java根据key获取任意json结构的值

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 */
package test;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import java.util.Set;

/**
 *
 * @author cangyue
 */
public class Example {

    public static void main(String[] args) {
        String json = "{\n"
                + "    \"Response\": {\n"
                + "        \"InstanceIdSet\": [\n"
                + "            \"xxx1\",\n"
                + "            \"xxx2\"\n"
                + "        ],\n"
                + "        \"RequestId\": \"eac6b301-a322-493a-8e36-83b295459397\"\n"
                + "    }\n"
                + "}";
        JSONObject object1 = JSONObject.parseObject(json);

        List