Spring 启动 1.4.3 和@ControllerAdvice

Question

我有一个 spring 4 应用程序，它的 ControllerAdvice 扩展了 ResponseEntityExceptionHandler，在异常出现时工作正常。

@ControllerAdvice
@Slf4j
public class ExceptionManager extends ResponseEntityExceptionHandler {

    @Override
    protected ResponseEntity<Object> handleMethodArgumentNotValid(MethodArgumentNotValidException ex,
                                                                  HttpHeaders headers,
                                                                  HttpStatus status,
                                                                  WebRequest request) {
        final ValidationErrors errors = getErrors(ex.getBindingResult());
        headers.setContentType(MediaType.APPLICATION_JSON);
        return handleExceptionInternal(ex, errors, headers, HttpStatus.BAD_REQUEST, request);
    }


    @Override
    protected ResponseEntity<Object> handleBindException(BindException ex, HttpHeaders headers, HttpStatus status, WebRequest request) {
        final ValidationErrors errors = getErrors(ex.getBindingResult());
        headers.setContentType(MediaType.APPLICATION_JSON);
        return handleExceptionInternal(ex, errors, headers, HttpStatus.BAD_REQUEST, request);
    }

    @ExceptionHandler(ValidationException.class)
    public ResponseEntity handleValidationException(ValidationException ex) {
        log.warn("Validation error", ex);
        return ex.toResponseEntity();
    }

    @ExceptionHandler(HttpClientErrorException.class)
    public ResponseEntity handleHttpClientErrorException(HttpClientErrorException ex) {
        log.error(ex.getMessage());
        return new ResponseEntity(ex.getResponseBodyAsString(), ex.getStatusCode());
    }

    @ExceptionHandler({Exception.class, RuntimeException.class})
    protected ResponseEntity<Object> handleRootException(Exception ex, WebRequest request) {
        return handleException(request, ex);
    }

...
}

然而，在解组器异常的情况下，例如

Exception received: 
org.springframework.http.converter.HttpMessageNotReadableException: Could not unmarshal to [class com.company.etc.v1.PojoResponse]: null; nested exception is javax.xml.bind.UnmarshalException
 - with linked exception:
[org.xml.sax.SAXParseException; lineNumber: 5; columnNumber: 28; Attribute name "entResponse" associated with an element type "assetDocum" must be followed by the ' = ' character.]
    at org.springframework.http.converter.xml.Jaxb2RootElementHttpMessageConverter.readFromSource(Jaxb2RootElementHttpMessageConverter.java:149)
    at org.springframework.http.converter.xml.AbstractXmlHttpMessageConverter.readInternal(AbstractXmlHttpMessageConverter.java:61)
    at org.springframework.http.converter.AbstractHttpMessageConverter.read(AbstractHttpMessageConverter.java:193)
    at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:104)
    at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:917)
    at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:901)
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:655)
    at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:613)
    at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:531)
    at com.company.service.impl.SearchAsset.searchAssets(SearchAsset.java:42)
    ... 57 common frames omitted
Caused by: javax.xml.bind.UnmarshalException: null
    at javax.xml.bind.helpers.AbstractUnmarshallerImpl.createUnmarshalException(AbstractUnmarshallerImpl.java:335)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.createUnmarshalException(UnmarshallerImpl.java:563)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:249)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:214)
    at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:140)
    at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:123)
    at org.springframework.http.converter.xml.Jaxb2RootElementHttpMessageConverter.readFromSource(Jaxb2RootElementHttpMessageConverter.java:133)
    ... 127 common frames omitted
Caused by: org.xml.sax.SAXParseException: Attribute name "entResponse" associated with an element type "assetDocum" must be followed by the ' = ' character.
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:203)
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(ErrorHandlerWrapper.java:177)
    ... 131 common frames omitted

没有捕获异常！它发生在特定情况下，当 @RestController 使用调用外部端点的服务时。在我的例子中，外部服务 returns 和 XML，如果它被破坏（如上面的异常），那么 SAXParseException 不会被捕获并自动转换为 400 Bad Request spring 为空 body。它也根本没有记录。

如果在我的 RestController 中添加一个方法 @ExceptionHandler(Throwable.class)，这个方法会被调用并且我可以控制发回的错误。

这正常吗？我在想 ControllerAdvice 可以集中所有的异常处理，不需要在每个控制器中都有 ExceptionHandler。

Answer 1

刚刚找到解决方案：删除 extends ResponseEntityExceptionHandler。如果你 @ControllerAdvice 不扩展任何东西，看起来效果会更好。

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