Gson轉Map時，Int會變成double解決方法

package com.cdy.demo; import java.lang.reflect.Type; import java.util.HashMap; import java.util.Map; import java.util.Set; import com.google.gson.Gson; import com.google.gson.GsonBuilder; import com.google.gson.JsonDeserializationContext; import com.google.gson.JsonDeserializer; import com.google.gson.JsonElement; import com.google.gson.JsonObject; import com.google.gson.JsonParseException; public class GsonDoubleInteger { public static Gson getGson() { Gson gson = new GsonBuilder().registerTypeAdapter(HashMap.class, new JsonDeserializer<HashMap>() { @Override public HashMap<String, Object> deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException { HashMap<String, Object> resultMap = new HashMap<>(); JsonObject jsonObject = json.getAsJsonObject(); Set<Map.Entry<String, JsonElement>> entrySet = jsonObject.entrySet(); for (Map.Entry<String, JsonElement> entry : entrySet) { resultMap.put(entry.getKey(), entry.getValue()); } return resultMap; } }).create(); return gson; } @SuppressWarnings("unchecked") public static void main(String[] args) { String aaa = "{ a: 1, b: 2.3 }"; HashMap<String, Object> map = getGson().fromJson(aaa, HashMap.class); System.out.println(map); } }