java语言解析json以后加入到listlist集合中，用代码应该怎么实现？可以举个例子吗_java 解析json参数放到list里面

import java.util.ArrayList;

import java.util.List;

import net.sf.json.JSONObject;

public class Test {

private int userid;

private String userName;

public int getUserid() {

return userid;

}

public void setUserid(int userid) {

this.userid = userid;

}

public String getUserName() {

return userName;

}

public void setUserName(String userName) {

this.userName = userName;

}

public static void main(String[] args) {

JSONObject jo=new JSONObject();

jo.put("userid", 1);

jo.put("userName", "张三");

Test test=new Test();

test.setUserid(Integer.parseInt(jo.get("userid").toString()));

test.setUserName(jo.get("userName").toString());

List<Test> list=new ArrayList<Test>();

list.add(test);

System.out.println(jo);

}

}

//多组JSON对象就循环add。