Spring Boot @RestControllerAdvice 未捕获自定义异常

Question

I'm using Spring Boot 2.3.1 and I'm having trouble with exceptions.我正在使用 Spring Boot 2.3.1，我遇到了异常问题。 I want to use a @RestControllerAdvice class to catch exceptions at a global level.我想使用@RestControllerAdvice class 在全局级别捕获异常。 I am able to catch validation errors and return a custom error response, but Spring seems to be ignoring my handlePhotoNotFoundException method.我能够捕获验证错误并返回自定义错误响应，但 Spring 似乎忽略了我的handlePhotoNotFoundException方法。 Here is my @RestControllerAdvice class:这是我的@RestControllerAdvice class：

DmsResponseEntityExceptionHandler.java DmsResponseEntityExceptionHandler.java

@RestControllerAdvice
public class DmsResponseEntityExceptionHandler extends ResponseEntityExceptionHandler {

    @Override
    protected ResponseEntity<Object> handleMethodArgumentNotValid(MethodArgumentNotValidException ex,
            HttpHeaders headers, HttpStatus status, WebRequest request) {
        
        ValidationErrorResponse response = new ValidationErrorResponse();
        response.setHasErrors(true);
        
        ex.getBindingResult().getAllErrors().forEach(error -> {
            ValidationErrorModel errorModel = new ValidationErrorModel();
            errorModel.setFieldName(((FieldError) error).getField());
            errorModel.setRejectedValue(((FieldError) error).getRejectedValue());
            errorModel.setErrorMessage(error.getDefaultMessage());
            errorModel.setErrorCode(error.getCode());
            response.getErrors().add(errorModel);
        });
        return ResponseEntity.badRequest().body(response);
    }

    @ExceptionHandler(PhotoNotFoundException.class)
    @ResponseStatus(value = HttpStatus.NOT_FOUND)
    public ApiErrorResponse handlePhotoNotFoundException(PhotoNotFoundException ex, HttpStatus status) {
        
        ApiErrorResponse apiError = new ApiErrorResponse(HttpStatus.NOT_FOUND, 404, ex.getLocalizedMessage(), ex.getMessage());

        return apiError;
    }
}

Here is the method where I am throwing the exception:这是我抛出异常的方法：

PhotoStorageServiceImp.java PhotoStorageServiceImp.java

@Override
public Resource getThumbnailPhotoByIndex(int index, Vehicle vehicle, DealerAccount account) {
    logger.info("LOADING THUMBNAIL!!");
    Photo photo = vehicle.getImages().stream().filter(image -> {
        return image.getIndexNumber() == index;
    }).findFirst().orElseGet(() -> new Photo());
    
    return loadPhotoAsResource(photo.getThumbnailFileName(), vehicle, account);
}

@Override
    public Resource loadPhotoAsResource(String fileName, Vehicle vehicle, DealerAccount account) throws PhotoNotFoundException {
        
        logger.info(fileName);
        logger.info(account.getId().toString());
        
        initDirectories(vehicle.getId(), account.getId());
        
        Path file = fileUploadDirectory.resolve(fileName).normalize();
        logger.info("file " + file.toString());

        Optional<Resource> optionalResource = Optional.empty();
        try {
            optionalResource = Optional.of(new UrlResource(file.toUri()));
        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
        Resource resource = optionalResource.orElseThrow(() -> new PhotoNotFoundException("Photo not found!!!"));

        if(resource.exists() && resource.isReadable()) {
            return resource;
        } else {
            throw new PhotoNotFoundException("Error retrieving photo!!!");
        }
    }

PhotoUploadController.java PhotoUploadController.java

@GetMapping("/{fileName:.+}")
public ResponseEntity<?> getPhoto(
    @PathVariable String fileName, 
    @PathVariable Long vehicleId,
    @RequestParam("size") String size,
    HttpServletRequest request,
   @AuthenticationPrincipal DmsUserDetails dmsUser) {

Vehicle vehicle = vehicleService.findVehicleById(vehicleId);

Optional<Resource> optionalFile = Optional.empty();
Resource resource = null;

switch (size) {
case "thumbnail":
    resource = photoUploadService.getThumbnailPhotoByIndex(0, vehicle, dmsUser.getDealerAccount());
    break;
case "featured":
    optionalFile = photoUploadService.getFeaturedPhotoByIndex(0, vehicle, dmsUser.getDealerAccount());
    break;
case "gallery":
    optionalFile = photoUploadService.getGalleryPhotoByIndex(0, vehicle, dmsUser.getDealerAccount());
    break;
default: 
    
}
logger.info("file resource: " + fileName);



Resource file = optionalFile.orElseThrow(() -> new PhotoNotFoundException("Photo with filename ["+fileName+"] not found"));

// Try to determine file's content type
String contentType = null;
try {
    contentType = request.getServletContext().getMimeType(file.getFile().getAbsolutePath());
} catch (IOException ex) {
    logger.info("Could not determine file type.");
}

// Fallback to the default content type if type could not be determined
if(contentType == null) {
    contentType = "application/octet-stream";
}

return ResponseEntity.ok()
        .header(HttpHeaders.CONTENT_DISPOSITION, "inline; filename=\" + file.getFilename() + \"\\\"")
        .contentType(MediaType.parseMediaType(contentType))
        .body(file);

} }

I am getting the error Error retrieving photo!!!我收到Error retrieving photo!!! but with a stacktrace and the 500 error.但有堆栈跟踪和 500 错误。 For some reason, Spring is ignoring my @ExceptionHandler annotation in the @RestControllerAdvice class. What I would like to do is quietly log the error, return a message to the user that the image isn't available, then return a URL to a "image is missing" photo.出于某种原因，Spring 忽略了我在@RestControllerAdvice class 中的@ExceptionHandler注释。我想做的是安静地记录错误，向用户返回一条消息，表明图像不可用，然后将 URL 返回给“图像丢失”照片。

I'm very new to working with exceptions in Java, so help would be greatly appreciated!我对 Java 中的异常处理还很陌生，非常感谢您的帮助！

EDIT编辑

Here's the full stack track:这是完整的堆栈轨道：

com.webbdealer.dms.main.exceptions.PhotoNotFoundException: Error retrieving photo!!!
    at com.webbdealer.dms.main.services.PhotoStorageServiceImp.loadPhotoAsResource(PhotoStorageServiceImp.java:177) ~[classes/:na]
    at com.webbdealer.dms.main.services.PhotoStorageServiceImp.getThumbnailPhotoByIndex(PhotoStorageServiceImp.java:188) ~[classes/:na]
    at com.webbdealer.dms.main.controllers.api.v1.PhotoUploadController.getPhoto(PhotoUploadController.java:120) ~[classes/:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:879) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.36.jar:9.0.36]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:320) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:126) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:90) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:118) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:158) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilterInternal(BasicAuthenticationFilter.java:204) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.web.filter.CorsFilter.doFilterInternal(CorsFilter.java:92) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.header.HeaderWriterFilter.doHeadersAfter(HeaderWriterFilter.java:92) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:77) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:215) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:178) ~[spring-security-web-5.3.3.RELEASE.jar:5.3.3.RELEASE]
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:373) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1590) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
    at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

UPDATE更新

Okay, I removed the HttpStatus from the method and it works!!好的，我从方法中删除了HttpStatus ，它起作用了！！ Thank you so much for the help!十分感谢你的帮助！

Now my error response is clean!现在我的错误响应是干净的！

Answer 1

In the Exceptionhandler method:在Exceptionhandler处理程序方法中：


@ExceptionHandler(PhotoNotFoundException.class)
@ResponseStatus(value = HttpStatus.NOT_FOUND)
public ApiErrorResponse handlePhotoNotFoundException(PhotoNotFoundException ex, HttpStatus status) 
{      
  ApiErrorResponse apiError = new ApiErrorResponse(HttpStatus.NOT_FOUND, 404, ex.getLocalizedMessage(), ex.getMessage());
 
  return apiError;
}

The parameter HttpStatus status is causing the issue.参数HttpStatus status导致了问题。 Remove this extra parameter.删除这个额外的参数。

From docs , the allowed parameters are:从docs ，允许的参数是：

An exception argument: declared as a general Exception or as a more specific exception.异常参数：声明为一般异常或更具体的异常。 This also serves as a mapping hint if the annotation itself does not narrow the exception types through its value().如果注释本身不通过其 value() 缩小异常类型，这也用作映射提示。

Request and/or response objects (typically from the Servlet API).请求和/或响应对象（通常来自 Servlet API）。 You may choose any specific request/response type, eg ServletRequest / HttpServletRequest.您可以选择任何特定的请求/响应类型，例如 ServletRequest / HttpServletRequest。

Session object: typically HttpSession. Session object：通常是 HttpSession。 An argument of this type will enforce the presence of a corresponding session. As a consequence, such an argument will never be null. Note that session access may not be thread-safe, in particular in a Servlet environment: Consider switching the "synchronizeOnSession" flag to "true" if multiple requests are allowed to access a session concurrently.这种类型的参数将强制存在相应的 session。因此，这样的参数永远不会是 null。请注意，session 访问可能不是线程安全的，特别是在 Servlet 环境中：考虑切换“synchronizeOnSession”如果允许多个请求同时访问 session，则标记为“true”。

WebRequest or NativeWebRequest. WebRequest 或 NativeWebRequest。 Allows for generic request parameter access as well as request/session attribute access, without ties to the native Servlet API.允许通用请求参数访问以及请求/会话属性访问，与本机 Servlet API 无关。

Locale for the current request locale (determined by the most specific locale resolver available, ie the configured LocaleResolver in a Servlet environment).当前请求区域设置的区域设置（由可用的最具体的区域设置解析器确定，即在 Servlet 环境中配置的 LocaleResolver）。

InputStream / Reader for access to the request's content. InputStream / Reader 用于访问请求的内容。 This will be the raw InputStream/Reader as exposed by the Servlet API.这将是 Servlet API 公开的原始 InputStream/Reader。

OutputStream / Writer for generating the response's content.用于生成响应内容的 OutputStream / Writer。 This will be the raw OutputStream/Writer as exposed by the Servlet API.这将是 Servlet API 公开的原始 OutputStream/Writer。

Model as an alternative to returning a model map from the handler method. Model 作为从处理程序方法返回 model map 的替代方法。 Note that the provided model is not pre-populated with regular model attributes and therefore always empty, as a convenience for preparing the model for an exception-specific view.请注意，提供的 model 未预填充常规 model 属性，因此始终为空，以便为特定异常视图准备 model。

Spring Boot @RestControllerAdvice 未捕获自定义异常

问题描述

1 个解决方案

解决方案1
3 已采纳 2020-09-03 03:07:02

Spring Boot @RestControllerAdvice 未捕获自定义异常

问题描述

1 个解决方案

解决方案1 3 已采纳 2020-09-03 03:07:02

解决方案1
3 已采纳 2020-09-03 03:07:02