无法处理 Spring 中未映射的 urls/404 错误

Question

我想在 Spring MVC 应用程序中处理未映射的 urls/404 错误我找到了一个示例 Here SO Answer，我基于 Java 的配置并以这种方式尝试过

@EnableWebMvc
@Configuration
@ComponentScan(basePackages = { "com.app.controller" })
public class ServletConfigurer extends WebMvcConfigurerAdapter {
    private Properties errorResolverProperties;
    private Properties errorProperties;     
    /// Here I'm configuring <beans as mentioned in SO Answer
    @Bean
    public SimpleUrlHandlerMapping simpleUrlHandlerMapping() {
        SimpleUrlHandlerMapping simpleUrlHandlerMapping = new SimpleUrlHandlerMapping();
        errorResolverProperties = new Properties();
        errorProperties = new Properties();
        errorProperties.put("/**", pageNotFoundController());
        errorResolverProperties.put("mappings", errorProperties);       
        return simpleUrlHandlerMapping;
    }
    // this is my Controller
    @Bean
    public PageNotFoundController pageNotFoundController(){
        return new PageNotFoundController();
    }

    @Bean
    public TilesConfigurer tilesConfigurer() {
        TilesConfigurer tilesConfigurer = new TilesConfigurer();
        tilesConfigurer.setDefinitions("/WEB-INF/tiles_xml/tiles.xml");
        return tilesConfigurer;     
    }       
}

我的控制器是

@Controller
public class PageNotFoundController {
    @ExceptionHandler
    @ResponseStatus(HttpStatus.NOT_FOUND)
    public String handleINFException(PageNotFoundException ex) {
        return "error";
    }
}

最后是

public class PageNotFoundException extends RuntimeException {    

    private static final long serialVersionUID = 1L;

    public PageNotFoundException(String message) {
        super(message);
    }
}

但它总是显示相同的 Apache 错误页面，而不是自定义/我的错误页面。

更新

public class AppInitializer implements WebApplicationInitializer {

    public void onStartup(ServletContext servletContext) throws ServletException {  

        WebApplicationContext rootContext = getWebApplicationContext();
        servletContext.addListener(new ContextLoaderListener(rootContext)); 
        servletContext.setInitParameter("defaultHtmlEscape", "true");
        // add the dispatcher servlet and map it to /
        DispatcherServlet dispatcherServlet = new DispatcherServlet(rootContext);
        dispatcherServlet.setThrowExceptionIfNoHandlerFound(true);
        ServletRegistration.Dynamic dispatcher = servletContext.addServlet(
                "springDispatcher", dispatcherServlet);
        dispatcher.setLoadOnStartup(1);
        dispatcher.addMapping("/");
    }

    private AnnotationConfigWebApplicationContext getWebApplicationContext() {
        AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
        context.setConfigLocation("com.app.config");
        return context;
    }

}

就是这样..

Answer 1

如果你想全局捕获它，你需要一个ControllerAdvice：

@ControllerAdvice
public class ExceptionHandlerController {
    public static final String DEFAULT_ERROR_VIEW = "error";
    public static final String STATUS_CODE = "404";
    public static final String TYPE = "Custom Type";

    @ExceptionHandler(value = {NoHandlerFoundException.class})
    public ModelAndView defaultErrorHandler(HttpServletRequest request, Exception e) {
        ModelAndView mav = new ModelAndView(DEFAULT_ERROR_VIEW);
        mav.addObject("timestamp", new Date());
        mav.addObject("status", STATUS_CODE);
        mav.addObject("type", TYPE);
        mav.addObject("message", String.format("The requested url is: %s", request.getRequestURL()));
        return mav;
    }
}

现在你需要激活，在 404 的情况下抛出异常：

@Autowired
public void configureDispatcher(DispatcherServlet dispatcherServlet){
    dispatcherServlet.setThrowExceptionIfNoHandlerFound(true);
}

将其插入任何@Configuration 注释类中。

就是这样！

更新

把你的班级改成

@Configuration
public class AppInitializer implements WebApplicationInitializer {

    public void onStartup(ServletContext servletContext) throws ServletException {   
        WebApplicationContext rootContext = getWebApplicationContext();
        servletContext.addListener(new ContextLoaderListener(rootContext)); 
        servletContext.setInitParameter("defaultHtmlEscape", "true");
    }

    private AnnotationConfigWebApplicationContext getWebApplicationContext() {
        AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
        context.setConfigLocation("com.app.config");
        return context;
    }

   @Autowired
   public void configureDispatcher(DispatcherServlet dispatcherServlet){
       dispatcherServlet.setThrowExceptionIfNoHandlerFound(true);
   }

}