线程“main”中的异常net.sf.json.JSONException：找不到JSONObject [“groupCode”]

Question

我有下面给出的JSON数组，并在获取JsonObject时遇到异常。

我的编码

import java.util.HashMap;
import java.util.Map;

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



public class ParseJSON
{
    public static void main(String[] args) throws JSONException
    {
        String resultJson = "{\"request\":[{\"Number\":[\"91\"]},{\"groupCode\":[\"SHUBAP\"]},{\"welcomenotesList\":[\"Thanks for calling us\",\"Please select from the following list\"]}]}";

        JSONObject json = (JSONObject) JSONSerializer.toJSON(resultJson);    
        JSONArray jarray = json.getJSONArray("request");
        for(int i=0 ; i < jarray.size(); i++) 
        {
            System.out.println("jarray [" + i + "] --------  " + jarray.getString(i));
        }

        Map<String, Object> map = new HashMap<String, Object>();

        for (int i=0; i < jarray.size(); i++)
        {
          JSONObject jsonvalue = jarray.getJSONObject(i);

          // Pulling items from the array

          Stringnumber = jsonvalue.getString("Number");
          System.out.println("number   " + number);
          String groupcode = jsonvalue.getString("groupCode");
          String welcomenotesList = jsonvalue.getString("welcomenotesList");

          map.put("number", number);
          map.put("groupCode", groupcode);

          System.out.println("map  " + map);
        }
    }
}

我在获取组代码时遇到错误。 线程“main”中的异常net.sf.json.JSONException：找不到JSONObject [“groupCode”]。

输出

jarray [0] --------  {"Number":["91"]}
jarray [1] --------  {"groupCode":["SHUBAP"]}
jarray [2] --------  {"welcomenotesList":["Thanks for calling us","Please select from the following list"]}
number   ["91"]
Exception in thread "main" net.sf.json.JSONException: JSONObject["groupCode"] not found.
    at net.sf.json.JSONObject.getString(JSONObject.java:2092)
    at api.module.ParseJSON.main(ParseJSON.java:38)

我无法使用key作为groupCode获取json值。