org.json的用法

闲话少说，通过实例简单介绍一下org.json的用法，用到的jar包是json-20090211.jar

package com.ilucky.util.orgjson;

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

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

/**
 * @author IluckySi
 * @since 20150407
 */
public class OrgjsonUtil {

	public static void main(String[] args) {
		try {
			//JSONObject的用法.
			System.out.println("-----test1-----");
			testJsonObject();
			
			//JSONArray的用法.
			System.out.println("-----test2-----");
			testJsonArray();
			
			//JSONObject,JSONArray和集合的复杂用法.
			System.out.println("-----test3-----");
			testComplex();
		} catch (Exception e) {
			System.out.println("测试发生异常: " + e);
		}
	}
	
	public static void testJsonObject() throws JSONException {
		JSONObject jo = new JSONObject();
		jo.put("username", "IluckySi");
		jo.put("age", 27);
		jo.put("sex", true);
		Map<String, String> skill = new HashMap<String, String>();
		skill.put("java", "不错");
		skill.put("javascript", "凑合");
		skill.put("jquery", "挺好");
		jo.put("skill", skill);
		String username = jo.getString("username");
		int age = jo.getInt("age");
		boolean sex = jo.getBoolean("sex");
		JSONObject skill2 = new JSONObject(jo.getString("skill"));
		System.out.println(username + ", 年龄 = " + age + ", 性别 = " + (sex == true ? "男" : "女") + ", 技能如下:");
		String[] names = JSONObject.getNames(skill2);
		for(String name : names) {
			System.out.println(name + ": " + skill2.getString(name));
		}
	}
	
	public static void testJsonArray() throws JSONException {
		JSONArray ja = new JSONArray();
		JSONObject jo = new JSONObject();
		jo.put("username", "IluckySi");
		jo.put("age", 27);
		jo.put("sex", true);
		ja.put(jo);
		JSONObject jo2 = new JSONObject();
		jo2.put("username", "IluckySi2");
		jo2.put("age", 28);
		jo2.put("sex", false);
		ja.put(jo2);
		for(int i = 0; i < ja.length(); i++) {
			JSONObject j = (JSONObject)ja.get(i);
			String username = j.getString("username");
			int age = j.getInt("age");
			boolean sex = j.getBoolean("sex");
			System.out.println(username + ", 年龄 = " + age + ", 性别 = " + (sex == true ? "男" : "女"));
		}
		
	}
	
	public static void testComplex() throws JSONException {
		JSONObject jo = new JSONObject();
		jo.put("username", "IluckySi");
		jo.put("age", 27);
		jo.put("sex", true);
		Map<Object, Object> message = new HashMap<Object, Object>();
		message.put("result", "success");
		message.put("message", "测试");
		List<Map<Object, Object>> list = new ArrayList<Map<Object, Object>>();
		Map<Object, Object> user1 = new HashMap<Object, Object>();
		user1.put("name", "name1");
		user1.put("password", "password1");
		list.add(user1);
		Map<Object, Object> user2 = new HashMap<Object, Object>();
		user2.put("name", "name1");
		user2.put("password", "password1");
		list.add(user2);
		message.put("users", list);
		jo.put("message", message);
		String send = jo.toString();
		System.out.println("要测试的消息" + send);
		send(send);
	}
	
	private static void send(String send) throws JSONException {
		JSONObject jo = new JSONObject(send);
		String username = jo.getString("username");
		int age = jo.getInt("age");
		boolean sex = jo.getBoolean("sex");
		JSONObject u2 = new JSONObject(jo.getString("message"));
		String result = u2.getString("result");
		String message = u2.getString("message");
		System.out.println(username + ", 年龄 = " + age + ", 性别 = " + (sex == true ? "男" : "女") + ", result=" + result
				+ ", message =" + message);
		String users = u2.getString("users");
		JSONArray ja = new JSONArray(users);
		for(int i = 0; i < ja.length(); i++) {
			JSONObject j = (JSONObject)ja.get(i);
			String name = j.getString("name");
			String password = j.getString("password");
			System.out.println("name = " + name + ", password = " + password);
		}
	}
}

/**
输出结果:
-----test1-----
IluckySi, 年龄 = 27, 性别 = 男, 技能如下:
javascript: 凑合
java: 不错
jquery: 挺好
-----test2-----
IluckySi, 年龄 = 27, 性别 = 男
IluckySi2, 年龄 = 28, 性别 = 女
-----test3-----
要测试的消息{"message":{"message":"测试","result":"success","users":[{"name":"name1","password":"password1"},{"name":"name1","password":"password1"}]},"sex":true,"username":"IluckySi","age":27}
IluckySi, 年龄 = 27, 性别 = 男, result=success, message =测试
name = name1, password = password1
name = name1, password = password1
*/