默认情况下，
DispatcherServlet不会抛出
NoHandlerFoundException。您需要启用它。
本
AbstractAnnotationConfigDispatcherServletInitializer应该让你重写如何
DispatcherServlet被创建。这样做并打电话
DispatcherServlet dispatcherServlet = ...; // might get it from super implementationdispatcherServlet.setThrowExceptionIfNoHandlerFound(true);
