alternateNames别名解析失效问题

[zsh2722]

json数据:{
"name": "我为你牺牲",
"name_py": "wwnxs",
"poster": "我为你牺牲.png",
"poster_m": "474fa7396030024028c27feab459e2c9.png",
"filename": "我为你牺牲.ts",
"filename_m": "474fa7396030024028c27feab459e2c9.ts",
"desc": "影片《挚爱无悔》根据三个武警部队真实人物故事改编：战斗在缉毒一线的王强“卧底”制毒工厂，凭借过硬的军事技能和强大的心理素质，排爆，制服毒枭，铲除制毒窝点；军属庄小红默默支持丈夫多年驻守高原山口，而探亲过程中她却遭遇车祸截肢，为确保能生下健康的军人后代，忍痛不打麻药进行手术。术后依然自强自立；援疆战士王报国身患癌症，多次申请援疆执行任务，最后重症不治牺牲，留下“来生再报国”的遗愿，用生命诠释“为你牺牲”这一主题。通过三个平行的篇章，《挚爱无悔》全景展现了武警部队官兵以小家保祖国大家的奉献故事。"
},
{
"name": "打过长江去",
"name_py": "dgzjq",
"poster": "打过长江去.png",
"poster_m": "1a17d6986b0456df117f9a216485a2b8.png",
"filename": "打过长江去.ts",
"filename_m": "1a17d6986b0456df117f9a216485a2b8.ts",
"desc": "《打过长江去》以渡江战役为背景，再现了新中国成立前的关键时刻，人民解放军一支先遣分队潜入江南，打进虎穴斗智斗勇，命悬一线却与各种敌人殊死斗争，为祖国统一而舍生取义、无私拼搏，最终配合百万大军过长江，将红旗插遍中国。"
}

java bean:package com.thunder.base.framework.model;

import androidx.annotation.NonNull;
import androidx.room.Entity;
import androidx.room.Ignore;
import androidx.room.PrimaryKey;
import androidx.room.TypeConverters;

import com.alibaba.fastjson.annotation.JSONField;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.thunder.base.framework.db.converter.MediaItemConverter;

import java.io.Serializable;
import java.util.List;

/**

• Created by zhangsonghe on 2024/1/27

• @author THUNDER

• @Date 2024/1/27

• @desc
  */
  @entity(tableName = "mix_media")
  public class MediaEntity implements Serializable {
  @PrimaryKey
  @nonnull
  private String name = "";
  @JSONField(name = "name_py")
  private String firstLetter;
  @JSONField(name = "poster_m",alternateNames = {"poster"})
  private String poster;
  private String performer;
  @JSONField(name = "filename_m",alternateNames = {"filename"})
  private String filename;
  private String desc;
  @TypeConverters(MediaItemConverter.class)
  @JSONField(name = "sub_list")
  private List itemList;

  @JsonIgnore
  private String catalog;
  @JsonIgnore
  private String dir;
  @ignore
  private int playIndex;
  @ignore
  private int playPosition;
  @ignore
  private int playDuration;
  @JsonIgnore
  @ignore
  private int playState;
  @ignore
  private String projectionType;
  @JsonIgnore
  @ignore
  private String localFile;

  @JsonIgnore
  private int collectState;
  // 下载状态
  @JsonIgnore
  private int downloadState;

  // 下载进度（0-100）
  @JsonIgnore
  private int downloadProgress;

  public String getName() {
  return name;
  }

  public void setName(String name) {
  this.name = name;
  }

  public String getFirstLetter() {
  return firstLetter;
  }

  public void setFirstLetter(String firstLetter) {
  this.firstLetter = firstLetter;
  }

  public String getPoster() {
  return poster;
  }

  public void setPoster(String poster) {
  this.poster = poster;
  }

  public String getPerformer() {
  return performer;
  }

  public void setPerformer(String performer) {
  this.performer = performer;
  }

  public String getFilename() {
  return filename;
  }

  public void setFilename(String filename) {
  this.filename = filename;
  }

  public String getDesc() {
  return desc;
  }

  public void setDesc(String desc) {
  this.desc = desc;
  }

  public List getItemList() {
  return itemList;
  }

  public void setItemList(List itemList) {
  this.itemList = itemList;
  }

  public int getPlayIndex() {
  return playIndex;
  }

  public void setPlayIndex(int playIndex) {
  this.playIndex = playIndex;
  }

  public int getPlayPosition() {
  return playPosition;
  }

  public void setPlayPosition(int playPosition) {
  this.playPosition = playPosition;
  }

  public int getPlayDuration() {
  return playDuration;
  }

  public void setPlayDuration(int playDuration) {
  this.playDuration = playDuration;
  }

  public int getPlayState() {
  return playState;
  }

  public void setPlayState(int playState) {
  this.playState = playState;
  }

  public String getProjectionType() {
  return projectionType;
  }

  public void setProjectionType(String projectionType) {
  this.projectionType = projectionType;
  }

  public String getLocalFile() {
  return localFile;
  }

  public void setLocalFile(String localFile) {
  this.localFile = localFile;
  }

  public String getCatalog() {
  return catalog;
  }

  public void setCatalog(String catalog) {
  this.catalog = catalog;
  }

  public String getDir() {
  return dir;
  }

  public void setDir(String dir) {
  this.dir = dir;
  }

  public int getCollectState() {
  return collectState;
  }

  public void setCollectState(int collectState) {
  this.collectState = collectState;
  }

  public int getDownloadState() {
  return downloadState;
  }

  public void setDownloadState(int downloadState) {
  this.downloadState = downloadState;
  }

  public int getDownloadProgress() {
  return downloadProgress;
  }

  public void setDownloadProgress(int downloadProgress) {
  this.downloadProgress = downloadProgress;
  }

  @OverRide
  public String toString() {
  return "MediaEntity{" + "name='" + name + ''' + ", firstLetter='" + firstLetter + ''' + ", poster='" + poster + ''' + ", performer='" + performer + ''' + ", filename='" + filename + ''' + ", desc='" + desc + ''' + ", playIndex=" + playIndex + ", playPosition=" + playPosition + ", playDuration=" + playDuration + ", playState=" + playState + ", projectionType='" + projectionType + ''' + ", localFile='" + localFile + ''' + ", itemList=" + itemList + '}';
  }
  }
  json解析后打印:MediaEntity{name='我为你牺牲', firstLetter='wwnxs', poster='http://192.168.1.1/mnt/sda1//movie_tv/movie/474fa7396030024028c27feab459e2c9.png', performer='null', filename='http://192.168.1.1/mnt/sda1//movie_tv/movie/我为你牺牲.ts', desc='影片《挚爱无悔》根据三个武警部队真实人物故事改编：战斗在缉毒一线的王强“卧底”制毒工厂，凭借过硬的军事技能和强大的心理素质，排爆，制服毒枭，铲除制毒窝点；军属庄小红默默支持丈夫多年驻守高原山口，而探亲过程中她却遭遇车祸截肢，为确保能生下健康的军人后代，忍痛不打麻药进行手术。术后依然自强自立；援疆战士王报国身患癌症，多次申请援疆执行任务，最后重症不治牺牲，留下“来生再报国”的遗愿，用生命诠释“为你牺牲”这一主题。通过三个平行的篇章，《挚爱无悔》全景展现了武警部队官兵以小家保祖国大家的奉献故事。', playIndex=0, playPosition=0, playDuration=0, playState=0, projectionType='null', localFile='null', itemList=null}

问题:json中定了两个字段,分别是poster/poster_m,filename/filename_m,java实体类中定义了poster并通过name匹配json中的poster,配置了别名为poster_m作为备选字段,filename同理,但是实际运行中poster能获取到正确的值(poster_m),filename却不能,不知道是用法不对还是哪里出的问题