virtual hosting multiple sites with one web-inf?

is it posibable to virtual host multiple sites that point to differnt jsp and other assets but use the same code in one location? Or would the code have to be spread to all the other virtual host to?

i don't see why you can't deploy a servlet to tomcats lib folder and then setup individual mappings in web.xml in different contexts and make the servlet use getRealPath to get files local to each context.