We are developing a project it just having JSP and Servlet, but we have to modify that project by implementing MVC design pattern please suggest me how to do that. That project contains JSP for view and in backend all servlets are working.
It seems you have the View and Controller in place all you need is a Model ...
Dont write all the business logic in Servlets thats your controller....it should be only use for delegation from View to Controller....All the business logic should come from a pojo ..class thats your Model...try calling these classes from you are Servlet and Map the same in your JSP's as well...