org.springframework.web.servlet.DispatcherServlet#setThrowExceptionIfNoHandlerFound ( )源码实例Demo

public static void main(String[] args)
{
    checkEnvironmentVariable("OAUTHCLIENTID");
    checkEnvironmentVariable("OAUTHCLIENTSECRET");

    if (!stop)
    {
        ApplicationContext ctx = SpringApplication.run(StartHereApplication.class,
                                                       args);

        DispatcherServlet dispatcherServlet = (DispatcherServlet) ctx.getBean("dispatcherServlet");
        dispatcherServlet.setThrowExceptionIfNoHandlerFound(true);
    }
}
 

public static void main(String[] args)
{
    checkEnvironmentVariable("OAUTHCLIENTID");
    checkEnvironmentVariable("OAUTHCLIENTSECRET");

    if (!stop)
    {
        ApplicationContext ctx = SpringApplication.run(com.lambdaschool.starthere.StartHereApplication.class, args);

        DispatcherServlet dispatcherServlet = (DispatcherServlet) ctx.getBean("dispatcherServlet");
        dispatcherServlet.setThrowExceptionIfNoHandlerFound(true);
    }
}
 

@Bean
public ServletRegistrationBean dispatcherRegistration(DispatcherServlet dispatcherServlet) {
    ServletRegistrationBean registration = new ServletRegistrationBean(dispatcherServlet);
    registration.setMultipartConfig(multipartConfigElement());
    dispatcherServlet.setThrowExceptionIfNoHandlerFound(true);
    return registration;
}
 

/**
 * Checks if servlet is Dispatcher servlet implementation and then fetches
 * the WebMvcProperties from spring container and configure the dispatcher
 * servlet.
 *
 * @param servlet input servlet implementation
 */
private static void customize(Servlet servlet) {
    if (servlet instanceof DispatcherServlet) {
        DispatcherServlet dispatcherServlet = (DispatcherServlet) servlet;
        WebMvcProperties mvcProperties
                = dispatcherServlet.getWebApplicationContext().getBean(WebMvcProperties.class);
        dispatcherServlet.setThrowExceptionIfNoHandlerFound(mvcProperties.isThrowExceptionIfNoHandlerFound());
        dispatcherServlet.setDispatchOptionsRequest(mvcProperties.isDispatchOptionsRequest());
        dispatcherServlet.setDispatchTraceRequest(mvcProperties.isDispatchTraceRequest());
    }
}
 

private static DispatcherServlet generateDispatcherServlet(WebApplicationContext context) {
    DispatcherServlet dispatcherServlet = new DispatcherServlet(context);
    // By setting dispatcherServlet.setThrowExceptionIfNoHandlerFound() to true we get a NoHandlerFoundException
    //      thrown for a 404 instead of being forced to use error pages.
    dispatcherServlet.setThrowExceptionIfNoHandlerFound(true);
    return dispatcherServlet;
}
 

private static DispatcherServlet generateDispatcherServlet(WebApplicationContext context) {
    DispatcherServlet dispatcherServlet = new DispatcherServlet(context);
    // By setting dispatcherServlet.setThrowExceptionIfNoHandlerFound() to true we get a NoHandlerFoundException thrown
    //      for a 404 instead of being forced to use error pages. The exception can be directly handled by Backstopper
    //      which is much preferred - you don't lose any context that way.
    dispatcherServlet.setThrowExceptionIfNoHandlerFound(true);
    return dispatcherServlet;
}
 

private void throwExceptionIfNoHandlerFound(final MockMvc mvc) throws NoSuchFieldException, IllegalAccessException {
    final Field field = MockMvc.class.getDeclaredField("servlet");
    field.setAccessible(true);
    final DispatcherServlet servlet = (DispatcherServlet) field.get(mvc);
    servlet.setThrowExceptionIfNoHandlerFound(true);
}
 

/** A Molgenis common web application initializer */
protected void onStartup(ServletContext servletContext, Class<?> appConfig, int maxFileSize) {
  // Create the 'root' Spring application context
  AnnotationConfigWebApplicationContext rootContext = new AnnotationConfigWebApplicationContext();
  rootContext.registerShutdownHook();
  rootContext.setAllowBeanDefinitionOverriding(false);
  rootContext.register(appConfig);

  // Manage the lifecycle of the root application context
  servletContext.addListener(new ContextLoaderListener(rootContext));

  // Register and map the dispatcher servlet
  DispatcherServlet dispatcherServlet = new DispatcherServlet(rootContext);
  dispatcherServlet.setDispatchOptionsRequest(true);
  // instead of throwing a 404 when a handler is not found allow for custom handling
  dispatcherServlet.setThrowExceptionIfNoHandlerFound(true);

  ServletRegistration.Dynamic dispatcherServletRegistration =
      servletContext.addServlet("dispatcher", dispatcherServlet);
  if (dispatcherServletRegistration == null) {
    LOG.warn(
        "ServletContext already contains a complete ServletRegistration for servlet 'dispatcher'");
  } else {
    final long maxSize = (long) maxFileSize * MB;
    dispatcherServletRegistration.addMapping("/");
    dispatcherServletRegistration.setMultipartConfig(
        new MultipartConfigElement(null, maxSize, maxSize, FILE_SIZE_THRESHOLD));
    dispatcherServletRegistration.setAsyncSupported(true);
  }

  // Add filters
  Dynamic browserDetectionFiler =
      servletContext.addFilter("browserDetectionFilter", BrowserDetectionFilter.class);
  browserDetectionFiler.setAsyncSupported(true);
  browserDetectionFiler.addMappingForUrlPatterns(
      EnumSet.of(DispatcherType.REQUEST, DispatcherType.ASYNC), false, "*");

  Dynamic etagFilter = servletContext.addFilter("etagFilter", ShallowEtagHeaderFilter.class);
  etagFilter.setAsyncSupported(true);
  etagFilter.addMappingForServletNames(
      EnumSet.of(DispatcherType.REQUEST, DispatcherType.ASYNC), true, "dispatcher");

  // enable use of request scoped beans in FrontController
  servletContext.addListener(new RequestContextListener());

  servletContext.addListener(HttpSessionEventPublisher.class);
}