先建立好数据库），以后加载hibernate时根据model类自动更新表结构，即使表结构改变了但表中的行仍然存在不会删除以前的行。要注意的是当部署到服务器后，表结构是不会被马上建立起来的，是要等应用第一次运行起来后才会。</li><li><code>validate</code>：每次加载hibernate时，验证创建数据库表结构，只会和数据库中的表进行比较，不会创建新表，但是会插入新值。</li></ul><p>此外，可添加：</p><pre><code>spring.jpa.show-sql = true</code></pre><p>用来运行项目时可以在控制台输出jpa转化的具体的sql语句，方便查看和测试</p><blockquote><p>到目前为止，基本配置文件完成，可以开始建立项目</p></blockquote><h2 id="二、项目启动运行"><a href="#二、项目启动运行" class="headerlink" title="二、项目启动运行"></a>二、项目启动运行</h2><p>由于spring boot默认使用Tomcat作为web服务器，只需引入上述依赖中的<code>spring-boot-starter-web</code>便是可，这使得搭建一个web项目变得更加简单，项目创建好后，只需启动<code>XxxApplication.java</code>文件的main方法即可。此处启动的是<code>DemoApplication.java</code>中的main方法 </p><h2 id="三、-MVC模式下项目搭建"><a href="#三、-MVC模式下项目搭建" class="headerlink" title="三、 MVC模式下项目搭建"></a>三、 MVC模式下项目搭建</h2><h3 id="1-model类"><a href="#1-model类" class="headerlink" title="1. model类"></a>1. model类</h3><p>model类创建需要使用相关jpa注解，常用注解可参考<a href="http://www.regularmisu.com/2018/02/24/spring-data-jpa%E5%B8%B8%E7%94%A8%E6%B3%A8%E8%A7%A3/">链接</a><br><figure class="highlight kotlin"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> javax.persistence.Column;</span><br><span class="line"><span class="keyword">import</span> javax.persistence.Entity;</span><br><span class="line"><span class="keyword">import</span> javax.persistence.GeneratedValue;</span><br><span class="line"><span class="keyword">import</span> javax.persistence.Id;</span><br><span class="line"></span><br><span class="line"><span class="meta">@Entity</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">User</span> </span>{</span><br><span class="line"> <span class="meta">@Id</span></span><br><span class="line"> <span class="meta">@GeneratedValue</span></span><br><span class="line"> <span class="keyword">private</span> <span class="built_in">Long</span> id;</span><br><span class="line"></span><br><span class="line"> <span class="meta">@Column(nullable = false)</span></span><br><span class="line"> <span class="keyword">private</span> String name;</span><br><span class="line"></span><br><span class="line"> <span class="meta">@Column(length = 10)</span></span><br><span class="line"> <span class="keyword">private</span> Integer age;</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> User(String name, Integer age) {</span><br><span class="line"><span class="keyword">this</span>.name = name;</span><br><span class="line"><span class="keyword">this</span>.age = age;</span><br><span class="line">}</span><br><span class="line"><span class="comment">//省略get、set方法</span></span><br><span class="line">}</span><br></pre></td></tr></table></figure></p><p>在上述配置下，此时运行项目，数据库便会自动创建User表：<br><img src="/assets/blogImg/180228/4.png" alt="Jpa生成的数据库表"></p><h3 id="2-数据访问接口-仓储层"><a href="#2-数据访问接口-仓储层" class="headerlink" title="2.数据访问接口(仓储层)"></a>2.数据访问接口(仓储层)</h3><p>User类的对应数据访问接口<br><figure class="highlight routeros"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">import org.springframework.data.jpa.repository.JpaRepository;</span><br><span class="line">import com.ziv.model.User;</span><br><span class="line"></span><br><span class="line">public<span class="built_in"> interface </span>UserRepository extends JpaRepository<User, Long> {</span><br><span class="line"></span><br><span class="line">}</span><br></pre></td></tr></table></figure></p><p>此接口需要继承<code>JpaRepository</code>接口，并修改泛型，第一个为对应model类的类名(此处为<code>User</code>)，第二个为对应model类的主键的类型(此处为<code>Long</code>)</p><h3 id="3-Controller-控制层"><a href="#3-Controller-控制层" class="headerlink" title="3.Controller(控制层)"></a>3.Controller(控制层)</h3><h4 id="3-1-Controller基础注解"><a href="#3-1-Controller基础注解" class="headerlink" title="3.1 Controller基础注解"></a>3.1 Controller基础注解</h4><ul><li>@Controller: 修饰class，用来创建处理http请求的对象</li><li>RestController：Spring4之后加入的注解，原来在<code>@Controller中</code>返回json需要<code>@ResponseBody</code>来配合，如<br>果直接用<code>@RestController</code>替代<code>@Controller</code>就不需要再配置<code>@ResponseBody</code>，默认返回json格式。</li><li>RequestMapping：配置url映射</li></ul><p>若一个Controller类中有Web页面需要渲染，类注解只能用<code>@Controller</code>，否则报错</p><h4 id="3-2-Controller简单代码编写"><a href="#3-2-Controller简单代码编写" class="headerlink" title="3.2 Controller简单代码编写"></a>3.2 Controller简单代码编写</h4><figure class="highlight actionscript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta"><span class="meta-keyword">import</span> org.springframework.beans.factory.annotation.Autowired;</span></span><br><span class="line"><span class="meta"><span class="meta-keyword">import</span> org.springframework.stereotype.Controller;</span></span><br><span class="line"><span class="meta"><span class="meta-keyword">import</span> org.springframework.ui.Model;</span></span><br><span class="line"><span class="meta"><span class="meta-keyword">import</span> org.springframework.web.bind.annotation.RequestMapping;</span></span><br><span class="line"></span><br><span class="line"><span class="meta"><span class="meta-keyword">import</span> com.ziv.model.User;</span></span><br><span class="line"><span class="meta"><span class="meta-keyword">import</span> com.ziv.repository.UserRepository;</span></span><br><span class="line"></span><br><span class="line">@Controller</span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">DemoController</span> </span>{</span><br><span class="line">@Autowired</span><br><span class="line"><span class="keyword">private</span> UserRepository userRep;</span><br><span class="line"></span><br><span class="line">@RequestMapping(<span class="string">"/hello"</span>)</span><br><span class="line"><span class="keyword">public</span> String showDemo(Model model){</span><br><span class="line">User user = <span class="keyword">new</span> User(<span class="string">"DouDo"</span>,<span class="number">26</span>);</span><br><span class="line">userRep.save(user);</span><br><span class="line">model.addAttribute(<span class="string">"User"</span>, user);</span><br><span class="line"><span class="keyword">return</span> <span class="string">"Hello"</span>;</span><br><span class="line"><span class="comment">/*返回的Hello为模板路径，默认配置下只要写`src/main/resources/templates/`路径后的路径，</span></span><br><span class="line"><span class="comment">且不需要写后缀(".html")*/</span></span><br><span class="line">}</span><br><span class="line">}</span><br></pre></td></tr></table></figure><h3 id="4-视图层"><a href="#4-视图层" class="headerlink" title="4. 视图层"></a>4. 视图层</h3><figure class="highlight dust"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line"><span class="xml"><span class="meta"><!DOCTYPE html></span></span></span><br><span class="line"><span class="xml"><span class="tag"><<span class="name">html</span>></span></span></span><br><span class="line"><span class="xml"><span class="tag"><<span class="name">head</span>></span></span></span><br><span class="line"><span class="xml"><span class="tag"><<span class="name">meta</span> <span class="attr">charset</span>=<span class="string">"UTF-8"</span>></span></span></span><br><span class="line"><span class="xml"><span class="tag"><<span class="name">title</span>></span>Demo Test<span class="tag"></<span class="name">title</span>></span></span></span><br><span class="line"><span class="xml"><span class="tag"></<span class="name">head</span>></span></span></span><br><span class="line"><span class="xml"><span class="tag"><<span class="name">body</span>></span></span></span><br><span class="line"><span class="xml"><span class="tag"><<span class="name">h1</span> <span class="attr">th:text</span>=<span class="string">"'name: '+$</span></span></span><span class="template-variable">{User.name}</span><span class="xml"><span class="tag"><span class="string">"</span>></span><span class="tag"></<span class="name">h1</span>></span></span></span><br><span class="line"><span class="xml"><span class="tag"><<span class="name">h1</span> <span class="attr">th:text</span>=<span class="string">"'age: '+$</span></span></span><span class="template-variable">{User.age}</span><span class="xml"><span class="tag"><span class="string">"</span>></span><span class="tag"></<span class="name">h1</span>></span></span></span><br><span class="line"><span class="xml"><span class="tag"></<span class="name">body</span>></span></span></span><br><span class="line"><span class="xml"><span class="tag"></<span class="name">html</span>></span></span></span><br></pre></td></tr></table></figure><p>到此，一个简单的spring boot整合Thymeleaf+spring-data-jpa项目便创建好了，运行<code>DemoApplication.java</code>类中的main方法启动程序，在浏览器输入<code>http://localhost:8080/hello</code>便能看到结果:<br><img src="/assets/blogImg/180228/6.png" alt="浏览器展示"></p><p>与此同时，数据库中也插入了相应数据：<br><img src="/assets/blogImg/180228/5.png" alt="数据库表相应的数据"></p>]]></content>
<summary type="html">
<blockquote>
<p>笔记整理</p>
</blockquote>
<ul>
<li>Spring Boot搭建简单项目，容易上手，无需手动配置繁杂的xml文件,copy大量的重复配置代码。</li>
<li>Thymeleaf模板引擎渲染web视图，可完全替代JSP，使用Thymeleaf的主要目标在于提供一种可被浏览器正确显示的、格式良好的模板创建方式，（即创建 .html文件可被浏览器直接浏览）因此也可以用作静态建模。</li>
<li>spring-data-jpa可简化数据访问，减少大量sql语句，尤其是基本的增删改查</li>
</ul>
</summary>
<category term="Note" scheme="http://www.regularmisu.com/categories/Note/"/>
<category term="spring boot" scheme="http://www.regularmisu.com/tags/spring-boot/"/>
<category term="Jpa" scheme="http://www.regularmisu.com/tags/Jpa/"/>
<category term="Thymeleaf" scheme="http://www.regularmisu.com/tags/Thymeleaf/"/>
<category term="java" scheme="http://www.regularmisu.com/tags/java/"/>
</entry>
<entry>
<title>spring-data-jpa常用注解</title>
<link href="http://www.regularmisu.com/2018/02/24/spring-data-jpa%E5%B8%B8%E7%94%A8%E6%B3%A8%E8%A7%A3/"/>
<id>http://www.regularmisu.com/2018/02/24/spring-data-jpa常用注解/</id>
<published>2018-02-24T05:45:19.000Z</published>
<updated>2018-03-06T02:10:14.703Z</updated>
<content type="html"><![CDATA[<p>记录一些spring-data-jpa常用的注解,代码运行环境：spring boot + spring-data-jpa</p><h2 id="Entity"><a href="#Entity" class="headerlink" title="@Entity"></a>@Entity</h2><figure class="highlight sqf"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">被Entity标注的实体类将会被JPA管理控制，在程序运行时，JPA会识别并映射到指定的数据库表</span><br><span class="line">唯一参数<span class="built_in">name</span>:指定实体类名称，默认为当前实体类的非限定名称。</span><br><span class="line">若给了<span class="built_in">name</span>属性值即@Entity(<span class="built_in">name</span>=<span class="string">"XXX"</span>)，则jpa在仓储层(数据层)进行自定义查询时，所查的表名应是XXX。</span><br><span class="line">如：<span class="built_in">select</span> s <span class="keyword">from</span> XXX s</span><br></pre></td></tr></table></figure><a id="more"></a><h2 id="Table"><a href="#Table" class="headerlink" title="@Table"></a>@Table</h2><figure class="highlight less"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">当你想生成的数据库表名与实体类名称不同时，使用 <span class="variable">@Table</span>(name=<span class="string">"数据库表名"</span>),与<span class="variable">@Entity</span>标注并列使用，置于实体</span><br><span class="line">类声明语句之前</span><br><span class="line"><span class="variable">@Entity</span></span><br><span class="line"><span class="variable">@Table</span>(name=<span class="string">"t_student"</span>)</span><br><span class="line">public class student{</span><br><span class="line"> ...</span><br><span class="line">}</span><br></pre></td></tr></table></figure><p>@Table中的参数(不常用)</p><ul><li>catalog: 用于设置表所映射到的数据库的目录</li><li>schema: 用于设置表所映射到的数据库的模式</li><li>uniqueConstraints: 设置约束条件</li></ul><h2 id="Id"><a href="#Id" class="headerlink" title="@Id"></a>@Id</h2><figure class="highlight aspectj"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">@Id</span> 用于实体类的一个属性或者属性对应的getter方法的标注，被标注的的属性将映射为数据库主键</span><br></pre></td></tr></table></figure><h2 id="GeneratedValue"><a href="#GeneratedValue" class="headerlink" title="@GeneratedValue"></a>@GeneratedValue</h2><figure class="highlight less"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">与<span class="variable">@Id</span>一同使用，用于标注主键的生成策略，通过 strategy 属性指定。默认是JPA自动选择合适的策略</span><br><span class="line">在 javax.persistence.GenerationType 中定义了以下几种可供选择的策略：</span><br><span class="line"> - IDENTITY：采用数据库ID自增长的方式产生主键，Oracle 不支持这种方式。</span><br><span class="line"> - AUTO： JPA 自动选择合适的策略，是默认选项。</span><br><span class="line"> - SEQUENCE：通过序列产生主键，通过<span class="variable">@SequenceGenerator</span>标注指定序列名，MySQL 不支持这种方式。</span><br><span class="line"> - TABLE：通过表产生主键，框架借由表模拟序列产生主键，使用该策略更易于做数据库移植。</span><br></pre></td></tr></table></figure><h2 id="Basic"><a href="#Basic" class="headerlink" title="@Basic"></a>@Basic</h2><figure class="highlight less"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line"><span class="variable">@Basic</span>表示一个简单的属性到数据库表的字段的映射,对于没有任何标注的 getXxxx() 方法,默认即为<span class="variable">@Basic</span>(fetch=FetechType.EAGER)</span><br><span class="line"><span class="variable">@Basic</span>参数：</span><br><span class="line"> <span class="number">1</span>. fetch 表示该属性的加载读取策略</span><br><span class="line"> <span class="number">1.1</span> EAGER 主动抓取 （默认为EAGER）</span><br><span class="line"> <span class="number">1.2</span> LAZY 延迟加载,只有用到该属性时才会去加载</span><br><span class="line"> <span class="number">2</span>. optional (默认为 true)</span><br><span class="line"> 表示该属性是否允许为null</span><br></pre></td></tr></table></figure><h2 id="Column"><a href="#Column" class="headerlink" title="@Column"></a>@Column</h2><figure class="highlight less"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">通常置于实体的属性声明之前，可与 <span class="variable">@Id</span> 标注一起使用</span><br><span class="line"><span class="variable">@Column</span>参数：</span><br><span class="line"> <span class="number">1</span>. <span class="attribute">name</span>: 指定映射到数据库中的字段名</span><br><span class="line"> <span class="number">2</span>. <span class="attribute">unique</span>: 是否唯一，默认为false</span><br><span class="line"> <span class="number">3</span>. <span class="attribute">nullable</span>: 是否允许为null，默认为true</span><br><span class="line"> <span class="number">5</span>. <span class="attribute">insertable</span>: 是否允许插入，默认为true</span><br><span class="line"> <span class="number">6</span>. <span class="attribute">updatetable</span>: 是否允许更新，默认为true</span><br><span class="line"> <span class="number">7</span>. <span class="attribute">columnDefinition</span>: 指定该属性映射到数据库中的实际类型，通常是自动判断。</span><br></pre></td></tr></table></figure><h2 id="Transient"><a href="#Transient" class="headerlink" title="@Transient"></a>@Transient</h2><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">JPA会忽略该属性，不会映射到数据库中，即程序运行后数据库中将不会有该字段</span><br></pre></td></tr></table></figure><h2 id="Temporal"><a href="#Temporal" class="headerlink" title="@Temporal"></a>@Temporal</h2><figure class="highlight haml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">Java中没有定义 Date 类型的精度，而数据库中，表示时间类型的数据有 DATE,TIME,TIMESTAMP三种精度</span><br><span class="line"> -<span class="ruby"> @Temporal(TemporalType.DATE) 表示映射到数据库中的时间类型为 DATE，只有日期</span></span><br><span class="line"><span class="ruby"> - @Temporal(TemporalType.TIME) 表示映射到数据库中的时间类型为 TIME，只有时间</span></span><br><span class="line"><span class="ruby"> - @Temporal(TemporalType.TIMESTAMP) 表示映射到数据库中的时间类型为 TIMESTAMP,日期和时间都有</span></span><br></pre></td></tr></table></figure><h2 id="Embedded-和-Embeddable"><a href="#Embedded-和-Embeddable" class="headerlink" title="@Embedded 和 @Embeddable"></a>@Embedded 和 @Embeddable</h2><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">用于一个实体类要在多个不同的实体类中进行使用，而本身又不需要独立生成一个数据库表</span><br></pre></td></tr></table></figure><p>网上有一份比较详细说明，可参考<a href="http://blog.csdn.net/lmy86263/article/details/52108130" target="_blank" rel="noopener">链接</a></p><h2 id="JoinColumn"><a href="#JoinColumn" class="headerlink" title="@JoinColumn"></a>@JoinColumn</h2><figure class="highlight groovy"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">定义表关联的外键字段名</span><br><span class="line">常用参数有：</span><br><span class="line"> <span class="number">1.</span> <span class="string">name:</span> 指定映射到数据库中的外键的字段名</span><br><span class="line"> <span class="number">2.</span> <span class="string">unique:</span> 是否唯一，默认为<span class="literal">false</span></span><br><span class="line"> <span class="number">3.</span> <span class="string">nullable:</span> 是否允许为<span class="literal">null</span>，默认为<span class="literal">true</span></span><br><span class="line"> <span class="number">4.</span> <span class="string">insertable:</span> 是否允许插入，默认为<span class="literal">true</span></span><br><span class="line"> <span class="number">5.</span> <span class="string">updatetable:</span> 是否允许更新，默认为<span class="literal">true</span></span><br><span class="line"> <span class="number">6.</span> <span class="string">columnDefinition:</span> 指定该属性映射到数据库中的实际类型，通常是自动判断。</span><br></pre></td></tr></table></figure><h2 id="OneToOne"><a href="#OneToOne" class="headerlink" title="@OneToOne"></a>@OneToOne</h2><p>参数：</p><ul><li>targetEntity： 指定关联实体类型，默认为被注解的属性或方法所属的类</li><li>cascade： 级联操作策略 <ol><li>CascadeType.ALL 级联所有操作</li><li>CascadeType.PERSIST 级联新增</li><li>CascadeType.MERGE 级联归并更新</li><li>CascadeType.REMOVE 级联删除</li><li>CascadeType.REFRESH 级联刷新</li><li>CascadeType.DETACH 级联分离</li></ol></li><li>fetch： fetch 表示该属性的加载读取策略 (默认值为 <code>EAGER</code>)<ol><li>EAGER 主动抓取</li><li>LAZY 延迟加载,只有用到该属性时才会去加载 </li></ol></li><li>optional： 默认为true，关联字段是否为空<br> 如果为false，则常与@JoinColumn一起使用</li><li>mappedBy： 指定关联关系，该参数只用于关联关系被拥有方<br>只用于双向关联<code>@OneToOne</code>,<code>@OneToMany</code>,<code>@ManyToMany</code>。而<code>@ManyToOne</code>中没有<br> @OneToOne(mappedBy = “xxx”)<br> 表示xxx所对应的类为关系被拥有方，而关联的另一方为关系拥有方 <ul><li>关系拥有方：对应拥有外键的数据库表</li><li>关系被拥有方：对应主键被子表引用为外键的数据库表</li></ul></li><li>orphanRemoval:默认值为false<br>判断是否自动删除与关系拥有方不存在联系的关系被拥有方(关系被拥有方的一个主键在关系拥有方中未被引用，<br>当jpa执行更新操作时，是否删除数据库中此主键所对应的一条记录，若为true则删除) </li></ul><figure class="highlight less"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">//单向 一对一</span></span><br><span class="line"><span class="variable">@Entity</span> </span><br><span class="line">public class Emp{<span class="comment">//员工</span></span><br><span class="line"> <span class="variable">@Id</span></span><br><span class="line"> <span class="variable">@GeneratedValue</span></span><br><span class="line"> privte Integer eId;</span><br><span class="line"></span><br><span class="line"> <span class="variable">@Column</span>(length = <span class="number">40</span>)</span><br><span class="line"> private String empName;</span><br><span class="line"></span><br><span class="line"> <span class="variable">@OneToOne</span>(cascade = CascadeType.ALL)</span><br><span class="line"> private Identity identity;</span><br><span class="line"> <span class="comment">//get,set方法省略</span></span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="variable">@Entity</span></span><br><span class="line">public class Identity{<span class="comment">//身份证</span></span><br><span class="line"></span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="comment">//双向 一对一</span></span><br><span class="line"><span class="variable">@Entity</span> </span><br><span class="line">public class Emp{</span><br><span class="line"> <span class="variable">@Id</span></span><br><span class="line"> <span class="variable">@GeneratedValue</span></span><br><span class="line"> privte Integer eId;</span><br><span class="line"></span><br><span class="line"> <span class="variable">@Column</span>(length = <span class="number">40</span>)</span><br><span class="line"> private String empName;</span><br><span class="line"></span><br><span class="line"> <span class="variable">@OneToOne</span>(cascade = CascadeType.ALL)</span><br><span class="line"> private Identity identity;</span><br><span class="line"> <span class="comment">//get,set方法省略</span></span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="variable">@Entity</span></span><br><span class="line">public class Identity{</span><br><span class="line"> <span class="variable">@Id</span></span><br><span class="line"> <span class="variable">@GeneratedValue</span></span><br><span class="line"> privte Integer iId;</span><br><span class="line"></span><br><span class="line"> <span class="variable">@OneToOne</span>(cascade = CascadeType.ALL, mappedBy = <span class="string">"identity"</span>)</span><br><span class="line"> private Emp emp;</span><br><span class="line"> <span class="comment">//...</span></span><br><span class="line">}</span><br></pre></td></tr></table></figure><p>以上例子，双向一对一，Emp 为关系拥有方，Identity 为关系被拥有方。<br>执行spring-data-jpa新增操作时，如果通过Identity的数据访问层进行新增操作(IdentityRepository.save())<br>，Emp表和Identity表都有数据，但是不会设置这两条数据的关系，Emp表中的外键为null。<br>反之，以关系拥有方Emp的数据访问层进行新增操作(EmpRepository.save()),Emp表和Identity表都有数据，并且<br>设置了两条数据的关系，即Emp表中的外键也得到正确新增</p><h2 id="ManyToOne、-OneToMany"><a href="#ManyToOne、-OneToMany" class="headerlink" title="@ManyToOne、@OneToMany"></a>@ManyToOne、@OneToMany</h2><p>多对一(也可叫一对多，只是前后表颠倒一下而已)，只有双向多对一时才用得到@OneToMany。多对一中多的一方必定是对应数据库中拥有外键的表，即是关系拥有方，<code>@ManyToOne</code>只用在多对一中代表多的一类中，因为<code>mappedBy</code>只用于关系被拥有方，所以<code>@ManyToOne</code>参数中不包含<code>mappedBy</code>。 </p><p><code>@ManyToOne</code>参数:</p><ul><li>targetEntity： 指定关联实体类型，默认为被注解的属性或方法所属的类</li><li>cascade： 级联操作策略 <ol><li>CascadeType.ALL 级联所有操作</li><li>CascadeType.PERSIST 级联新增</li><li>CascadeType.MERGE 级联归并更新</li><li>CascadeType.REMOVE 级联删除</li><li>CascadeType.REFRESH 级联刷新</li><li>CascadeType.DETACH 级联分离</li></ol></li><li>fetch： fetch 表示该属性的加载读取策略(@ManyToOne 的默认值是 <code>EAGER</code>，@OneToMany 的默认值是 <code>LAZY</code>) <ol><li>EAGER 主动抓取</li><li>LAZY 延迟加载,只有用到该属性时才会去加载 </li></ol></li><li>optional： 默认为true，关联字段是否为空<br> 如果为false，则常与@JoinColumn一起使用 </li></ul><p><code>@OneToMany</code> 参数除上述以外还有：</p><ul><li>mappedBy: 指定关联关系，该参数只用于关联关系被拥有方<br>只用于双向关联<code>@OneToOne</code>,<code>@OneToMany</code>,<code>@ManyToMany</code>。而<code>@ManyToOne</code>中没有<br> @OneToMany(mappedBy = “xxx”)<br> 表示xxx所对应的类为关系被拥有方，而关联的另一方为关系拥有方 <ul><li>关系拥有方：对应拥有外键的数据库表</li><li>关系被拥有方：对应主键被子表引用为外键的数据库表</li></ul></li><li>orphanRemoval:默认值为false<br>判断是否自动删除与关系拥有方不存在联系的关系被拥有方(关系被拥有方的一个主键在关系拥有方中未被引用，<br>当jpa执行更新操作时，是否删除数据库中此主键所对应的一条记录，若为true则删除)</li></ul><figure class="highlight less"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">//单向 多对一</span></span><br><span class="line"><span class="variable">@Entity</span></span><br><span class="line">public class Emp{</span><br><span class="line"> <span class="variable">@Id</span></span><br><span class="line"> <span class="variable">@GeneratedValue</span></span><br><span class="line"> privte Integer eId;</span><br><span class="line"></span><br><span class="line"> <span class="variable">@Column</span>(length = <span class="number">40</span>)</span><br><span class="line"> private String empName;</span><br><span class="line"></span><br><span class="line"> <span class="variable">@ManyToOne</span>(cascade = CascadeType.ALL)</span><br><span class="line"> private Dept dept;</span><br><span class="line"> <span class="comment">//...</span></span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="variable">@Entity</span></span><br><span class="line">public class Dept{</span><br><span class="line"> <span class="variable">@Id</span></span><br><span class="line"> <span class="variable">@GeneratedValue</span></span><br><span class="line"> privte Integer dId;</span><br><span class="line"></span><br><span class="line"> <span class="variable">@Column</span>(length = <span class="number">40</span>)</span><br><span class="line"> private String deptName;</span><br><span class="line"> <span class="comment">//...</span></span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="comment">//双向 多对一</span></span><br><span class="line"><span class="variable">@Entity</span></span><br><span class="line">public class Emp{</span><br><span class="line"> <span class="variable">@Id</span></span><br><span class="line"> <span class="variable">@GeneratedValue</span></span><br><span class="line"> privte Integer eId;</span><br><span class="line"></span><br><span class="line"> <span class="variable">@Column</span>(length = <span class="number">40</span>)</span><br><span class="line"> private String empName;</span><br><span class="line"></span><br><span class="line"> <span class="variable">@ManyToOne</span>(cascade = CascadeType.ALL)</span><br><span class="line"> private Emp emp;</span><br><span class="line"> <span class="comment">//...</span></span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="variable">@Entity</span></span><br><span class="line">public class Dept{</span><br><span class="line"> <span class="variable">@Id</span></span><br><span class="line"> <span class="variable">@GeneratedValue</span></span><br><span class="line"> privte Integer dId;</span><br><span class="line"></span><br><span class="line"> <span class="variable">@Column</span>(length = <span class="number">40</span>)</span><br><span class="line"> private String deptName;</span><br><span class="line"></span><br><span class="line"> <span class="variable">@OneToMany</span>(cascade = CascadeType.ALL, mappedBy = <span class="string">"emp"</span>)</span><br><span class="line"> private List<Emp> emps;</span><br><span class="line"> <span class="comment">//省略get、set方法</span></span><br><span class="line">}</span><br></pre></td></tr></table></figure><p> 无论双向关联还是单向关联，数据库中均会在Emp表中自动生成一个外键（dept_d_id）</p><h2 id="ManyToMany"><a href="#ManyToMany" class="headerlink" title="@ManyToMany"></a>@ManyToMany</h2><ul><li>targetEntity： 指定关联实体类型，默认为被注解的属性或方法所属的类</li><li>cascade： 级联操作策略 <ol><li>CascadeType.ALL 级联所有操作</li><li>CascadeType.PERSIST 级联新增</li><li>CascadeType.MERGE 级联归并更新</li><li>CascadeType.REMOVE 级联删除</li><li>CascadeType.REFRESH 级联刷新</li><li>CascadeType.DETACH 级联分离</li></ol></li><li>fetch： fetch 表示该属性的加载读取策略 (默认值为 <code>LAZY</code>)<ol><li>EAGER 主动抓取 </li><li>LAZY 延迟加载,只有用到该属性时才会去加载 </li></ol><ul><li>mappedBy: 指定关联关系，该参数只用于关联关系被拥有方<br>只用于双向关联<code>@OneToOne</code>,<code>@OneToMany</code>,<code>@ManyToMany</code>。而<code>@ManyToOne</code>中没有。<br> @ManyToMany(mappedBy = “xxx”)<br> 表示xxx所对应的类为关系被拥有方，而关联的另一方为关系拥有方：<ul><li>关系拥有方：对应拥有外键的数据库表</li><li>关系被拥有方：对应主键被子表引用为外键的数据库表</li></ul></li></ul></li></ul><figure class="highlight less"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">//单向 多对多</span></span><br><span class="line"><span class="variable">@Entity</span></span><br><span class="line">public class Student{</span><br><span class="line"> <span class="variable">@ManyToMany</span>(cascade = CascadeType.ALL)</span><br><span class="line"> private List<Course> courses;</span><br><span class="line"> <span class="comment">//...</span></span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="variable">@Entity</span></span><br><span class="line">public class Course{</span><br><span class="line"> <span class="comment">//...</span></span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="comment">//双向 多对多</span></span><br><span class="line"><span class="variable">@Entity</span></span><br><span class="line">public class Student{</span><br><span class="line"> <span class="variable">@ManyToMany</span>(cascade = CascadeType.ALL)</span><br><span class="line"> private List<Course> courses;</span><br><span class="line"> <span class="comment">//...</span></span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="variable">@Entity</span></span><br><span class="line">public class Course{</span><br><span class="line"> <span class="variable">@ManyToMany</span>(cascade = CascadeType.ALL, mappedBy = <span class="string">"courses"</span>)</span><br><span class="line"> private List<Student> students;</span><br><span class="line"> <span class="comment">//...</span></span><br><span class="line">}</span><br></pre></td></tr></table></figure><blockquote><p>所有双向关联使用时需谨慎，查询时容易引起栈内存溢出，尽量使用单向关联</p></blockquote><h2 id="Enumerated"><a href="#Enumerated" class="headerlink" title="@Enumerated"></a>@Enumerated</h2><p>当实体类中有枚举类型的属性时，默认情况下自动生成的数据库表中对应的字段类型是枚举的索引值，是数字类型的，若希望数据库中存储的是枚举对应的String类型，在属性上加入<code>@Enumerated(EnumType.STRING)</code>注解即可。<br><figure class="highlight less"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line"><span class="variable">@Enumerated</span>(EnumType.STRING)</span><br><span class="line"><span class="variable">@Column</span>(nullable = true)</span><br><span class="line">private RoleEnum role;</span><br></pre></td></tr></table></figure></p>]]></content>
<summary type="html">
<p>记录一些spring-data-jpa常用的注解,代码运行环境：spring boot + spring-data-jpa</p>
<h2 id="Entity"><a href="#Entity" class="headerlink" title="@Entity"></a>@Entity</h2><figure class="highlight sqf"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">被Entity标注的实体类将会被JPA管理控制，在程序运行时，JPA会识别并映射到指定的数据库表</span><br><span class="line">唯一参数<span class="built_in">name</span>:指定实体类名称，默认为当前实体类的非限定名称。</span><br><span class="line">若给了<span class="built_in">name</span>属性值即@Entity(<span class="built_in">name</span>=<span class="string">"XXX"</span>)，则jpa在仓储层(数据层)进行自定义查询时，所查的表名应是XXX。</span><br><span class="line">如：<span class="built_in">select</span> s <span class="keyword">from</span> XXX s</span><br></pre></td></tr></table></figure>
</summary>
<category term="Note" scheme="http://www.regularmisu.com/categories/Note/"/>
<category term="jpa" scheme="http://www.regularmisu.com/tags/jpa/"/>
<category term="注解" scheme="http://www.regularmisu.com/tags/%E6%B3%A8%E8%A7%A3/"/>
<category term="数据库" scheme="http://www.regularmisu.com/tags/%E6%95%B0%E6%8D%AE%E5%BA%93/"/>
</entry>
<entry>
<title>spring-data-jpa双向表关联查询时引发异常：java.lang.StackOverflowError: null</title>
<link href="http://www.regularmisu.com/2018/02/01/spring-data-jpa%E5%8F%8C%E5%90%91%E8%A1%A8%E5%85%B3%E8%81%94%E6%9F%A5%E8%AF%A2%E6%97%B6%E5%BC%95%E5%8F%91%E5%BC%82%E5%B8%B8%EF%BC%9Ajava-lang-StackOverflowError-null/"/>
<id>http://www.regularmisu.com/2018/02/01/spring-data-jpa双向表关联查询时引发异常：java-lang-StackOverflowError-null/</id>
<published>2018-02-01T06:37:32.000Z</published>
<updated>2018-02-01T06:47:20.410Z</updated>
<content type="html"><![CDATA[<blockquote><p>工作时不忘学习，学习时不忘记笔记。 </p></blockquote><h3 id="项目异常如下："><a href="#项目异常如下：" class="headerlink" title="项目异常如下："></a>项目异常如下：</h3><figure class="highlight xl"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line"><span class="number">2018</span>-<span class="number">01</span>-<span class="number">26</span> <span class="number">17</span>:<span class="number">12</span>:<span class="number">38.162</span> WARN <span class="number">3128</span> --- [<span class="function"><span class="title">nio</span>-8080-exec-6] .w.s.m.s.DefaultHandlerExceptionResolver : Failed to write HTTP message: org.springframework.http.converter.HttpMessageNotWritableException: Could <span class="built_in">not</span> write JSON: Infinite recursion (StackOverflowError); nested exception <span class="keyword">is</span> com.fasterxml.jackson.databind.JsonMappingException: Infinite recursion (StackOverflowError) (through reference chain: demo.server.core.domain.User["userAddresses"]-></span></span><br><span class="line"><span class="function"><span class="title">org</span>.hibernate.collection.internal.PersistentBag[0]-></span></span><br><span class="line"><span class="function"><span class="title">demo</span>.server.core.domain.UserAddress["user"]-></span></span><br><span class="line"><span class="function"><span class="title">demo</span>.server.core.domain.User["userAddresses"]-></span></span><br><span class="line"><span class="function"><span class="title">org</span>.hibernate.collection.internal.PersistentBag[0]-></span></span><br><span class="line"><span class="function"><span class="title">demo</span>.server.core.domain.UserAddress["user"]-></span></span><br><span class="line">......<span class="comment">//无限递归</span></span><br></pre></td></tr></table></figure><a id="more"></a><figure class="highlight stylus"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br></pre></td><td class="code"><pre><span class="line">java<span class="selector-class">.lang</span><span class="selector-class">.StackOverflowError</span>: null</span><br><span class="line">at java<span class="selector-class">.lang</span><span class="selector-class">.ClassLoader</span><span class="selector-class">.defineClass1</span>(Native Method) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at java<span class="selector-class">.lang</span><span class="selector-class">.ClassLoader</span><span class="selector-class">.defineClass</span>(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at java<span class="selector-class">.security</span><span class="selector-class">.SecureClassLoader</span><span class="selector-class">.defineClass</span>(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at java<span class="selector-class">.net</span><span class="selector-class">.URLClassLoader</span><span class="selector-class">.defineClass</span>(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at java<span class="selector-class">.net</span><span class="selector-class">.URLClassLoader</span><span class="selector-class">.access</span>$<span class="number">100</span>(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at java<span class="selector-class">.net</span><span class="selector-class">.URLClassLoader</span>$<span class="number">1</span>.run(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at java<span class="selector-class">.net</span><span class="selector-class">.URLClassLoader</span>$<span class="number">1</span>.run(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at java<span class="selector-class">.security</span><span class="selector-class">.AccessController</span><span class="selector-class">.doPrivileged</span>(Native Method) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at java<span class="selector-class">.net</span><span class="selector-class">.URLClassLoader</span><span class="selector-class">.findClass</span>(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at java<span class="selector-class">.lang</span><span class="selector-class">.ClassLoader</span><span class="selector-class">.loadClass</span>(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at sun<span class="selector-class">.misc</span><span class="selector-class">.Launcher</span><span class="variable">$AppClassLoader</span>.loadClass(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at java<span class="selector-class">.lang</span><span class="selector-class">.ClassLoader</span><span class="selector-class">.loadClass</span>(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at com<span class="selector-class">.fasterxml</span><span class="selector-class">.jackson</span><span class="selector-class">.databind</span><span class="selector-class">.ser</span><span class="selector-class">.std</span><span class="selector-class">.BeanSerializerBase</span><span class="selector-class">.serializeFields</span>(BeanSerializerBase<span class="selector-class">.java</span>:<span class="number">709</span>) ~[jackson-databind-<span class="number">2.8</span>.<span class="number">1</span><span class="selector-class">.jar</span>:<span class="number">2.8</span>.<span class="number">1</span>]</span><br><span class="line">at com<span class="selector-class">.fasterxml</span><span class="selector-class">.jackson</span><span class="selector-class">.databind</span><span class="selector-class">.ser</span><span class="selector-class">.BeanSerializer</span><span class="selector-class">.serialize</span>(BeanSerializer<span class="selector-class">.java</span>:<span class="number">155</span>) ~[jackson-databind-<span class="number">2.8</span>.<span class="number">1</span><span class="selector-class">.jar</span>:<span class="number">2.8</span>.<span class="number">1</span>]</span><br><span class="line">at com<span class="selector-class">.fasterxml</span><span class="selector-class">.jackson</span><span class="selector-class">.databind</span><span class="selector-class">.ser</span><span class="selector-class">.std</span><span class="selector-class">.CollectionSerializer</span><span class="selector-class">.serializeContents</span>(CollectionSerializer<span class="selector-class">.java</span>:<span class="number">149</span>) ~[jackson-databind-<span class="number">2.8</span>.<span class="number">1</span><span class="selector-class">.jar</span>:<span class="number">2.8</span>.<span class="number">1</span>]</span><br><span class="line">at</span><br><span class="line">...</span><br></pre></td></tr></table></figure><p>看异常的名字会发现是栈溢出，而且第一处后面出现大量的递归的提示，这边的原因是因为使用了jpa的实体类注解@ManyToMany,@ManyToOne,@OneToOne并且是双向表关联</p><h3 id="举个例子："><a href="#举个例子：" class="headerlink" title="举个例子："></a>举个例子：</h3><figure class="highlight less"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line"><span class="variable">@Entity</span></span><br><span class="line"><span class="variable">@Table</span>(name = <span class="string">"t_student"</span>)</span><br><span class="line">public class Student{</span><br><span class="line"><span class="variable">@Id</span></span><br><span class="line"> <span class="variable">@GeneratedValue</span></span><br><span class="line">private Integer sId;</span><br><span class="line"><span class="variable">@Column</span>(length = <span class="number">20</span>)</span><br><span class="line"> private String sName;</span><br><span class="line"><span class="comment">//学生所修课程</span></span><br><span class="line"> <span class="variable">@ManyToMany</span>(mappedBy = <span class="string">"students"</span>)</span><br><span class="line"> private List<Course> courses;</span><br><span class="line"> <span class="comment">//get、set 方法省略</span></span><br><span class="line">}</span><br></pre></td></tr></table></figure><figure class="highlight less"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line"><span class="variable">@Entity</span></span><br><span class="line"><span class="variable">@Table</span>(name = <span class="string">"t_course"</span>)</span><br><span class="line">public class Course{</span><br><span class="line"><span class="variable">@Id</span></span><br><span class="line"> <span class="variable">@GeneratedValue</span></span><br><span class="line">private Integer cId;</span><br><span class="line"><span class="variable">@Column</span>(length = <span class="number">20</span>)</span><br><span class="line"> private String cName;</span><br><span class="line"><span class="comment">//上课的学生</span></span><br><span class="line"> <span class="variable">@ManyToMany</span>(cascade = CascadeType.ALL)</span><br><span class="line"> private List<Student> students;</span><br><span class="line"> <span class="comment">//get、set 方法省略</span></span><br><span class="line">}</span><br></pre></td></tr></table></figure><p>一个student类和一个course类分别对应 t_student 表和 t_course表,它们是多对多的关系，一个学生可以修多个课程，一个课程可以有多个学生修</p><h3 id="省略仓储层代码…"><a href="#省略仓储层代码…" class="headerlink" title="省略仓储层代码…"></a>省略仓储层代码…</h3><h3 id="控制层代码"><a href="#控制层代码" class="headerlink" title="控制层代码"></a>控制层代码</h3><figure class="highlight kotlin"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">@RestController</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">TestController</span></span>{</span><br><span class="line"><span class="meta">@Autowired</span></span><br><span class="line"><span class="keyword">private</span> StudentRepository studentRep;</span><br><span class="line"></span><br><span class="line"><span class="meta">@RequestMapping(<span class="meta-string">"/test"</span>)</span></span><br><span class="line"><span class="keyword">public</span> int test(){</span><br><span class="line">List<Student> students = stntRep.findAll();</span><br><span class="line">students.forEach(<span class="keyword">data</span>->{</span><br><span class="line">System.<span class="keyword">out</span>.println(<span class="keyword">data</span>);</span><br><span class="line">});</span><br><span class="line"><span class="keyword">return</span> <span class="number">1</span>;</span><br><span class="line">}</span><br><span class="line">}</span><br></pre></td></tr></table></figure><p>此时，程序运行便会报 java.lang.StackOverflowError: null 异常<br><figure class="highlight stylus"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br></pre></td><td class="code"><pre><span class="line">java<span class="selector-class">.lang</span><span class="selector-class">.StackOverflowError</span>: null</span><br><span class="line">at java<span class="selector-class">.util</span><span class="selector-class">.AbstractCollection</span><span class="selector-class">.toString</span>(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at org<span class="selector-class">.hibernate</span><span class="selector-class">.collection</span><span class="selector-class">.internal</span><span class="selector-class">.PersistentBag</span><span class="selector-class">.toString</span>(PersistentBag<span class="selector-class">.java</span>:<span class="number">510</span>) ~[hibernate-core-<span class="number">5.0</span>.<span class="number">12</span><span class="selector-class">.Final</span><span class="selector-class">.jar</span>:<span class="number">5.0</span>.<span class="number">12</span>.Final]</span><br><span class="line">at java<span class="selector-class">.lang</span><span class="selector-class">.String</span><span class="selector-class">.valueOf</span>(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at java<span class="selector-class">.lang</span><span class="selector-class">.StringBuilder</span><span class="selector-class">.append</span>(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at com<span class="selector-class">.demo</span><span class="selector-class">.domain</span><span class="selector-class">.Course</span><span class="selector-class">.toString</span>(Course<span class="selector-class">.java</span>:<span class="number">38</span>) ~[classes/:na]</span><br><span class="line">at java<span class="selector-class">.lang</span><span class="selector-class">.String</span><span class="selector-class">.valueOf</span>(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at java<span class="selector-class">.lang</span><span class="selector-class">.StringBuilder</span><span class="selector-class">.append</span>(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at java<span class="selector-class">.util</span><span class="selector-class">.AbstractCollection</span><span class="selector-class">.toString</span>(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at org<span class="selector-class">.hibernate</span><span class="selector-class">.collection</span><span class="selector-class">.internal</span><span class="selector-class">.PersistentBag</span><span class="selector-class">.toString</span>(PersistentBag<span class="selector-class">.java</span>:<span class="number">510</span>) ~[hibernate-core-<span class="number">5.0</span>.<span class="number">12</span><span class="selector-class">.Final</span><span class="selector-class">.jar</span>:<span class="number">5.0</span>.<span class="number">12</span>.Final]</span><br><span class="line">at java<span class="selector-class">.lang</span><span class="selector-class">.String</span><span class="selector-class">.valueOf</span>(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at java<span class="selector-class">.lang</span><span class="selector-class">.StringBuilder</span><span class="selector-class">.append</span>(Unknown Source) ~[na:<span class="number">1.8</span>.<span class="number">0</span>_111]</span><br><span class="line">at com<span class="selector-class">.demo</span><span class="selector-class">.domain</span><span class="selector-class">.Student</span><span class="selector-class">.toString</span>(Student<span class="selector-class">.java</span>:<span class="number">40</span>) ~[classes/:na]</span><br><span class="line">....</span><br></pre></td></tr></table></figure></p><p>Student类中有一个字段<code>List<Course> courses</code>，在遍历集合中，输出一个<code>student</code>实例的时候，<code>List<Course> courses</code> 字段也将输出，因为是双向多对多的关联查询，每一个<code>Course</code>实例也会输出<code>List<Student> students</code> 字段值，因此一直递归下去直到栈溢出报错，若是单向多对多就不会发生这样地递归</p><p>其实一开始报这个错完全是因为对spring-data-jpa不熟悉，了解之后一想就通了。</p><h3 id="解决办法："><a href="#解决办法：" class="headerlink" title="解决办法："></a>解决办法：</h3><p>方法一：<br>此处，若不需要查看关联表中的字段信息时，可以在遍历<code>List<Student> students</code>集合时先将关联对象设置为<code>null</code>,即：<br><figure class="highlight kotlin"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">students.forEach(<span class="keyword">data</span>->{</span><br><span class="line"><span class="keyword">data</span>.setCourses(<span class="literal">null</span>);</span><br><span class="line">System.<span class="keyword">out</span>.println(<span class="keyword">data</span>);</span><br><span class="line">});</span><br></pre></td></tr></table></figure></p><p>这样才能打印出<code>Student</code> 实例中除了<code>courses</code> 字段之外地所有数据</p><p>方法二：<br>取消使用双向多对多关联，改为使用单向多对多，这样也可以同时将关联表中所对应的数据查询出来使用</p>]]></content>
<summary type="html">
<blockquote>
<p>工作时不忘学习，学习时不忘记笔记。 </p>
</blockquote>
<h3 id="项目异常如下："><a href="#项目异常如下：" class="headerlink" title="项目异常如下："></a>项目异常如下：</h3><figure class="highlight xl"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line"><span class="number">2018</span>-<span class="number">01</span>-<span class="number">26</span> <span class="number">17</span>:<span class="number">12</span>:<span class="number">38.162</span> WARN <span class="number">3128</span> --- [<span class="function"><span class="title">nio</span>-8080-exec-6] .w.s.m.s.DefaultHandlerExceptionResolver : Failed to write HTTP message: org.springframework.http.converter.HttpMessageNotWritableException: Could <span class="built_in">not</span> write JSON: Infinite recursion (StackOverflowError); nested exception <span class="keyword">is</span> com.fasterxml.jackson.databind.JsonMappingException: Infinite recursion (StackOverflowError) (through reference chain: demo.server.core.domain.User["userAddresses"]-&gt;</span></span><br><span class="line"><span class="function"><span class="title">org</span>.hibernate.collection.internal.PersistentBag[0]-&gt;</span></span><br><span class="line"><span class="function"><span class="title">demo</span>.server.core.domain.UserAddress["user"]-&gt;</span></span><br><span class="line"><span class="function"><span class="title">demo</span>.server.core.domain.User["userAddresses"]-&gt;</span></span><br><span class="line"><span class="function"><span class="title">org</span>.hibernate.collection.internal.PersistentBag[0]-&gt;</span></span><br><span class="line"><span class="function"><span class="title">demo</span>.server.core.domain.UserAddress["user"]-&gt;</span></span><br><span class="line">......<span class="comment">//无限递归</span></span><br></pre></td></tr></table></figure>
</summary>
<category term="Note" scheme="http://www.regularmisu.com/categories/Note/"/>
<category term="异常" scheme="http://www.regularmisu.com/tags/%E5%BC%82%E5%B8%B8/"/>
<category term="jpa" scheme="http://www.regularmisu.com/tags/jpa/"/>
<category term="Java" scheme="http://www.regularmisu.com/tags/Java/"/>
<category term="spring-boot" scheme="http://www.regularmisu.com/tags/spring-boot/"/>
</entry>
<entry>
<title>现在的我，左手写代码，右手写诗</title>
<link href="http://www.regularmisu.com/2018/01/11/%E7%8E%B0%E5%9C%A8%E7%9A%84%E6%88%91%EF%BC%8C%E5%B7%A6%E6%89%8B%E5%86%99%E4%BB%A3%E7%A0%81%EF%BC%8C%E5%8F%B3%E6%89%8B%E5%86%99%E8%AF%97/"/>
<id>http://www.regularmisu.com/2018/01/11/现在的我，左手写代码，右手写诗/</id>
<published>2018-01-11T15:44:31.000Z</published>
<updated>2018-01-11T16:13:55.825Z</updated>
<content type="html"><![CDATA[<p>现在的我，左手写代码，右手写诗</p><p>已经分不清是日子变了还是人变了，<br>也许是日子变了，<br>以前，总是倒头就睡，一觉睡到自然醒，<br>现在，为了养成一个好的生活习惯，设置了两个闹钟，一个提示起床，一个提示早点睡觉。<br><a id="more"></a><br>或许是因为一段经历告诉我有些习惯该改改了。<br><br></p><p>也许是人变了<br>每天夜里，戴上耳机，听你喜欢的歌，<br>想着，时间要是没有流走，世界还定格在那一刻，<br>我在我的人生画幅里第一次找到你的提笔处，那时我必定会换支画笔来描绘我的未来，一个有你的未来。<br>然后，描绘着描绘着就睡着了，很美的进入梦乡。<br>在梦里，偶尔让我实现一次这样的美梦，<br>这样的美梦总会让我醒来时对生活充满了期待，也充满了斗志。<br><br></p><p>对比过去和现在，<br>以前，身边的话题是各种游戏，电影……<br>现在，变成汽车，房子，结婚……<br>以前，感叹学业多，考试多，<br>现在，感叹房价涨的有多快。<br>以前，遇到喜欢的女孩子，敢鼓足勇气去表白，<br>现在，结束了一段情感，却迟迟不愿走出来。<br>以前，喜欢乱买东西，<br>现在，月初计算，这个月还了信用卡，交了房租，还剩多少够平时消费的。<br>以前，孤独了，至少还有同学、室友，<br>现在，除了工作时，都是一个人。<br><img src="/assets/blogImg/now.jpg" alt=""><br><br></p><p>回到现实，<br>工作和生活上，<br>少了一些轻狂，多了一点沉稳，<br>少了一些任性，多了一点包容，<br>少了一些软弱，多了一点坚强，<br>少了一些高傲，多了一点谦虚，<br>试着去忍耐一些挫折，不再抱怨诸多的不是。<br>只是,<br>有时候，明明很想哭，却强扭着笑，<br>有时候，明明很在乎，却装作无所谓，<br>有时候，明明很痛苦，却骗自己说很幸福，<br>忘不掉的，说已经忘了，却还是每天晚上都会想，<br>放不下的，说你我已是路人，却还是偶尔打开那个相册，<br>删了微信和QQ好友，<br>却又开通了微博，关注了网易云，<br>只是想知道你过的如何。<br><br></p><p>孤单的一个人在外面，<br>最暖心的就只剩与爸妈的通信了，<br>也不知从何时起，与爸妈的通信也发生了变化，<br>以前，通信内容往往是诉说，在外遇到挫折，生活费不够了，一条短信、一段电话寻求世上最可靠的帮助。<br>现在，通信内容变成了问候：爸，妈，最近可好？别太累着，记得按时休息，我这边一切都好。<br>其实心里也有苦楚，只是说不出，怕他们担心罢了。<br>偶尔那头传来渴望的话语：儿子，什么时候找个女朋友啊？<br>我却只能说：社会变了，现在婚龄变高了，我现在还年轻，你们别急，迟早会有的……此时内心更多的只有愧疚，因为时常听他们说道，你那个同学结婚了，这个同学前不久刚刚生娃了。<br>内心也是许着：不会让你们等太久，以后要让你们过上舒舒服服的日子。<br><br></p><p>现在的我，<br>一个人吃饭，一个人看电影，一个人承担压力，<br>累了就想一些美好的。<br><img src="/assets/blogImg/CatWithPeople.jfif" alt=""></p><p>现在的我，<br>每天早上，带着你给我的温暖微笑着跟见到的每一个人说：你好！<br><br><br>现在的我，<br>过的很好，生活规律，偶尔想家，偶尔想你。</p><p><br><br><br><br><br><br><br><br>读《我今年，二十七八岁》有感而发</p>]]></content>
<summary type="html">
<p>现在的我，左手写代码，右手写诗</p>
<p>已经分不清是日子变了还是人变了，<br>也许是日子变了，<br>以前，总是倒头就睡，一觉睡到自然醒，<br>现在，为了养成一个好的生活习惯，设置了两个闹钟，一个提示起床，一个提示早点睡觉。<br>
</summary>
<category term="Essay" scheme="http://www.regularmisu.com/categories/Essay/"/>
</entry>
<entry>
<title>Hexo+Github Page搭建个人博客</title>
<link href="http://www.regularmisu.com/2018/01/02/set-up-personalBlog/"/>
<id>http://www.regularmisu.com/2018/01/02/set-up-personalBlog/</id>
<published>2018-01-02T06:12:31.000Z</published>
<updated>2018-01-11T10:22:14.924Z</updated>
<content type="html"><![CDATA[<h1 id="前言"><a href="#前言" class="headerlink" title="前言"></a>前言</h1><p>前两天刚刚搭建好这个博客，想着趁热乎，脑中还记得一些搭建时需要在意的注意点啥的。于是，便有了下文。只是希望能够给以后想自己搭建博客的人一点微不足道的帮助。有什么不对的地方可以留言告诉我。</p><a id="more"></a><h1 id="博客搭建"><a href="#博客搭建" class="headerlink" title="博客搭建"></a>博客搭建</h1><h2 id="准备工作"><a href="#准备工作" class="headerlink" title="准备工作"></a><font color="#0099ff">准备工作</font></h2><p>此教程中的博客是在Windows系统下搭建的，git用的是命令行而非图形化处理界面</p><ul><li>git（必需）</li><li>node.js （必需）</li><li>Github账号（必需）</li><li>markdown编辑器（最好有一个，以后也方便写博客）</li><li>域名 </li></ul><h2 id="git下载并安装"><a href="#git下载并安装" class="headerlink" title="git下载并安装"></a><font color="#0099ff">git下载并安装</font></h2><p>作用：将本地hexo代码提交到GitHub上，（关于git，不了解的可以参考<a href="http://blog.csdn.net/v123411739/article/details/44071059/" target="_blank" rel="noopener">史上最全github使用方法：github入门到精通</a>也可自行搜索获或者去<a href="https://git-scm.com/" target="_blank" rel="noopener">官网</a>看看）<br><a href="https://git-scm.com/download/win" target="_blank" rel="noopener">下载</a> 好相对应的git版本并安装，安装时按默认选项安装即可</p><h2 id="node-js下载并安装"><a href="#node-js下载并安装" class="headerlink" title="node.js下载并安装"></a><font color="#0099ff">node.js下载并安装</font></h2><p>同样，<a href="https://nodejs.org/en/" target="_blank" rel="noopener">下载</a> 好，安装时同样可按默认选项安装即可</p><blockquote><p>注：以上需要安装的步骤，若安装时出现问题请自行查询相关解决办法，此处不再详细说明</p></blockquote><h2 id="Github账号"><a href="#Github账号" class="headerlink" title="Github账号"></a><font color="#0099ff">Github账号</font></h2><p>申请GitHub之后即可建立个人远程库，用来做个人博客的服务器，以及生成GitHub域名，<a href="https://pages.github.com/" target="_blank" rel="noopener">可以参考此</a><br>申请GitHub账号我就不多说了</p><h2 id="安装Hexo"><a href="#安装Hexo" class="headerlink" title="安装Hexo"></a><font color="#0099ff">安装Hexo</font></h2><p>Hexo使用可以参考 <a href="https://hexo.io/zh-cn/docs/index.html" target="_blank" rel="noopener"><code>Hexo document</code></a></p><blockquote><p>Hexo 是一个快速、简洁且高效的博客框架。Hexo 使用 Markdown（或其他渲染引擎）解析文章，在几秒内，即可利用靓丽的主题生成静态网页。（$为git命令行自带不需手动输入，只需输入$后面的，以下所有命令皆是）</p></blockquote><p><strong>①</strong> 鼠标右击桌面或其他任意地方，选择Git Bash Here，使用以下命令进行安装hexo<br><figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">$</span><span class="bash"> npm install hexo-cli -g</span></span><br></pre></td></tr></table></figure></p><p><strong>②</strong> 创建放置博客源码的文件夹：hexo文件夹<br>在自己想要的位置创建文件夹，建议放在英文文件夹目录下。如：E:\hexo</p><p><strong>③</strong> 打开刚刚新建的hexo文件夹（此时文件夹需为空），右击选择Git Bash Here执行以下命令<br><figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">$</span><span class="bash"> hexo init</span></span><br></pre></td></tr></table></figure></p><p>回车之后Hexo会自动在该文件夹下下载搭建网站所需的文件</p><p><strong>④</strong> 安装依赖包<br><figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">$</span><span class="bash"> npm install</span></span><br></pre></td></tr></table></figure></p><p><strong>⑤</strong> 生成静态文件<br><figure class="highlight verilog"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$ hexo <span class="keyword">generate</span> (或者输入 hexo g)</span><br></pre></td></tr></table></figure></p><p><strong>⑥</strong> 启动本地服务器<br><figure class="highlight routeros"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$ hexo<span class="built_in"> server </span>(或者输入 hexo s)</span><br></pre></td></tr></table></figure></p><p>默认情况下，访问地址为：<code>http://localhost:4000/</code><br>此时git命令行显示如下：<br><img src="/assets/blogImg/hexo s.png" alt=""><br>由提示可以看出，hexo服务器已启动，并提示你按<code>Ctrl + C</code>来停止服务器</p><p>好了，运行到此，其实我们已经可以看到我们搭建的博客的雏形了，打开浏览器，在地址栏输入<code>http://localhost:4000/</code>在正常操作的情况下，此时你应该可以看到一个类似下面的图片的界面。这就是刚刚在本地建立的博客，别人无法访问。<br>页面如下：<br><img src="/assets/blogImg/first.png" alt=""></p><p>这边我是将我现在的博客主题切换为默认主题时的样子，所以title和subtitle是被我修改过的，这些可在E:\hexo目录下的_config.yml配置文件中修改，进去找到相应的字段在其后面添加你的文字即可（<code>:</code>后同样需要加空格）</p><h2 id="注册Github账号"><a href="#注册Github账号" class="headerlink" title="注册Github账号"></a><font color="#0099ff">注册Github账号</font></h2><p>已有Github账号跳过此步骤，点击<a href="https://github.com/" target="_blank" rel="noopener">github</a>进入注册页面</p><h2 id="创建repository"><a href="#创建repository" class="headerlink" title="创建repository"></a><font color="#0099ff">创建repository</font></h2><p>repository作为一个远程的仓储室，即一个远程仓库，用来放置你上传的源码<br><img src="/assets/blogImg/repository1.png" alt=""> </p><p>按照途中数字顺序进行操作，第③步时，blog为你想取的repository名，<code>.github.io</code>别忘了加上，后面设置需要<br><img src="/assets/blogImg/repository2.png" alt=""></p><h2 id="部署本地文件到github"><a href="#部署本地文件到github" class="headerlink" title="部署本地文件到github"></a><font color="#0099ff">部署本地文件到github</font></h2><p>远程仓库和本地仓库都创建好了，剩下的就是建立将本地代码提交到远程仓库的路径了，如此才能连接本地仓库和远程github提供的仓库。打开<code>E:\hexo</code>（刚刚新建的生成本地博客代码的文件夹）下的<code>_config.yml</code>文件，因为是mackdown文件，为了编辑方便，可以下载一个<a href="https://notepad-plus-plus.org/download/v7.5.4.html" target="_blank" rel="noopener">Notepad++</a>,<br>一般是在_config.yml最下方，添加如下配置<br><figure class="highlight less"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line"><span class="attribute">deploy</span>:</span><br><span class="line"> <span class="attribute">type</span>: git</span><br><span class="line"> <span class="attribute">repository</span>: <span class="attribute">http</span>:<span class="comment">//github.com/username/blog.github.io.git</span></span><br><span class="line"> <span class="attribute">branch</span>: master</span><br></pre></td></tr></table></figure></p><blockquote><p>每个<code>:</code>后必须带一个空格<br>repository后的<code>username</code>为GitHub用户名，第二个为之前创建的Repository的名字，记得修改为自己的。上面提到创建repository时填写Repository name要加个<code>.github.io</code>我一开始没加，自然这边也就没加，导致部署到GitHub page上后打开我的远程博客时报404，折腾了一会儿，在这边添加了这个之后问题解决，这还是因为对github不够了解，惭愧。</p></blockquote><p>配置好之后执行以下代码<br><figure class="highlight verilog"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">$ hexo <span class="keyword">generate</span> (或者输入 hexo g)</span><br><span class="line">$ hexo deploy (或者输入 hexo d)</span><br></pre></td></tr></table></figure></p><p>上面两行也可简写为<br><figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">$</span><span class="bash"> hexo g -d</span></span><br></pre></td></tr></table></figure></p><p>到目前，博客已经算是搭建完成了，而且也已经发布到GitHub上，别人也可以访问得到了。在浏览器上访问<code>http:\\username.github.io</code>就能看到自己的博客了。</p><blockquote><p>tips：1.这边的username并非我的GitHub帐户名，我只是举个例子，你们将username改为你自己的GitHub帐户名即可<br>2.每次部署到GitHub上之后，可能要过一会儿才能显示最新的页面。即：输入完<code>hexo deploy</code>之后。建议一开始调试页面的时候在本地服务器上操作，可节省时间。 </p></blockquote><p><br></p><blockquote><p>提示：每次部署前最好先clean<br>步骤如下 </p></blockquote><figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">$</span><span class="bash"> hexo clean</span></span><br><span class="line"><span class="meta">$</span><span class="bash"> hexo generate</span></span><br><span class="line"><span class="meta">$</span><span class="bash"> hexo deploy</span></span><br></pre></td></tr></table></figure><h2 id="两个配置文件及主题更改"><a href="#两个配置文件及主题更改" class="headerlink" title="两个配置文件及主题更改"></a><font color="#0099ff">两个配置文件及主题更改</font></h2><p>在本地博客目录下有两个配置文件，分别是</p><ul><li>E:\hexo_config.yml</li><li>E:\hexo\themes\landscape_config.yml </li></ul><p>第二个为博客主题的配置文件，若想换成自己喜欢的主题可以去网上找一些主题（这里推荐几个不错的<a href="https://www.zhihu.com/question/24422335" target="_blank" rel="noopener">主题</a>），把主题源码下载下来，然后将整个文件夹粘贴到<code>E:\hexo\themes</code>下，然后编辑第一个配置文件，找到<code>theme:</code>字段，将后面的landscape改为刚刚添加的主题文件夹名<br>第一个配置文件中第一部分，Site部分，需要修改为你个人的信息，其他没提到的暂时可以使用默认的，若想修改的更加个性化可以自己再研究，可以参考<a href="https://hexo.io/zh-cn/docs/index.html" target="_blank" rel="noopener">Hexo文档</a>，博主觉得这些已经够用了，找个喜欢的主题就差不多了，所以也没有深究。<br><figure class="highlight dts"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta"># Site<span class="comment">//这下面的几项配置都很简单，基本都能明白什么意思及用途</span></span></span><br><span class="line"><span class="symbol">title:</span> Chillax blog <span class="comment">//博客名</span></span><br><span class="line"><span class="symbol">subtitle:</span> Goals determine what you are going to be<span class="comment">//副标题</span></span><br><span class="line"><span class="symbol">description:</span> Goals determine what you are going to be <span class="comment">//用于搜索，没有直观表现</span></span><br><span class="line"><span class="symbol">author:</span> DouDo<span class="comment">//作者</span></span><br><span class="line"><span class="symbol">language:</span> zh-CN<span class="comment">//语言</span></span><br><span class="line"><span class="symbol">timezone:</span> <span class="comment">//时区，此处不填写，hexo会以你目前电脑的时区为默认值</span></span><br></pre></td></tr></table></figure></p><p>第二个配置文件是根据主题而来，找到你喜欢的主题时，仔细看一下相关文档进行相应的修改即可。</p><h2 id="最后"><a href="#最后" class="headerlink" title="最后"></a><font color="#0099ff">最后</font></h2><p>原本打算也整理出评论添加和域名绑定的相关文档，评论区引用有好多，目前比较推荐使用的是：Disqus和gitment,评论添加也很简单，我这边只稍微说一点，先推荐一个<a href="https://www.jianshu.com/p/c4f65ebe23ad" target="_blank" rel="noopener">教程</a></p><blockquote><p>他里面具体到添加多说代码块儿，你们添加时注意看下你们所找的主题，有的主题里可能已经配置好了，只需要你修改下配置文件里参数值。</p></blockquote><p>至于域名，其实是可有可无的，自己有个域名可能会显得更加高大上些，这当中其实没多少要配置的，主要就是购买域名和域名解析，网上的域名绑定都大同小异，很容易搞定。</p><h1 id="结语"><a href="#结语" class="headerlink" title="结语"></a>结语</h1><p>其实，一开始想写个很详细的教程，后来又想，网上已经有很多教程了，总结来总结去也就这些。虽然本人也是第一次建博客，不过搭建时也没遇到啥大的坑，比较顺利。所以，觉得没啥好讲的。写它也是因为自己在博客初篇中提到以后会写个搭建教程，自己挖的坑哭着也要填完T.T<br>就当练一练mackdown文本编辑吧。<br>有错误欢迎指出！</p>]]></content>
<summary type="html">
<h1 id="前言"><a href="#前言" class="headerlink" title="前言"></a>前言</h1><p>前两天刚刚搭建好这个博客，想着趁热乎，脑中还记得一些搭建时需要在意的注意点啥的。于是，便有了下文。只是希望能够给以后想自己搭建博客的人一点微不足道的帮助。有什么不对的地方可以留言告诉我。</p>
</summary>
<category term="Note" scheme="http://www.regularmisu.com/categories/Note/"/>
<category term="hexo" scheme="http://www.regularmisu.com/tags/hexo/"/>
</entry>
<entry>
<title>开幕</title>
<link href="http://www.regularmisu.com/2017/12/29/%E5%BC%80%E5%B9%95/"/>
<id>http://www.regularmisu.com/2017/12/29/开幕/</id>
<published>2017-12-29T08:33:13.000Z</published>
<updated>2018-01-11T10:21:55.801Z</updated>
<content type="html"><![CDATA[<p>在朋友<a href="https://github.com/buyongfeng521" target="_blank" rel="noopener">buyongfeng</a>（下文中的大哥）的推荐和帮助下，折腾了一天多终于算是搭建好了。以后或许可能会换Theme，又或者懒得动自己选择性的优化一下页面吧。</p><a id="more"></a><p>由于我是一枚java后端猿，所以我对页面没改动什么，也是惭愧。之后我会整理出一篇搭建此博客的流程，希望可以给以后想搭建个人博客的朋友一点小小的帮助。</p><blockquote><p>建博客的念头起源 </p></blockquote><p>我只是一个在csdn上有个个人账号的java后端小白，原本打算就在csdn上好好弄个博客。然而这段时间经常看别人博客，在众多IT前辈的博客里畅游，寻找我想要的答案，从没有想过自己也有个属于自己个人的博客。就在前天晚上下班之前，看到我大哥（我的朋友也是同事更是前辈）的github主页，他也是好久没有打理了，然后找到他的博客，看到一篇《<a href="http://blog.step520.com/2016/12/05/Hexo%E5%9C%A8GitHub%E6%90%AD%E5%BB%BA%E5%8D%9A%E5%AE%A2/" target="_blank" rel="noopener">Hexo在GitHub搭建博客</a>》这才让我也想搭建一个属于自己的博客。</p><blockquote><p>感想 </p></blockquote><p>当我第一次看到我在GitHub page上搭建出来的博客雏形的时候，心里有种说不出来的感觉，在我购买了域名之后，我的博客的地址是以www开头com结尾的心里又是另一番情绪。都说：一入编程深似海，从此妹子是路人。此时的心情仅次于你拥有一个女朋友的时候，所以你懂的。 </p><p>作为一个90后，用过空间，微博，微信，人人等等，每一款都可以有一块属于自己的小天地，可以记录自己生活中的点点滴滴。而这个不一样，他是一块完全属于我自己的天地，作为码农，我希望他一天天的壮大，他的壮大代表着我的壮大，我会用我接下来的人生来点缀他，让他变得博学多才，五彩斑斓。 </p><p>最重要的是，我是一个跨专业转行过来的，个人对IT行业也是非常的感兴趣，这让我以后可以在我那些老同学面前装X，哈哈。（开个玩笑）</p><p>^ _ ^</p><blockquote><p>感谢 </p></blockquote><p>最后<br>感谢我亦师亦友的大哥<br>感些模板提供者<a href="https://github.com/MOxFIVE" target="_blank" rel="noopener">MOxFIVE</a></p>]]></content>
<summary type="html">
<p>在朋友<a href="https://github.com/buyongfeng521" target="_blank" rel="noopener">buyongfeng</a>（下文中的大哥）的推荐和帮助下，折腾了一天多终于算是搭建好了。以后或许可能会换Theme，又或者懒得动自己选择性的优化一下页面吧。</p>
</summary>
<category term="Essay" scheme="http://www.regularmisu.com/categories/Essay/"/>
</entry>
</feed>