zoukankan      html  css  js  c++  java
  • gson转换问题

    list集合中integer问题

    List<Integer> lists= gson.fromJson(params.get("lists"), new TypeToken<ArrayList<Integer>>() {}.getType());

    空值不转换问题

    Gson gson = new GsonBuilder().serializeNulls().create();

    日期格式化

    Gson gson = new GsonBuilder().setDateFormat("yyyy/MM/dd HH:mm:ss").create();

    object转string

    public static String parseJsonSetId(Object obj) {
    GsonBuilder builder = new GsonBuilder();
    builder.registerTypeAdapter(ObjectId.class,
    new JsonSerializer<ObjectId>() {

    @Override
    public JsonElement serialize(ObjectId arg0, Type arg1,
    JsonSerializationContext arg2) {
    return new JsonPrimitive(arg0.toString());
    }
    });
    Gson gson = builder.create();
    return gson.toJson(obj);
    }

    integer默认转double解决办法     下面方法貌似不能用的

    Gson gson = new GsonBuilder().registerTypeAdapter(Double.class, new JsonSerializer<Double>() {
    @Override
    public JsonElement serialize(Double src, Type typeOfSrc, JsonSerializationContext context) {
    if (src == src.longValue())
    return new JsonPrimitive(src.longValue());
    return new JsonPrimitive(src);
    }
    }).create();

  • 相关阅读:
    HDU3555:Bomb
    入门OJ:售货员的难题
    Zju1100 Mondriaan
    与图论的邂逅08:树上倍增
    入门OJ:八中生成树2
    Poj2286 The Rotation Game
    P1379 八数码难题
    [SCOI2005]骑士精神
    与图论的邂逅07:K短路
    [Usaco2007 Feb]Cow Party
  • 原文地址:https://www.cnblogs.com/liangbo-/p/8621552.html
Copyright © 2011-2022 走看看