This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
If you can convert it to something which JDOM can read from -- like an InputStream, for example -- then yes. And there is a way to get an InputStream from a PreparedStatement; check out the documentation for that class.