Json使用

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package com.soc.cloud.mobileApplications.controller;   import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.HashMap; import java.util.List; import java.util.Map;   import com.soc.cloud.util.JsonObjUtils;   import net.sf.json.JSONObject;   public class Main {     public static void main(String[] args) throws Exception {         Integer a = 1;         Integer b = 1;         Integer c = 1;         Integer num = a + b + c;         System.out.println(num);                   //"detectionTime": "2018-03-14 10:24:33"         Map<String, Object> result = new HashMap<>();         result.put("detectionTime", "2018-03-14 10:24:33");         JSONObject jsonObject = JSONObject.fromObject(result); //      DateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); //      String checkTimeStr = jsonObject.getString("detectionTime"); //      Date checkTime = sdf.parse(checkTimeStr);         Date checkTime = JsonObjUtils.map2obj(jsonObject,"detectionTime", Date.class);         System.out.println(checkTime);           //      { //          "status":0, //          "searchIds":[ //          {"appId":"***","searchId":"***","errorMessage":""}, //          {"appId":"***","searchId":"","errorMessage":"已加固"} //          }] //      }         System.out.println("************");         List<Object> list = new ArrayList<>();         for(int i=0;i<5;i++) {             Map<String, Object> map1 = new HashMap<>();             map1.put("appId", i+100);             map1.put("searchId", i+100);             map1.put("errorMessage", "错误信息"+(i+100));             list.add(map1);         }         Map<String, Object> map3 = new HashMap<>();         map3.put("status", 0);         map3.put("searchIds", list);         JSONObject sbJson = JSONObject.fromObject(map3);         System.out.println(sbJson);         System.out.println("************************");         for(int i=0;i<sbJson.getJSONArray("searchIds").size();i++) {             JSONObject searchIdJson = JSONObject.fromObject(sbJson.getJSONArray("searchIds").get(0));             System.out.println(searchIdJson);//{"searchId":100,"appId":100,"errorMessage":"错误信息100"}             System.out.println(searchIdJson.getString("appId"));//100         }         System.out.println("************");         System.out.println(sbJson.getString("status"));//0                                   } }