Spring ControllerAdvice中未处理404异常 [英] 404 Exception not handled in Spring ControllerAdvice

问题描述

我有一个简单的Spring MVC应用程序，我想在其中使用@ControllerAdvice处理所有未映射的url. 这是控制器:

I have a simple Spring MVC application in which I want to handle all the unmapped urls using @ControllerAdvice. Here is the controller:

@ControllerAdvice
public class ExceptionHandlerController {
    @ResponseStatus(HttpStatus.NOT_FOUND)
    @ExceptionHandler(NoHandlerFoundException.class)
    public String handle404() {
        return "exceptions/404page";
    }
}

仍然，每次都会获得Whitelabel错误页面.

Still, every time get Whitelabel Error Page.

我尝试使用RuntimeException.class，HttpStatus.BAD_REQUEST，并使用NoHandlerFoundException扩展了类，但没有用.

I tried using RuntimeException.class, HttpStatus.BAD_REQUEST and extending the class with NoHandlerFoundException but no use.

有什么建议吗?

推荐答案

要使其正常运行，您需要在DispecherServlet上设置throwExceptionIfNoHandlerFound属性.您可以执行以下操作:

To make it work, you need to set throwExceptionIfNoHandlerFound property on DispecherServlet. You can do that with:

spring.mvc.throwExceptionIfNoHandlerFound=true

在application.properties文件中，否则请求将始终转发到默认servlet，并且将引发NoHandlerFoundException.

in application.properties file, otherwise the requests will always be forwarded to the default servlet and NoHandlerFoundException would ever be thrown.

问题是，即使使用此配置，它也不起作用.从文档中:

The problem is, even with this configuration, it doesn't work. From the documentation:

请注意，如果 org.springframework.web.servlet.resource.DefaultServletHttpRequestHandler是 使用，则请求将始终转发到默认servlet 并且在这种情况下永远不会引发NoHandlerFoundException.

Note that if org.springframework.web.servlet.resource.DefaultServletHttpRequestHandler is used, then requests will always be forwarded to the default servlet and NoHandlerFoundException would never be thrown in that case.

因为默认情况下Spring Boot使用org.springframework.web.servlet.resource.DefaultServletHttpRequestHandler，所以您必须使用自己的WebMvcConfigurer覆盖它:

Because Spring Boot uses by default the org.springframework.web.servlet.resource.DefaultServletHttpRequestHandler you'll have to override this using your own WebMvcConfigurer:

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@EnableWebMvc
@Configuration
public class WebConfig implements WebMvcConfigurer {
    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        // Do nothing instead of configurer.enable();
    }
} 

当然，上述情况在您的情况下可能会更复杂.

Of course, the above class might be more complicated in your case.

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