package com.alibaba.fastjson;import java.util.Date;import java.util.List;import com.alibaba.fastjson.componet.Grade;import com.alibaba.fastjson.componet.User;import com.alibaba.fastjson.serializer.SerializerFeature;/** * @author Liang * *         2017年2月27日 */public class JSONObject_ {    public static void main(String[] args) {        User lime = new User(1, "lime", 23d);        User oracle = new User(2, "oracle", 25d);        Grade grade = new Grade("铃兰一中", lime, oracle);        // 将JavaBean序列化为JSON文本        String limeJson = JSONObject.toJSONString(lime);//        {"id":1,"name":"lime","treasure":23}        String usersJson = JSONObject.toJSONString(grade.getUsers());//        [{"id":1,"name":"lime","treasure":23},{"id":2,"name":"oracle","treasure":25}]        String gradeJson = JSONObject.toJSONString(grade);//        {"name":"铃兰一中","users":[{"id":1,"name":"lime","treasure":23},{"id":2,"name":"oracle","treasure":25}]}        // JSONObject 其实就是一个Map。        JSONObject limeParse = JSONObject.parseObject(limeJson);        System.out.println(limeParse);//        {"id":1,"name":"lime","treasure":23}        System.out.println(limeParse.getInteger("id"));//        1        System.out.println(limeParse.getIntValue("id"));//        1        System.out.println(limeParse.getString("name"));//        lime        JSONObject gradeParse = JSONObject.parseObject(gradeJson);        System.out.println(gradeParse);//        {"name":"铃兰一中","users":[{"id":1,"name":"lime","treasure":23},{"id":2,"name":"oracle","treasure":25}]}        System.out.println(gradeParse.get("users"));//        [{"id":1,"name":"lime","treasure":23},{"id":2,"name":"oracle","treasure":25}]        // JSONArray 其实就是一个List        List
     
       gradeUsersParse = JSONObject.parseArray(gradeParse.get("users").toString(), User.class);        for(User user : gradeUsersParse){            System.out.println(user);            // User [id=1, name=lime, treasure=23.0]            // User [id=2, name=oracle, treasure=25.0]        }//        key-value使用单引号        String limeJSON = JSONObject.toJSONString(lime,                SerializerFeature.UseSingleQuotes);//        {'id':1,'name':'lime','treasure':23}        // 日期格式化        Date date = new Date();        // 默认格式为yyyy-MM-dd HH:mm:ss        System.out.println(JSON.toJSONString(date,                SerializerFeature.WriteDateUseDateFormat));        //根据自定义格式输出日期         System.out.println(JSON.toJSONStringWithDateFormat(date, "yyyy-MM-dd", SerializerFeature.WriteDateUseDateFormat));    }}
     

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