What is web.xml file and what are all things can I do with it?

Question

The web.xml Deployment Descriptor Elements in Oracle\'s BEA WebLogic Server 8.1 Documentation pretty much sums up each element in a web.xml file. But I am also curious about

Answer 1

1. No, there isn't anything that should be avoided
2. The parameters related to performance are not in web.xml they are in the servlet container configuration files (server.xml on tomcat)

3. No. But the default servlet (mapped in a web.xml at a common location in your servlet container) should preferably disable file listings (so that users don't see the contents of your web folders):

   listings true