最近，在写一个网站的后台管理，用到异步通讯技术，用的方法是JSON数据传送方式

需要下面几个jar文件

然后，自己写了一点点常用代码

Java的List和数组要用JSONArray对象

Map和实体用JSONObject

package com.demo;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

import com.trade.entity.Users;

public class TestJSON {
	public static void main(String[] args) {
		Users users = new Users();
		users.setId(0);
		users.setUname("admin");
		users.setPwd("admin");

		Users users1 = new Users();
		users1.setId(1);
		users1.setUname("admin1");
		users1.setPwd("admin1");

		List<Users> list = new ArrayList<Users>();
		list.add(users);
		list.add(users1);

		// shitiduixiang {"id":1,"pwd":"admin1","uname":"admin1"}
		// JSONObject jsonObject = JSONObject.fromObject(users);
		// System.out.println(jsonObject.toString());

		// [{"id":1,"pwd":"admin1","uname":"admin1"},{"id":0,"pwd":"","uname":""}]
		// list
		// JSONArray array = JSONArray.fromObject(list);
		// System.out.println(array.toString());

		// {"total":2,"rows":[{"id":0,"pwd":"admin","uname":"admin"},{"id":1,"pwd":"admin1","uname":"admin1"}]}
		// 自己定义
		// JSONObject jsonObject = new JSONObject();
		// jsonObject.put("total", 2);
		// jsonObject.put("rows", list);
		// System.out.println(jsonObject.toString());

		// {"id":"0","pwd":"wjj","admin":"wjj"}
		Map<String, String> map = new HashMap<String, String>();
		map.put("id", "0");
		map.put("admin", "wjj");
		map.put("pwd", "wjj");
		JSONObject jsonObject = JSONObject.fromObject(map);
		System.out.println(jsonObject.toString());
	}
}

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蜗牛—JSON学习之Java转化