Spring MVC Flow Of execution
1. After submit the html, request goes through DispatcherServlet
2. DispatcherServlet reads Spring-servlet.xml file
3. DispatcherServlet asks HandlerMapping about Specific Controller
4. HandlerMapping search for specific controller. and returns to DispatcherServlet with req,res objects
5. Controller returns modelandView Object and return to DispatcherServlet
6. DispatcherServlet calls ViewResolver for Result page of request
7. ViewResolver reads modelandview Object and finds the result page
8. Finally output will send data to View page/ Success page
