J2EE/JSP-based sitemap generator available?

I want to setup a "dynamic" sitemap for my company's website, similar
in nature to the one that I have for my personal website
(http://www.dylanomahony.com/sitemap_gen_spider.asp). My site is
created using ASP, however, and there are already scripts freely
available to create a sitemap on-the-fly using VBScript/ASP (I chose
http://www.iteam5.net/francesco/sitemap_gen, BTW, and it works like a
champ, if anybody's looking for a recommendation).

I was wondering if there was an equivalent JSP/Servlet-based solution
already developed that I could, ahem, leverage? I've searched this
forum and the Google-recommended tools page, but have come up with
nothing that fills this description. I thought it would be a quite
in-demand tool, but obviously not.

If the worst comes to the worst I'll just throw something together
myself, but it would be great if I there's anything out there that I
could start with. Even a snippet of code from any of the Java
applet-based solutions would be great - not sure if there are truly
open-source options out there.

Cheers -- Dylan