'required|string|max:255', ]; } public function messages(){ $message = [ 'key.required' => 'key必填', ]; return $message; } protected function failedValidation(Validator $validator){ $error = $validator->errors()->all(); throw new HttpResponseException(response()->json(['data' => null, 'code' => 400, 'message' => $error[0]])); } }