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.
PS: If you're working with a binary Excel file, you'll probably need to stream the data to the browser using a servlet (JSPs don't do this well). In our CodeBarn there is a servlet example called SimpleStream that shows how to do this.