// 将Json字符串通过fastjson转为JSONObject对象

JSONObject jsonObject = JSONObject.parseObject(userJson);

// 将JSONObject对象转为Object实体对象

UserBean user = JSON.toJavaObject(jsonObject, UserBean.class);

JSONObject jsonObject = (JSONObject) JSONObject.toJSON(new UserBean());

 List list = new ArrayList(16);

JSONObject result = JSONObject.parseObject(JSONObject.toJSONString(list));

//将对象转换成为字符串

String strUserInfo = JSON.toJSONString(UserInfo);

//字符串转换成为对象

InfoDo UserInfo = JSON.parseObject(strUserInfo, UserInfo.class);

//将对象集合转换成为字符串

String users = JSON.toJSONString(users);

//将字符串转换成为对象集合

 List userList = JSON.parseArray(userStr, User.class);

//String 转 Json对象

JSONObject jsonObject = JSONObject.parseObject(str);

//json对象转string

String jsonString = jsonObject.toJSONString();// jsonObject为JSON对象

//字符串转jsonObject

JSONObject  jsonObject = JSONObject.parseObject(str);

//json对象转Map

 Map<String,Object> map = (Map<String,Object>)jsonObject;

 //map转字符串

String jsonString = JSON.toJSONString(map);

//map转json对象

Map<String,Object> map = new HashMap<>();

map.put("age", 23);

map.put("name", "Jacky");

JSONObject json = new JSONObject(map);

//json对象转Map

Map<String,Object> map = (Map<String,Object>)jsonObject;

/**

* 将List<map>转换成List<java对象>

* */

public static <T> List<T> getListObject(List<Map<String,Object>> list,Class<T> cls){

     List<T> paramList = new ArrayList<>();

     if (CollectionUtils.isNotEmpty(list)){

        for (Map<String, Object> map : list) {

             paramList.add(this.parseMapObject(map,cls));

        }

     }

     return paramList;

}

/**

* 将map转换成java对象

* */

public static <T> T parseMapObject(Map<String,Object> paramMap, Class<T> cls) {

    return JSONObject.parseObject(JSONObject.toJSONString(paramMap),cls);

}

String review = "[

{

"name":"人员A",

"review_grades":{

"name":"优秀",

"parent":"-1","key":"1"},

"remark":"XXX今年XXX获得优秀党员称号"},

{

"name":"人员B",

"review_grades":{

"name":"合格",

"parent":"-1","key":"2"},

"remark":"表现良好"}]";

JSONArray tableData = JSONArray.parseArray(review);

List<DemocracyReviewVO> ls = arr.toJavaList(DemocracyReviewVO.class);