Springboot異常處理程序沒有捕獲異常

Question

在Spring Boot and Rest應用程序中，我已按如下方式配置了異常處理程序。 如果在請求使其停止服務后引發異常，則該方法工作正常。

Rest api期望Content-Type為“ application / json”，並且如果我不將該內容標頭發送到api，則異常處理程序將無法捕獲該異常。 它在日志中打印以下信息：

DEBUG [o.s.w.s.DispatcherServlet] DispatcherServlet with name 'dispatcherServlet' processing PUT request for [/app/v1.0/customers/customer/zones/zoneName.]
DEBUG [o.s.w.s.m.m.a.RequestMappingHandlerMapping] Looking up handler method for path /app/v1.0/customers/customer/zones/zoneName.
DEBUG [o.s.w.s.m.m.a.ExceptionHandlerExceptionResolver] Resolving exception from handler [null]: org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'text/plain' not supported
DEBUG [o.s.w.s.m.m.a.ExceptionHandlerExceptionResolver] Invoking @ExceptionHandler method: public final org.springframework.http.ResponseEntity<java.lang.Object> org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler.handleException(java.lang.Exception,org.springframework.web.context.request.WebRequest)
DEBUG [o.s.w.s.DispatcherServlet] Null ModelAndView returned to DispatcherServlet with name 'dispatcherServlet': assuming HandlerAdapter completed request handling
DEBUG [o.s.w.s.DispatcherServlet] Successfully completed request

這是異常處理程序類：

@ControllerAdvice
@RestController  
public class ServiceExceptionHandler extends ResponseEntityExceptionHandler
{

    @ExceptionHandler(Exception.class)  
    public final ResponseEntity<java.lang.Object> handleException(Throwable ex,WebRequest req)
    {
        ErrorResponse errorResponse = null;
        if (ex instanceof ApiException)
        {
            errorResponse = new ErrorResponse((ApiException) ex);
        }
        else
        {
            logger.error(ex);
            errorResponse = new ErrorResponse();
            errorResponse.setCode(HttpCodes.HTTP_CODE_500);
            errorResponse.setError(ex.getMessage());
        }
        return new ResponseEntity<Object>(errorResponse,
                HttpStatus.valueOf(errorResponse.getCode()));

    }
    protected ResponseEntity<Object> handleNoHandlerFoundException(NoHandlerFoundException ex,
            HttpHeaders headers, HttpStatus status, WebRequest request)
    {
        Map<String, String> responseBody = new HashMap<String, String>();
        responseBody.put("path", request.getContextPath());
        responseBody.put("message",
                "The URL you have reached is not in service at this time (404).");
        return new ResponseEntity<Object>(responseBody, HttpStatus.NOT_FOUND);
    }
}

Answer 1

您的課程將僅捕獲從控制器內部引發的錯誤。 您看到的錯誤發生在調用控制器之前，因為Spring無法找到控制器來處理請求。

DEBUG [o.s.w.s.m.m.a.RequestMappingHandlerMapping] Looking up handler method for path /app/v1.0/customers/customer/zones/zoneName.
DEBUG [o.s.w.s.m.m.a.ExceptionHandlerExceptionResolver] Resolving exception from handler [null]: org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'text/plain' not supported

請注意，處理程序為null。

您還需要實現HandlerExceptionResolver來處理這種類型的異常： http : HandlerExceptionResolver

有關更多詳細信息，請參見控制器外部的Spring異常處理程序 。

Answer 2

這是最終的解決方案：

@ControllerAdvice  
public class SpringExceptionHandler extends ExceptionHandlerExceptionResolver
{
    @ExceptionHandler(org.springframework.web.HttpMediaTypeNotSupportedException.class)
    public ResponseEntity<Object> handleControllerException(HttpMediaTypeNotSupportedException ex, WebRequest req)
    {
        ErrorResponse errorResponse = null;
        ex.printStackTrace();
        errorResponse = new ErrorResponse();
        errorResponse.setCode(HttpCodes.HTTP_CODE_INTERNAL_ERROR);
        errorResponse.setError(ex.getMessage());
        return new ResponseEntity<Object>(errorResponse,
            HttpStatus.valueOf(errorResponse.getCode()));
    }
}

現在，我需要進行一些更改，以使其適用於所有異常，包括引發的控制器，但這將在以后提供。 （感謝亞當）。

重要說明：如果同時存在全局處理程序和實體處理程序，spring將忽略全局處理程序。