Gson实现LocalDateTime序列化

    private Gson gson = new GsonBuilder()
            .registerTypeAdapter(LocalDateTime.class, new JsonSerializer<LocalDateTime>() {
                @Override
                public JsonElement serialize(LocalDateTime localDateTime, Type type, JsonSerializationContext jsonSerializationContext) {
                    return new JsonPrimitive(localDateTime.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
                }
            })
            .create();