@ExceptionHandler 不捕获 MethodArgumentNotValid

Question

我有以下几点@ControllerAdvice：

@ControllerAdvice

public class ExceptionHandlingController {

    @ExceptionHandler(value = { MethodArgumentNotValidException.class,

            EntityExistsException.class, BadCredentialsException.class, MismatchedInputException.class })

    public ResponseEntity<ExceptionResponse> invalidInput(RuntimeException ex) {

        ExceptionResponse response = new ExceptionResponse();

        response.setErrorCode("BAD_REQUEST");

        response.setErrorMessage(ex.getMessage());

        return new ResponseEntity<ExceptionResponse>(response,

                HttpStatus.BAD_REQUEST);

    }

}

验证器以这种方式绑定到控制器：

@RestController

@RequestMapping("/api/authentication")

public class UserAccountControllerImpl implements UserAccountController {

    @Autowired

    private UserAccountService userAccountService;

    @Override

    public UserAccountEntity login(@Valid @RequestBody UserAccountEntity account,

            HttpServletResponse response) throws BadCredentialsException {

        return userAccountService.authenticateUserAndSetResponsenHeader(

                account.getUsername(), account.getPassword(), response);

    }

    @Override

    public UserAccountEntity create(@Valid @RequestBody UserAccountEntity userAccount,

            HttpServletResponse response) throws EntityExistsException {

        String username = userAccount.getUsername();

        String password = userAccount.getPassword();

        userAccountService.saveIfNotExists(username, password);

        return userAccountService.authenticateUserAndSetResponsenHeader(

                username, password, response);

    }

    //used to bind the validator to the incoming request

    @InitBinder

    public void binder(WebDataBinder binder) {

        binder.addValidators(new UserAccountValidator());

    }

}

为什么抓不到MethodArgumentNotValidException？

Answer 1

至少，异常 MethodArgumentNotValidException 不是 RuntimeException，但您在该异常处理程序中使用 RuntimeException 参数。对于测试，将方法参数中的 RuntimeException 更改为 Exception。