Java and Spring. Transactional annotation @Transactional

Question

I want to Remove begin and commit transactions from DAO class , and I need to use Transactional annotation. How it should be done? Now , exception is org.hibernate.HibernateE

Answer 1

After setting a correct transaction manager, just tried to move the @Transactional annotation to the method on the implemented class

    @Repository
    public class CoursesDAOImpl implements CoursesDAO {

    @Autowired
    private SessionFactory sessionFactory;

    @Transactional 
public Course createCourse(Course course) {