Spring provides HibernateDAOSupport class from which we extend our DAO class.

If I want to update 2 tables in one transaction using my DAO class that extends HibernateDAOSupport can I do the following

this code is inside one of methods of my DAO class that extends HibernateDAOSupport
{

RPRTReferral ref = new RPRTReferral();
//
//
RPRTReferralComment comment = new RPRTReferralComment();
comment.setReferral(ref);

Transaction tx = getHibernateTemplate().getSessionFactory().getCurrentSession().beginTransaction();

getHibernateTemplate().save(ref);
if ( comment != null ) getHibernateTemplate().save(comment);

tx.commit();

}

Assume ref and comment are those 2 objects that i want to save in 1 transaction.
Both of my objects wil be under one transaction? [/b]

Yes, they should run in the same transaction. Now the only problem is that you are inserting business logic code into your DAO! ;D