public static void main(String[] args) {

		/*普通对象与json相互转换*/

		User u = new User("miquan", "000");

		//{"@type":"testjava.User","password":"000","userName":"miquan"}

		String jsonUser = JSON.toJSONString(u, SerializerFeature.WriteClassName);

		System.out.println(jsonUser);

		User user = JSON.parseObject(jsonUser, User.class);

		/*带集合的对象与json字符串相互转换*/

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

		list.add("miquan");

		list.add("qiantu");

		Download d = new Download();

		d.setEmojiSetName("guoqiao");

		d.setEmojiPathList(list);

		//{"@type":"testjava.Download","emojiPathList":["miquan","qiantu"],"emojiSetName":"guoqiao"}

		String jsonList = JSON.toJSONString(d, SerializerFeature.WriteClassName);

		System.out.println(jsonList);

		Download download = JSON.parseObject(jsonList, Download.class);

		/*json与List对象相互转换*/

		List<User> listUser = new ArrayList<User>();

		listUser.add(new User("liangguoqiao", "iloveyou"));

		listUser.add(new User("liangguoqiao", "iloveyou"));

		//[{"password":"iloveyou","userName":"liangguoqiao"},

		//{"password":"iloveyou","userName":"liangguoqiao"}]

		String json = JSON.toJSONString(listUser);

		System.out.println(json);

		List<User> users = JSON.parseArray(json, User.class);

	}

注意：1、下载地址

2、User和Download等实体类必须加入空的构造函数

3、转为JSON字符串的时候加上SerializerFeature.WriteClassName

4、坐等下班。。。

package com.yangshidesign.weixinface.bean;

import java.util.List;

public class Download {

	private String emojiSetName;

	/** 表情图片名字 */

	private List<String> emojiNameList;

	public Download() {

		super();

	}

	public String getEmojiSetName() {

		return emojiSetName;

	}

	public void setEmojiSetName(String emojiSetName) {

		this.emojiSetName = emojiSetName;

	}

	public List<String> getEmojiNameList() {

		return emojiNameList;

	}

	public void setEmojiNameList(List<String> emojiNameList) {

		this.emojiNameList = emojiNameList;

	}

}

package testjava;

public class User {

	private String userName;

	private String password;

	public User() {

		super();

	}

	public User(String userName, String password) {

		super();

		this.userName = userName;

		this.password = password;

	}

	public String getUserName() {

		return userName;

	}

	public void setUserName(String userName) {

		this.userName = userName;

	}

	public String getPassword() {

		return password;

	}

	public void setPassword(String password) {

		this.password = password;

	}

}