JSON与Map之间转换

最新推荐文章于 2023-10-22 09:44:59 发布

晓航仔

最新推荐文章于 2023-10-22 09:44:59 发布

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分类专栏： JSON

本文链接：https://blog.youkuaiyun.com/qq_38394518/article/details/81205852

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package javaTest;

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

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

/**
* @author xuhang
*
*/
public class XuTest1 {

public static void main(String[] args) {

       // 对象转json字符串
       List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
       Map<String, Object> map1 = new HashMap<String, Object>();// 对象1
       Map<String, Object> map2 = new HashMap<String, Object>();// 对象2
       map1.put("aaa", "liaaa");
       map1.put("bbb", "libbb");
       map2.put("ccc", "liccc");
       map2.put("ddd", "liddd");
       list.add(map1);
       list.add(map2);
       JSONArray jsonArrayrr = JSONArray.fromObject(list);
       System.out.println(jsonArrayrr.toString() + "=======================;;;;========");

       // json字符串转复杂对象=====begin
       // JSONArray
       String jsonArrayData = "[{\"a1\":\"12\",\"b1\":\"112\",\"c1\":\"132\",\"d1\":\"134\"},{\"a2\":\"12\",\"b2\":\"112\",\"c2\":\"132\",\"d2\":\"134\"},{\"a3\":\"12\",\"b3\":\"112\",\"c3\":\"132\",\"d3\":\"134\"}]";
       JSONArray jsonArray = JSONArray.fromObject(jsonArrayData);
       List<Map<String, Object>> mapListJson = (List) jsonArray;
       for (int i = 0; i < mapListJson.size(); i++) {
           Map<String, Object> obj = mapListJson.get(i);

           for (Entry<String, Object> entry : obj.entrySet()) {
               String strkey1 = entry.getKey();
               Object strval1 = entry.getValue();
               System.out.println("KEY:" + strkey1 + " --> Value:" + strval1 + "\n");
           }
       }

System.out.println("JSONArray=============================================================");

       // JSONObject
       String jsonObjectData = "{\"data1\":{\"a1\":\"12\",\"b1\":\"112\",\"c1\":\"132\",\"d1\":\"134\"},\"data2\":{\"a2\":\"12\",\"b2\":\"112\",\"c2\":\"132\",\"d2\":\"134\"},\"data3\":{\"a3\":\"12\",\"b3\":\"112\",\"c3\":\"132\",\"d3\":\"134\"}}";
       JSONObject jsonObject = JSONObject.fromObject(jsonObjectData);
       Map<String, Object> mapJson = JSONObject.fromObject(jsonObject);
       for (Entry<String, Object> entry : mapJson.entrySet()) {
           Object strval1 = entry.getValue();
           JSONObject jsonObjectStrval1 = JSONObject.fromObject(strval1);
           Map<String, Object> mapJsonObjectStrval1 = JSONObject.fromObject(jsonObjectStrval1);
           System.out.println("KEYw:" + entry.getKey() + " --> Valuew:" + entry.getValue() + "\n");
           for (Entry<String, Object> entry1 : mapJsonObjectStrval1.entrySet()) {
               System.out.println("KEY:" + entry1.getKey() + " --> Value:" + entry1.getValue() + "\n");
           }

       }
       System.err.println("JSONObject****************************************************************");
       // ==============end


       // 判断是否是json格式字符串======begin
       String iioo = "{\"lng\":125.338965,\"lat\":43.814968,\"userid\":362,\"shopid\":27}";
       JsonToMap jsonToMap = new JsonToMap();
       boolean ttt = jsonToMap.isJson(iioo);
       System.err.println("ttt:" + ttt);
       if (ttt == false) {
           return;
       }

JSONObject jsonObject11 = JSONObject.fromObject(iioo);
Map<String, Object> mapJson11 = JSONObject.fromObject(jsonObject11);

       for (Map.Entry<String, Object> entry : mapJson11.entrySet()) {
           System.err.println("key:" + entry.getKey());
           System.err.println("val:" + entry.getValue());
       }

}
public boolean isJson(String content) {

       try {
           JSONObject jsonObject11 = JSONObject.fromObject(content);
           return true;
       } catch (Exception e) {
           return false;
       }
   }

}