11.0 SPRING MVC

SPRING MODEL VIEW CONTROLLER

• Client send a reqeust through web Application.
• DispatcherServlet which is the first controller receives the request.
• DispatcherServlet consults the HandlerMapping to identify the particular controller for the given URL.
• HandlerMapping identifies the controller for the given request and sends to the DispatcherServlet.
• DispatcherServlet will call the handleRequest(request,response) method on Controller. A Controller is developed by writing a simple java class which implements Controller interface or extends its adapter class.
• Controller will call the business method according to business requirement.
• Service class will call the DAO class method for business data.
• DAO interacts with DB to get data.
• DAO returns same data to service.
• Fetched data will be processed according to business requirement and return results to Controller.
• The Controller returns the Model and View in the form of Object back to the Controller i.e, DispatcherServlet.
• The front controller i.e, DispatcherServlet then tries to resolve the actual View which may be JSP,velocity or Free Marker by consulting the View Resolver Object.
• ViewResolver selected view is rendred back to the DispatcherServlet.
• DispatcherServletconsult the particular view with the model.
• View executes and returns HTML output to the DispatcherServlet.
• DispatcherServlet will sends the output to the Browser.