如果要将数组、对象、Map、List转换成JSON数据

如果要将数组、对象、Map、List转换成JSON数据,那我们需要一些jar包:

json-lib-2.4-jdk15.jar

ezmorph-1.0.6.jar

commons-logging.jar

commons-lang.jar

commons-collections.jar

commons-beanutils.jar

  1. 将数组转换为JSON:

    String[] arr = {"asd","dfgd","asd","234"};

    JSONArray jsonarray = JSONArray.fromObject(arr);

    System.out.println(jsonarray);

  2. 对象转换成JSON:

    UserInfo user = new UserInfo(1001,"张三");

    JSONArray jsonArray = JSONArray.fromObject(user);  

    System.out.println( jsonArray );  

  3. 把Map转换成json, 要使用jsonObject对象:

    Map map = new HashMap();

    map.put("userId", 1001);

    map.put("userName", "张三");

    map.put("userSex", "男");

    JSONObject jsonObject = JSONObject.fromObject(map);

    System.out.println(jsonObject);

  4.  把List转换成JSON数据:

    List list = new ArrayList();

    UserInfo user = new UserInfo(1001, "张三");

    list.add(user);

    list.add(user);

    list.add(user);

    JSONArray jsonArray = JSONArray.fromObject(list);

    System.out.println(jsonArray);

    END

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