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<div id="js-aboutme">DouDo,<br>毕业于扬州大学<br>目前是一枚java后端程序员<br><br>一个人，<br>生活规律，吃饭工作<br>偶尔想家，偶尔...<br><br></div>
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<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>
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<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>
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<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
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<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
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<p>笔记整理</p>
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<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>
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<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>
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<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>
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<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>
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