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.
Please specify whether you had added to WEB-INF/lib folder
is it there in the java build path ....(did you added it to there) just check this also eclipse tutorial
export the project as a war file and extract the contents of the war file if your exported library is there in WEB-INF/lib folder then it should work ........... try upload that war file into your server and see whether it is working properly....