How change my view layer from JSP to Vaadin ?

Hi all!!

I have a J2ee project and now we want change the view layer to vaadin.

We have a main.jsp with all layout…
request.getRequestDispatcher(forwardPage).include(request, response);

forwardPage = project_lst.jsp

this at a xml

we work with a framework very similar to struts

now I question

how I can change my view layer with less impact as possible ?

Is there one way (confgure web.xml or another implementation) to change “only” this:
to this

No. Directly that is not possible. You must tread a Vaadin application as separate servlet. The servlet takes the Java class as init-param in web.xml. This is more thoroughly explained in the Book of Vaadin: