1.關鍵字解釋

//它是一個Controller增強器,可對controller中被 @RequestMapping註解的方法加一些邏輯處理
@ControllerAdvice
//異常定義
@ExceptionHandler
//返回格式為json,可以使用 @RestControllerAdvice 代替 @ControllerAdvice,這樣在方法上就可以不需要新增 @ResponseBody
@ResponseBody

2.springmvc對於http請求的異常型別

3.程式碼

@ControllerAdvice
public class RestfulApiExceptionHandler {
    /**
     * 缺失引數
     * @param request
     * @param exception
     * @return
     
 
*/
    @ExceptionHandler(value = MissingServletRequestParameterException.class)
    @ResponseBody
    public Response missingParameterExceptionHandler(HttpServletRequest request, MissingServletRequestParameterException exception){
        return Response.failure("缺少必要引數,引數名稱為" + exception.getParameterName());
    }

    /**
     * 引數型別不匹配
     * @param request
     * @param exception
     * @return
     */
    @ExceptionHandler({TypeMismatchException.class})
    @ResponseBody
    public Response typeMismatchExceptionHandler(HttpServletRequest request,TypeMismatchException exception){
        return Response.failure("引數型別不匹配,型別應該為" + exception.getRequiredType());
    }

    /**
     * 請求方法不支援
     * @param request
     * @param exception
     * @return
     */
    @ExceptionHandler(value = HttpRequestMethodNotSupportedException.class)
    @ResponseBody
    public Response methodNotSupportedExceptionHandler(HttpServletRequest request,HttpRequestMethodNotSupportedException exception){
        return Response.failure("不支援的請求方法");
    }
    /**
     * 其他異常
     * @param request
     * @param exception
     * @return
     */
    @ExceptionHandler(value = Exception.class)
    @ResponseBody
    public Response exceptionHandler(HttpServletRequest request, Exception exception){
        return Response.failure("系統異常");
    }
}