this is working now, i did R &D and re-build the project, i can see the files are complied on classes folder.
One more problem , when i hit the action button on submit , it calls servlet and servlet name with URL mapping are configured on web.xml , not sure getting the error 404
HTTP Status 404 -
type Status report
description The requested resource is not available.
web.xml servlet are as below -
what is the problem that web container doesn't find the ControllerServlet.class from classes folder under the package?