记一次踩坑 Gson转换map对象时 Integer类型自动转换成Double类型

Map<String, Object> params = gson.fromJson(gson.toJson(payMentResultDto), Map.class); 

 //这俩段都是定义：
private static Type typeToken = new TypeToken<TreeMap<String, Object>>(){}.getType();

Gson gson = new GsonBuilder()
            .registerTypeAdapter(
                    new TypeToken<TreeMap<String, Object>>(){}.getType(),
                    new JsonDeserializer<TreeMap<String, Object>>() {
                        @Override
                        public TreeMap<String, Object> deserialize(
                                JsonElement json, Type typeOfT,
                                JsonDeserializationContext context) throws JsonParseException {
 
                            TreeMap<String, Object> treeMap = new TreeMap<>();
                            JsonObject jsonObject = json.getAsJsonObject();
                            Set<Map.Entry<String, JsonElement>> entrySet = jsonObject.entrySet();
                            for (Map.Entry<String, JsonElement> entry : entrySet) {
                                Object ot = entry.getValue();
                                if(ot instanceof JsonPrimitive){
                                    treeMap.put(entry.getKey(), ((JsonPrimitive) ot).getAsString());
                                }else{
                                    treeMap.put(entry.getKey(), ot);
                                }
                            }
                            return treeMap;
                        }
                    }).create();
//实际调用

Map<String, Object> params = gson.fromJson(gson.toJson(payMentResultDto), typeToken);

 原文链接：https://blog.csdn.net/wusj3/java/article/details/79525255