servlet and JSP combination and design issue

[Matt]

My task is to generate the list box dynamically based on the input XML file.

I create a JSP page and a servlet.
http://www.myserver.com/page1.jsp

In page1.jsp, I have the following to call servlet from JSP page
<jsp:include page="myproj.TableGeneration"/>

In my case, I think I don't need servlet at all, but just Java Bean
class to generate the table. And JSP page call that Java Bean class.

But in what situation we need the combination of servlet and JSP?

What do you think? Any ideas? Thanks!