Hello RaviNada,
If you are using
Tomcat, you can accomplish this via the Invoker Servlet (org.apache.catalina.servlets.InvokerServlet) in Tomcat's web.xml file. It allows you to execute servlet classes without needing to map them in web.xml.
However, in general this is not a good practice, since servlet mappings function to prevent users from accessing resources that they shouldn't have access to. Also, hundreds of servlets seems excessive! You may want to consider rolling functionality into fewer servlets, and when you do this, mapping becomes much more manageable.
Edwin