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 should be able to open a Connection and open a binary stream you can write to using a PreparedStatement. In our database we store images as blobs and upload them with this methodology. Unfortunately the source isn't something I can post here, but that should give you an idea of where to look.