实现JavaBean和json之间的相互转换

来源：互联网发布：带租约商铺知乎编辑：程序博客网时间：2024/05/22 01:44

使用json-lib组件实现
*    需要
*     json-lib-2.4-jdk15.jar
*     ezmorph-1.0.6.jar
*     commons-collections-3.1.jar
*     commons-lang-2.0.jar

支持

UserInfos实体类

private String id;private String name;..get/set

LoginAccount实体类

private String id;private String account;private UserInfos userInfos;..get/set

javaBean转换为Json

//创建LoginAccount对象的集合          List<LoginAccount> listJson=new ArrayList<LoginAccount>();          //制作数据          LoginAccount lAccount1=new LoginAccount();        lAccount1.setId("L001");        lAccount1.setAccount("xiaoMing");    UserInfos userInfos1=new UserInfos();      userInfos1.setId("001");      userInfos1.setName("小明");    lAccount1.setUserInfos(userInfos1);        LoginAccount lAccount2=new LoginAccount();    lAccount2.setId("L002");    lAccount2.setAccount("xiaoHong");    UserInfos userInfos2=new UserInfos();      userInfos2.setId("002");      userInfos2.setName("小红");      lAccount2.setUserInfos(userInfos2);        LoginAccount lAccount3=new LoginAccount();    lAccount3.setId("L003");    lAccount3.setAccount("xiaoHei");    UserInfos userInfos3=new UserInfos();      userInfos3.setId("003");      userInfos3.setName("小黑");      lAccount3.setUserInfos(userInfos3);        //添加数据      listJson.add(lAccount1);      listJson.add(lAccount2);      listJson.add(lAccount3);          //将List转换为JSON          JSONArray jsonArray=JSONArray.fromObject(listJson);          //输出JSON字符串        System.out.println(jsonArray.toString());

json转换为javaBean

//创建JSON字符串String loginAccountJSON="[{id:\"L0001\",account:\"xiaoMing\",userInfos:{id:\"U0001\",name:\"小明\"}},{id:\"L0001\",account:\"xiaoHong\",userInfos:{id:\"U0002\",name:\"小红\"}},{id:\"L0001\",account:\"xiaoHei\",userInfos:{id:\"U0003\",name:\"小黑\"}}]";//创建JSON对象JSONArray jsonArrays = (JSONArray) JSONSerializer.toJSON(loginAccountJSON);//设置list集合List list=(List) JSONSerializer.toJava(jsonArrays);//遍历for(Object object:list){JSONObject jsonObject = JSONObject.fromObject(object);LoginAccount loginAccount = (LoginAccount) JSONObject.toBean(jsonObject,LoginAccount.class);//输出获得的LoginAccount实体类的数据System.out.println("id="+loginAccount.getId()+";account="+loginAccount.getAccount()+";userInfo.id="+loginAccount.getUserInfos().getId()+";userInfo.name="+loginAccount.getUserInfos().getName());}