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.
Look in the SimpleJdbcDaoSupport class that you are extending.
Now, I will point out this, I would not extend that class. At the point where you go "extends SimpleJdbcDaoSupport" you are now tightly coupled with a Spring class.
The best way to do JDBC Repositories is to inject a SimpleJdbcTemplate into your Repository, and use the template. In your xml you will declare a SimpleJdbcTemplate to inject into your JdbcProductDao, which would require you to create a private instance variable to hold it, and write a setter method to inject it.