如何处理 Spring 启动 2 中对象在@Requestbody中引发的异常

Question

我有一个 rest 控制器类，如下所示，当用户对象无效时会引发自定义异常。但是这些异常被 spring 框架包装了，而不是由控制器建议中定义的特定异常处理程序处理。

@PostMapping
public ResponseEntity<String> process(
@PathVariable(User_id) String id,
@Valid @RequestBody(required = false) User user) {
}

例如，Json 映射异常被包装为 org.springframework.http.converter.HttpMessageNotReadableException，而不是由控制器建议中的以下异常处理程序处理。

@ExceptionHandler(JsonMappingException.class)
public ResponseEntity<ErrorMessage> handleJsonMappingException(JsonMappingException e){
//process to return error message
}

如何处理在构建请求正文对象时引发的这些特定异常？

收到的实际异常：

2018-09-16 23:14:07,671 ERROR [qtp1824013753-23] c.m.a.c.e.m.MyExceptionHandler [MyExceptionHandler.java:111] Unhandled exception : Type definition error: [simple type, class com.common.model.User]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `com.common.model.User`, problem: '123ghijk' is not a valid DeptName
at [Source: UNKNOWN; line: -1, column: -1] (through reference chain: com.common.model.Employee["DeptName"])
org.springframework.http.converter.HttpMessageConversionException: Type definition error: [simple type, class com.common.model.User]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `com.common.model.User`, problem: '123ghijk' is not a valid DeptName
at [Source: UNKNOWN; line: -1, column: -1] (through reference chain: com.common.model.Employee["DeptName"])
at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:238)
at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.read(AbstractJackson2HttpMessageConverter.java:223)
at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver.readWithMessageConverters(AbstractMessageConverterMethodArgumentResolver.java:206)
at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.readWithMessageConverters(RequestResponseBodyMethodProcessor.java:157)
at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.resolveArgument(RequestResponseBodyMethodProcessor.java:130)
at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:124)
at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:161)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:131)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:877)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:783)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:877)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:865)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1655)
at com.gateway.rest.OutstandingCallFilter.doFilter(OutstandingCallFilter.java:84)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1642)
at com.common.logging.Slf4jRequestLoggingFilter.doFilter(Slf4jRequestLoggingFilter.java:30)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1642)
at com.gateway.rest.AuthenticationFilter.doFilter(AuthenticationFilter.java:40)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1642)
at org.springframework.boot.actuate.web.trace.servlet.HttpTraceFilter.doFilterInternal(HttpTraceFilter.java:90)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1642)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1642)
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:109)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1642)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1642)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1642)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:533)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1317)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1219)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.Server.handle(Server.java:531)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:352)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:281)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102)
at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:762)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:680)
at java.lang.Thread.run(Thread.java:748)
Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `com.common.model.User`, problem: '123ghijk' is not a valid DeptName
at [Source: UNKNOWN; line: -1, column: -1] (through reference chain: com.common.model.Employee["DeptName"])
at com.fasterxml.jackson.databind.exc.InvalidDefinitionException.from(InvalidDefinitionException.java:67)
at com.fasterxml.jackson.databind.DeserializationContext.instantiationException(DeserializationContext.java:1601)
at com.fasterxml.jackson.databind.deser.std.StdValueInstantiator.wrapAsJsonMappingException(StdValueInstantiator.java:484)
at com.fasterxml.jackson.databind.deser.std.StdValueInstantiator.rewrapCtorProblem(StdValueInstantiator.java:503)
at com.fasterxml.jackson.databind.deser.std.StdValueInstantiator.createFromString(StdValueInstantiator.java:328)
at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromString(BeanDeserializerBase.java:1373)
at com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeOther(BeanDeserializer.java:171)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:161)
at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:127)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:288)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:151)
at com.fasterxml.jackson.databind.ObjectMapper._readValue(ObjectMapper.java:3984)
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2276)
at com.fasterxml.jackson.databind.ObjectMapper.treeToValue(ObjectMapper.java:2758)
at com.common.json.ApiDeserializer.deserialize(ApiDeserializer.java:48)
at com.common.json.ApiDeserializer.deserializeWithType(ApiDeserializer.java:32)
at com.fasterxml.jackson.databind.deser.impl.TypeWrappedDeserializer.deserialize(TypeWrappedDeserializer.java:68)
at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4013)
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3084)
at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:235)
... 70 common frames omitted
Caused by: com.common.exception.MyException: '123asd' is not a valid DeptName
at com.common.model.User.stringToUser(User.java:41)
at com.common.model.User.<init>(User.java:29)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at com.fasterxml.jackson.databind.introspect.AnnotatedConstructor.call1(AnnotatedConstructor.java:129)
at com.fasterxml.jackson.databind.deser.std.StdValueInstantiator.createFromString(StdValueInstantiator.java:326)

Answer 1

您应该在controllerAdvice中使用@ExceptionHandler(MethodArgumentNotValidException.class)。

@ControllerAdvice
public class ExceptionHandlingController {

@ExceptionHandler(MethodArgumentNotValidException.class)
public ResponseEntity<ErrorMessage> handleException(MethodArgumentNotValidExceptione e){
//e.getBindingResult().getAllErrors()
}
@ExceptionHandler(JsonMappingException.class)
public  
ResponseEntity<ErrorMessage>handleJsonMappingException(JsonMappingException e){
}
}

Answer 2

在您的情况下，您的异常是HttpMessageNotReadableException所以你需要处理这个异常：

@ExceptionHandler(HttpMessageNotReadableException.class)
public ResponseEntity<ErrorMessage> handleException(HttpMessageNotReadableException e){
//process to return error message
}

Answer 3

您可以通过method level, controller level or globally来处理 Spring 引导中的异常。

这是您在全球范围内处理所有异常并发送客户错误响应的方式。

在下面，您可以处理所有方法参数异常，例如在定义为@RequestBody的实体或业务实体中定义的所有验证，但请确保在控制器方法中@Valid将 Body Request 放在 Body Request 之前。

您可以对其他类型的异常执行相同的操作，甚至是自定义异常，只需按异常类型扩展并在此处以相同的@RestControllerAdvice

处理

@RestControllerAdvice
public class GlobalExceptionHandler {
@ExceptionHandler(MethodArgumentNotValidException.class)
@ResponseStatus(HttpStatus.BAD_REQUEST)
@ResponseBody
public ErrorResponse processValidationError(MethodArgumentNotValidException ex) {
BindingResult result = ex.getBindingResult();
FieldError error = result.getFieldError();
return processFieldError(error);
}
private ErrorResponse processFieldError(FieldError error) {
ErrorResponse errorResponse = new ErrorResponse();
if (error != null) {
Locale currentLocale = LocaleContextHolder.getLocale();
String msg = messageSource.getMessage(error.getDefaultMessage(), null, currentLocale);
errorResponse.setMessage(msg);
}
return errorResponse;
}
}

Answer 4

我尝试按照其他答案中的建议处理异常，但应用程序无法启动。经过进一步调查，我意识到@ControllerAdvice如何在类org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler中处理此异常：通过受保护的方法protected ResponseEntity<Object> handleHttpMessageNotReadable( HttpMessageNotReadableException ex, HttpHeaders headers, HttpStatus status, WebRequest request)。所以我所做的是在我的控制器建议类中覆盖此方法的行为：

...
protected ResponseEntity<Object> handleHttpMessageNotReadable(
HttpMessageNotReadableException ex, HttpHeaders headers, HttpStatus status,
WebRequest request) {
...
return new ResponseEntity<>("Payload not correctly defined", HttpStatus.BAD_REQUEST);
}