JsonObject to JSONARRAY

JSONArray data = JSONArray.parseArray(reqMap.get("userListDto").toString());

JSONObject jsonObj = JSONObject.fromObject(resultMap.get("data"));

JSONArray certArray = JSONArray.fromObject(jsonObj.get("userListDto"));

String jsonentity = json.tojsonstring ("Data needed");
JSONObject jsonObject = JSONObject.parseObject(jsonEntity);
JSONArray jsonArray =  jsonObject.getJSONArray("userListDto");

Jsonarray to list object

The first object parameter

{"userList":[{
     "name": "zhangsan",
     "sex": 1,
     "age":10,
     "level": 1
},{
     "name": "lisi",
     "sex": 1,
     "age":13,
     "level": 4
},{
     "name": "wangwu",
     "sex": 1,
     "age":12,
     "level": 3
}
]}

 Use Fastjson's jar package

<dependency>

<groupld>com.alibaba</groupld>

<artifactld>fastjson</artifactld>

</dependency>

import com.alibaba.fastjson.JSONObject;

JSONObject jsonObj = JSONObject.parseObject(jsonObject);
String userStr = jsonObj.getString("userList");
 // array
List<User> inventoryDTOs = JSON.parseArray(userStr, User.class);
 // object
User user = JSON.parseObject(xx,User.class);

The second JSON array parameter

[{
"name": "zhangsan",
"sex": 1,
"age": 15,
"level": 6
}]

<dependency>
<groupld>net.sf.json-lib</groupld>
<artifactld>json-lib</artifactld>
<version>2.4</version>
<classifier>jdk15</classifier>
</dependency>

import net.sf.json.JSONArray;
import net.sf.json.JsonConfig;

public static void main(String[] args){
    // json to jsonarry
    JSONArray jsonArray = JSONArray.fromObject(string);
         // jsonarry transition object list
    List<User> todos = JSONArray.toList(jsonArray, new User() , new JsonConfig());
}

Below is JSONObject turning the body object, using the jar package of Fastjson

User user = JSONObject.toJavaObject(userDto,User.class);
User user = JSON.toJavaObject(userDto,User.class);