효율적인 데이터 구문 분석을 위해 Gson에서 사용자 정의 JSON 역직렬 변환기를 작성하는 방법은 무엇입니까?

@Override
public User deserialize(JsonElement json, Type type,
                        JsonDeserializationContext context) throws JsonParseException {
    int id = json.getAsJsonObject().get("id").getAsInt();
    String name = json.getAsJsonObject().get("name").getAsString();
    Timestamp updateDate = context.deserialize(json.getAsJsonObject().get("update_date"), Timestamp.class);

    return new User(id, name, updateDate);
}

public static void main(String[] args) {
    GsonBuilder gsonBuilder = new GsonBuilder();
    gsonBuilder.setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES);
    gsonBuilder.registerTypeAdapter(Timestamp.class, new TimestampDeserializer());
    Gson gson = gsonBuilder.create();
    User[] users = gson.fromJson(jsonInput, User[].class);
}

class TimestampDeserializer implements JsonDeserializer<Timestamp> {
    @Override
    public Timestamp deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException {
        long time = Long.parseLong(json.getAsString());
        return new Timestamp(time);
    }
}