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.