Spring MVC framework is request-driven and is designed around a central Servlet that handles all the HTTP requests and responses. The DispatcherServlet, however, does a lot more than just that. It seamlessly integrates with the IoC container and allows you to use each feature of Spring.
On receiving an HTTP request, the DispatcherServlet consults HandlerMapping (these are the configuration files) to call the appropriate Controller. Then, the controller calls appropriate service methods to set the Model data. It also returns the view name to DispatcherServlet. DispatcherServlet, with the help of ViewResolver, picks up the defined view for the request. Once the view is finalized, the DispatcherServlet passes the Model data to View – where it is finally rendered on the browser.
