java - ExceptionHandler，得到 java.lang.IllegalStateException : Could not resolve method parameter at index 0?

Question

我对 Java Spring 的 ExceptionHandler 有问题。我有一个名为 EntityNotFoundException 的异常，我想在引发异常时从 REST Controller 调用 ExceptionHandler 方法。

这是我的 REST Controller 方法代码:

@ExceptionHandler(Exception.class)
public ResponseEntity insertTicket(@Valid @RequestBody Ticket ticket, @AuthenticationPrincipal Principal principal) throws EntityNotFoundException {
    ticket.setCreationTimestamp(Instant.now());
    ticket.setSource(TicketSource.CLIENT);
    ticket.setCurrentTicketStatus(TicketStatus.VALIDATION);
    User customer = userController.findUserByUsername(principal.getName());
    ticket.setCustomer(customer);
    try {
        ticket.setAttachments(savedFiles(
                ticket.getAttachments(),
                ticket.getCustomer().getUsername()
        ));
    } catch (FileUploadException e) {
        return CommonResponseEntity.NotFoundResponseEntity("ENTITY_NOT_FOUND");
    }
    ticketController.insertTicket(ticket);

    mailSenderController.sendMail(customer.getEmail(), "TICKET_OPENED");

    return CommonResponseEntity.CreatedResponseEntity("CREATED");
}

这是我的异常处理程序代码:

@EnableWebMvc
@ControllerAdvice
@RestControllerAdvice
public class InterceptedResponseEntityExceptionHandler extends 
   ResponseEntityExceptionHandler {
    @Override
    protected ResponseEntity<Object> handleMethodArgumentNotValid(MethodArgumentNotValidException ex, HttpHeaders headers, HttpStatus status, WebRequest request) {
    BindingResult bindingResult = ex.getBindingResult();

    List<MethodArgumentFieldError> methodArgumentFieldErrors = bindingResult
            .getFieldErrors()
            .stream()
            .map(fieldError -> new MethodArgumentFieldError(fieldError.getField(), fieldError.getCode(), fieldError.getRejectedValue()))
            .collect(Collectors.toList());

    List<MethodArgumentGlobalError> methodArgumentGlobalErrors = bindingResult
            .getGlobalErrors()
            .stream()
            .map(globalError -> new MethodArgumentGlobalError(globalError.getCode()))
            .collect(Collectors.toList());

    MethodArgumentError methodArgumentError = new MethodArgumentError(methodArgumentFieldErrors, methodArgumentGlobalErrors);

    return new ResponseEntity<>(methodArgumentError, HttpStatus.UNPROCESSABLE_ENTITY);
}

@Override
protected ResponseEntity<Object> handleMissingServletRequestParameter(MissingServletRequestParameterException ex, HttpHeaders headers, HttpStatus status, WebRequest request) {
    MissingParameterError missingParameterError = new MissingParameterError(ex.getParameterName(), ex.getMessage());

    return new ResponseEntity<>(missingParameterError, HttpStatus.UNPROCESSABLE_ENTITY);
}



@ExceptionHandler(Exception.class)
public ResponseEntity<Object> handleNotFound(Exception ex, WebRequest request) {

    System.out.println("inside!");

    if( ex instanceof DataIntegrityViolationException){
        System.out.println("Data integrity violation");
        String constraintViolationErrors = ex.getMessage();
        String msgErr = (constraintViolationErrors.substring(constraintViolationErrors.indexOf("=") + 1));
        return new ResponseEntity<>(msgErr, HttpStatus.BAD_REQUEST);
    }

    if(ex instanceof UsernameNotFoundException) {
        String msgErr = ex.getMessage();
        return new ResponseEntity<>(msgErr, HttpStatus.BAD_REQUEST);
    }


    if (ex instanceof NotFoundEntityException || ex instanceof EntityNotFoundException || ex instanceof NoSuchElementException){
        //return CommonResponseEntity.NotFoundResponseEntity(ex.getMessage());
        System.out.println("inside the handler!");
        return new ResponseEntity<>(ex.getMessage(),HttpStatus.NOT_FOUND);
    }

    if(ex instanceof  UpdateException){
        return new ResponseEntity<>(HttpStatus.CONFLICT);
    }

    return null;
}





@Data
@AllArgsConstructor
public class MethodArgumentError {
    private List<MethodArgumentFieldError> fieldErrors;
    private List<MethodArgumentGlobalError> globalErrors;
}

@Data
@AllArgsConstructor
public class MethodArgumentFieldError {
    private String field;
    private String code;
    private Object rejectedValue;
}

@Data
@AllArgsConstructor
public class MethodArgumentGlobalError {
    private String code;
}

@Data
@AllArgsConstructor
public class MissingParameterError {
    private String parameterName;
    private String message;
}

@Data
@AllArgsConstructor
public class ConstraintViolationError {
    private String invalidValue;
    private String message;
}

}

我不知道为什么，当我收到 DataIntegrityViolationException 时，会调用 ExceptionHandler，而当我收到 EntitynotFoundException 时，我会收到以下消息:

java.lang.IllegalStateException: Could not resolve method parameter at index 0 in public org.springframework.http.ResponseEntity com.isssr.ticketing_system.rest.TicketRest.insertTicket(com.isssr.ticketing_system.entity.Ticket,java.security.Principal) throws com.isssr.ticketing_system.exception.EntityNotFoundException: No suitable resolver for argument 0 of type 'com.isssr.ticketing_system.entity.Ticket'

有什么问题吗？

Answer 1

我还看到了其他奇怪的事情；我收到此消息:

无法调用@ExceptionHandler方法:public org.springframework.http.ResponseEntity com.isssr.ticketing_system.rest.TicketRest.insertTicket(com.isssr.ticketing_system.entity.Ticket,java.security.Principal) throws com.isssr .ticketing_system.exception.EntityNotFoundException

看来 Spring 正在尝试调用另一个方法而不是我的 ExceptionHandler 的方法。 这怎么可能？