Restful接口调用统一异常处理

//它是一个Controller增强器,可对controller中被 @RequestMapping注解的方法加一些逻辑处理
@ControllerAdvice
//异常定义
@ExceptionHandler
//返回格式为json,可以使用 @RestControllerAdvice 代替 @ControllerAdvice,这样在方法上就可以不需要添加 @ResponseBody
@ResponseBody

@ControllerAdvice
public class RestfulApiExceptionHandler {
    /**
     * 缺失参数
     * @param request
     * @param exception
     * @return
     */
    @ExceptionHandler(value = MissingServletRequestParameterException.class)
    @ResponseBody
    public Response missingParameterExceptionHandler(HttpServletRequest request, MissingServletRequestParameterException exception){
        return Response.failure("缺少必要参数,参数名称为" + exception.getParameterName());
    }

    /**
     * 参数类型不匹配
     * @param request
     * @param exception
     * @return
     */
    @ExceptionHandler({TypeMismatchException.class})
    @ResponseBody
    public Response typeMismatchExceptionHandler(HttpServletRequest request,TypeMismatchException exception){
        return Response.failure("参数类型不匹配,类型应该为" + exception.getRequiredType());
    }

    /**
     * 请求方法不支持
     * @param request
     * @param exception
     * @return
     */
    @ExceptionHandler(value = HttpRequestMethodNotSupportedException.class)
    @ResponseBody
    public Response methodNotSupportedExceptionHandler(HttpServletRequest request,HttpRequestMethodNotSupportedException exception){
        return Response.failure("不支持的请求方法");
    }
    /**
     * 其他异常
     * @param request
     * @param exception
     * @return
     */
    @ExceptionHandler(value = Exception.class)
    @ResponseBody
    public Response exceptionHandler(HttpServletRequest request, Exception exception){
        return Response.failure("系统异常");
    }
}