This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
PDFs are binary data, so you'd use a BLOB field. Having to do with I/O and DB operations, you wouldn't do this in a JSP, but in a servlet. A package like Apache Commons FileUpload makes the file upload part quite easy.