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

<pre name="code" class="java">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;/** * 重点:JSONObject对应集合Map,JSONArray对应集合List. * 用json类(fastjson和orgjson)库处理复杂的集合时,要将集合直接放到value处,不能将其转换为json字符串放到value处, * 如果将其转换为字符串放到value处,最终生成的json字符串会带有转义字符. * @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();//JSONObject,JSONArray和集合的复杂用法.System.out.println("-----test4-----");testComplex2();} 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("result", "success");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", "name2");user2.put("password", "password2");list.add(user2);jo.put("message", list);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 result = jo.getString("result");System.out.println("result=" + result);JSONArray ja = new JSONArray(jo.getString("message"));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);}}public static void testComplex2() throws JSONException {JSONObject jo = new JSONObject();jo.put("result", "success");JSONObject message = new JSONObject();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", "name2");user2.put("password", "password2");list.add(user2);message.put("message", list);jo.put("message", message.toString());//注意:如果直接写message,也不会有转义字符.String send = jo.toString();System.out.println("要测试的消息" + send);send2(send);}private static void send2(String send) throws JSONException {JSONObject jo = new JSONObject(send);String result = jo.getString("result");System.out.println("result=" + result);JSONObject message = new JSONObject(jo.getString("message"));JSONArray message2 = new JSONArray(message.getString("message"));for(int i = 0; i < message2.length(); i++) {JSONObject j = (JSONObject)message2.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":[{"name":"name1","password":"password1"},{"name":"name2","password":"password2"}],"result":"success"}result=successname = name1, password = password1name = name2, password = password2-----test4-----要测试的消息{"message":"{\"message\":[{\"name\":\"name1\",\"password\":\"password1\"},{\"name\":\"name2\",\"password\":\"password2\"}]}","result":"success"}result=successname = name1, password = password1name = name2, password = password2*/