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

Deployment descriptor file "web.xml" : Through the proper use of the deployment descriptor file, web.xml, you can control many aspects of the Web application behavior, from preloading servlets, to restricting resource access, to controlling session time-outs.

web.xml : is used to control many facets of a Web application. Using web.xml, you can assign custom URLs for invoking servlets, specify initialization parameters for the entire application as well as for specific servlets, control session timeouts, declare filters, declare security roles, restrict access to Web resources based on declared security roles, and so on.