java - Spring MVC 无法处理来自资源处理程序的 404？

Question

我正在使用 Spring MVC 4.3.11.RELEASE 并且有一个用于静态资源的原始资源处理程序。它工作正常 - 对于存在的资源。但是，如果没有，它似乎会向 DispatcherServlet 返回 404，DispatcherServlet 对响应感到满意，因为它找到了处理程序。我有 NoHandlerFoundException 的 ControllerAdvice，它适用于 Controller 但并不意味着处理这种情况。所以 Spring MVC 完全放弃了，我得到了令人讨厌的 Tomcat 404 响应。我找不到为这种情况配置处理的方法，因此我无法返回正确的响应。

为 Spring 启用 TRACE 后，您会看到此类请求的以下内容:

2018-03-15T14:22:05,361 TRACE [] DispatcherServlet          - Bound request context to thread: org.apache.catalina.connector.RequestFacade@597aa896
2018-03-15T14:22:05,361 DEBUG [] DispatcherServlet          - DispatcherServlet with name 'dispatcher' processing GET request for [/creditcard/static/doh]
2018-03-15T14:22:05,361 TRACE [] DispatcherServlet          - Testing handler map [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping@4b720a14] in DispatcherServlet with name 'dispatcher'
2018-03-15T14:22:05,361 DEBUG [] questMappingHandlerMapping - Looking up handler method for path /static/doh
2018-03-15T14:22:05,364 DEBUG [] questMappingHandlerMapping - Did not find handler method for [/static/doh]
2018-03-15T14:22:05,364 TRACE [] DispatcherServlet          - Testing handler map [org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping@67db7dde] in DispatcherServlet with name 'dispatcher'
2018-03-15T14:22:05,364 TRACE [] BeanNameUrlHandlerMapping  - No handler mapping found for [/static/doh]
2018-03-15T14:22:05,364 TRACE [] DispatcherServlet          - Testing handler map [org.springframework.web.servlet.handler.SimpleUrlHandlerMapping@4698270f] in DispatcherServlet with name 'dispatcher'
2018-03-15T14:22:05,364 DEBUG [] SimpleUrlHandlerMapping    - Matching patterns for request [/static/doh] are [/static//**]
2018-03-15T14:22:05,364 DEBUG [] SimpleUrlHandlerMapping    - URI Template variables for request [/static/doh] are {}
2018-03-15T14:22:05,364 DEBUG [] SimpleUrlHandlerMapping    - Mapping [/static/doh] to HandlerExecutionChain with handler [ResourceHttpRequestHandler [locations=[ServletContext resource [/static//]], resolvers=[org.springframework.web.servlet.resource.PathResourceResolver@20537c7e]]] and 1 interceptor
2018-03-15T14:22:05,364 TRACE [] DispatcherServlet          - Testing handler adapter [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter@442b38d3]
2018-03-15T14:22:05,364 TRACE [] DispatcherServlet          - Testing handler adapter [org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter@3128c8a7]
2018-03-15T14:22:05,364 DEBUG [] DispatcherServlet          - Last-Modified value for [/creditcard/static/doh] is: -1
2018-03-15T14:22:05,364 TRACE [] ResourceHttpRequestHandler - Applying "invalid path" checks to path: doh
2018-03-15T14:22:05,364 TRACE [] PathResourceResolver       - Resolving resource for request path "doh"
2018-03-15T14:22:05,364 TRACE [] PathResourceResolver       - Checking location: ServletContext resource [/static//]
2018-03-15T14:22:05,364 TRACE [] PathResourceResolver       - No match for location: ServletContext resource [/static//]
2018-03-15T14:22:05,364 TRACE [] ResourceHttpRequestHandler - No matching resource found - returning 404
2018-03-15T14:22:05,364 DEBUG [] DispatcherServlet          - Null ModelAndView returned to DispatcherServlet with name 'dispatcher': assuming HandlerAdapter completed request handling
2018-03-15T14:22:05,364 TRACE [] DispatcherServlet          - Cleared thread-bound request context: org.apache.catalina.connector.RequestFacade@597aa896
2018-03-15T14:22:05,364 DEBUG [] DispatcherServlet          - Successfully completed request

想法？

Answer 1

我遇到了同样的问题。我的解决方案如下:

• spring.resources.add-mappings=false(在 yaml 或 application.properties 中)

• 在 WebMvcConfigurer 的“addResourceHandlers”方法的配置中添加所有映射，例如:

  @Configuration
  public class WebMvcConfig implements WebMvcConfigurer {
      @Override
      public void addResourceHandlers(ResourceHandlerRegistry registry) {
          registry.addResourceHandler("/home.html**")
                  .addResourceLocations("classpath:/static/views/home/");
      }
  
      @Override
      public void configureDefaultServletHandling(
                DefaultServletHandlerConfigurer configurer) {
          // DO not enable this ! 
          // configurer.enable();
          // Remove this method! 
      }
  }
  

• 必须删除默认的 servlet 处理程序，因为它将尝试处理并返回状态 404，但绝不会抛出 NoHandlerFoundException

• 添加 GlobalExceptionHandler Controller 建议:

  @ControllerAdvice
  public class GlobalExceptionHandler {
      @ExceptionHandler(NoHandlerFoundException.class)
      public String handleNotFoundError(Exception ex) {
          return "redirect:/your404page";
      }
  }
  

希望对您有所帮助!对我来说它完美无缺!