This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Yes Bear is right, if you are not using annotation base servlet then you have to mention your servlet along with the mapping in the web.xml file
If you will use eclipse like any ide for creating your servlet that part done automatically by the IDE.