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.
You also can't prevent me from printing your document to the PDFCreator printer driver and making a PDF out of it. So as the others have already said, trying to control what the user does with the output of your JSP is pointless.