Spring framework

Spring, a very popular framework for web application development, follows two architectural patterns for its design: the front controller pattern and the MVC pattern. The architecture is depicted in the following graphic:

The Dispatcher Servlet component is the single servlet that functions as the front controller and handles all incoming requests. The Dispatcher Servlet then calls Handler Mapping in order to find an object that could service the request. The request is then given to the controller object so that the Dispatcher becomes free to perform functions associated with the fulfilment of business logic as per the user's request. The controller object returns an encapsulated object that contains the model object and view object. This is represented by the ModelandView class. If the ModelandView contains the logical name of the view, the Dispatcher Servlet calls the View Resolver to get details of the actual view object from its logical name. The Dispatcher Servlet then gives the model object to the view object so that it can be displayed to the end user.