后端目录打开  vendor\laravel\framework\src\Illuminate\Http\JsonResponse.php  文件


文件内搜索   setData   方法，将下方的替换进去


    public function setData($data = [])
    {
        $this->original = $data;

        if ($data instanceof Jsonable) {
            $this->data = $data->toJson($this->encodingOptions);
        } elseif ($data instanceof JsonSerializable) {
            $this->data = json_encode($data->jsonSerialize(), $this->encodingOptions);
        } elseif ($data instanceof Arrayable) {
            $this->data = json_encode($data->toArray(), $this->encodingOptions);
        } else {
            $this->data = json_encode($data, $this->encodingOptions);
        }

        if (! $this->hasValidJson(json_last_error())) {
            throw new InvalidArgumentException(json_last_error_msg());
        }

        return $this->update();
    }