springmvc-@RequestMapping Mapping Request

@RequestMapping Mapping Requests
1.SpringMVC uses @requestmapping annotations to specify which URL requests can be processed by the controller.
2. @requestmapping can be annotated at the controller's class definition and method definition.
(1). Class definition: Provides preliminary request mapping information. The root directory relative to the Web App.
(2). Provides further subdivision mapping information. Relative to the URL at the class definition.
If @requestmapping is not marked at the class definition,
The URL that is tagged at the method is relative to the Web app's root directory.
3.DispatcherServlet intercepts the request, it is @requestmapping through the controller
The mapping information provided determines the processing method that the request corresponds to.

@Controller @requestmapping ("/hello")  Public class Hellocontroller {    @RequestMapping ("/helloworld")    public  String Helloword () {        System.out.println ("Hello world!" );         return "Success";    }}

code example:

springmvc-@RequestMapping Mapping Request