Probably wouldn't be a problem, especially if you do it "right"
In this case "right" means adopting JSP 2.0 (the most modern version) and not putting
any Java whatsoever on the pages.
All the Java you know will be useful in writing
servlets, beans and the other non-JSP parts of a web application, and the JSP aspect will entail coming to terms with using JSP as a templating language for the HTML pages.
I'd avoid older references that would have you put Java scriplets on the pages. That will lead you down and old, and no longer preferred, road.
[ September 29, 2006: Message edited by: Bear Bibeault ]