java,获取json中key的值

package com.test;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

public class TestJson {
        public static void main(String[] args)  throws InterruptedException {
                getJsonKey();
                Thread.currentThread().sleep(200);
                getJsonArrayKey();
        }
        /**
         * @功能描述：普通JSON
         */
        public static void getJsonKey(){
                String createData="{\"mydatas\":{\"price\":10,\"pname\":\"f1\",\"weight\":20,66:88}}";
                System.err.println("getJsonKey:"+createData);
                // 1.将JSON转成JSONObject对象
                JSONObject createJsonObject = JSON.parseObject(createData.toString());
                // 2.获取mydatas内容
                String mydatas = createJsonObject.getString("mydatas");
                System.out.println("JSON:"+mydatas);

                // 3.将子集也转成JSONObject对象
                JSONObject product = JSON.parseObject(mydatas);
                // 4.获取子集内容
                String price = product.getString("price");
                String pname = product.getString("pname");
                String weight = product.getString("weight");
                String m66 = product.getString("66");
                System.out.print("price:"+price);
                System.out.print("    pname:"+pname);
                System.out.print("    weight:"+weight);
                System.out.println("    66:"+m66);
        }
        /**
         * @功能描述：JSON数组
         */
        public static void getJsonArrayKey(){
                // 测试JSON
         String createData="{\"MEMBER_INFO\": [{\"CARD_NAME\": 
\"普通客户\",\"MEM_PROD_LIST\": {},\"BRAND_NAME\": \"动感地带\",\"MEMBER_ID\": 
10057268560,\"CUST_NAME\": \"＊＊静\"}, {\"CARD_NAME\": 
\"普通客户\",\"MEM_PROD_LIST\": {},\"BRAND_NAME\": \"神州行\",\"MEMBER_ID\": 
60053724236,\"CUST_NAME\": \"＊＊娟\"}],\"GROUP_TYPE\": 
\"SNTY\",\"LOCK_FLAG\": \"0\",\"GRPID_NO\": 
11310020302802,\"GROUP_CODE\": \"11310020302802\"}";
                System.err.println("getJsonArryKey:"+createData);
                // 1.将JSON转成JSONObject对象
                JSONObject createJsonObject = JSON.parseObject(createData.toString());
                // 2.获取MEMBER_INFO内容
                JSONArray ja = createJsonObject.getJSONArray("MEMBER_INFO");
                JSONObject jaObject =(JSONObject) ja.get(1);

                System.out.println("ADDPROD_NAME:"+jaObject.getString("ADDPROD_NAME"));
        }
}