Question

有一个JSON字符串

{"uuid": "a1e55ef2-3a58-40d7-9ca2-49b0c3aa653c","args": {"ids": [5,77,999], type: "item_delete"}}

我试图反序列化到下面的类

class Foo {
    String uuid;
    Map<String,Object> args;
}

使用此代码

public static void main(String[] args) {
    String commandJson = ...;
    Gson gson = new Gson();
    Foo foo = gson.fromJson(commandJson, Foo.class);
}

然后，在调试器中，我可以看到ids属性表示为ArrayList<Double>，因此我可以看到5,77,999而不是5.0,77.0,999.0。

我尝试使用很多不同的JsonDeserializer和TypeAdapter来自定义GsonBuilder，例如

    GsonBuilder gsonBuilder = new GsonBuilder()
            .registerTypeHierarchyAdapter(Double.class, new JsonDeserializer<Integer>() { // also tried Number.class
                @Override
                public Integer deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
                        throws JsonParseException {
                    return null; // No implementation in this example as it is not even called
                }
             });
    Gson gson = gsonBuilder.create();

或

class IntegerTypeAdapter extends TypeAdapter<Integer> {
    @Override
    public void write(JsonWriter out, Integer value) throws IOException {
        System.out.println("hello from write");
    }
    @Override
    public Integer read(JsonReader in) throws IOException {
        System.out.println("hello from read");
        return null; // I didn't implement it as it looks like it is not even called
    }
}

public static void main(String[] args) {
    GsonBuilder gsonBuilder = new GsonBuilder()
            .registerTypeAdapter(Integer.class, new IntegerTypeAdapter());
        Gson gson = gsonBuilder.create();
}

使用registerTypeAdapter和registerTypeHierarchyAdapter方法注册，但看起来他们的代码不是执行事件。我试图从我的TypeAdapter或JsonDeserializer代码中打印一些东西 - 它没有打印，代码执行也没有在代码中的断点处停止。

Gson版本：2.2.4

Gson将整数数组反序列化为Doubles的ArrayList而不是整数的ArrayList（或int的数组）作为Map <string，object>的值

0 个答案: