Gson替换json中name的值

package com.vip.gsontest.tools;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;

import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonNull;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
/**
 * 日常中经常需要把json转成对象或者把对象转成json,但对应属性名与原来json的key不一致的情况,经常发生，通过该工具，可以进行转换
 * 
 * @author laien.liang
 *
 */
public class GsonUtil {

	public static JsonElement replaceKey(JsonElement source,Map<String, String> rep) {
		if (source == null || source.isJsonNull()) {
			return JsonNull.INSTANCE;
		}
		if (source.isJsonPrimitive()) {
			return source;
		}
		if (source.isJsonArray()) {
			JsonArray jsonArr = source.getAsJsonArray();
			JsonArray jsonArray = new JsonArray();
			jsonArr.forEach(item -> {
				jsonArray.add(replaceKey(item, rep));
			});
			return jsonArray;
		}
		if (source.isJsonObject()) {
			JsonObject jsonObj = source.getAsJsonObject();
			Iterator<Entry<String, JsonElement>> iterator = jsonObj.entrySet().iterator();
			JsonObject newJsonObj = new JsonObject();
			iterator.forEachRemaining(item -> {
				String key = item.getKey();
				JsonElement value = item.getValue();
				if (rep.containsKey(key)) {
					String newKey = rep.get(key);
					key = newKey;
				}
				newJsonObj.add(key, replaceKey(value, rep));
			});

			return newJsonObj;
		}
		return JsonNull.INSTANCE;
	}
	public static void main(String[] args) {
		String json = "{\"order_sn\":\"14031000273822\",\"carriers_code\":1100000357,\"carrier\":\"浙*尔快递\",\"package_type\":2,\"packages\":[{\"0\":{\"good_sn\":\"ALM2236W36\",\"amount\":\"2\"},\"1\":{\"good_sn\":\"ALM2236W37\",\"amount\":\"2\"},\"transport_no\":\"test5715A\"},{\"0\":{\"good_sn\":\"ALM2236W35\",\"amount\":\"2\"},\"transport_no\":\"test5715B\"}]}";
		JsonElement jsonEle = new JsonParser().parse(json);
		HashMap<String, String> rep = new HashMap<String, String>();
		rep.put("order_sn", "order_id");
		rep.put("carriers_code", "carrier_code");
		rep.put("good_sn", "barcode");
		JsonElement replaceKey = replaceKey(jsonEle, rep);
		System.out.println(replaceKey.toString());

	}

}