NamedQuery defined in DAO annotation not found by Hibernate session factory

I use Spring along with Hib开发者_JAVA百科ernate. In my DAO, I defined a NamedQuery which is not found by the session factory, although I have added the package of that DAO to the packagesToScan.

My DAO:

/**
 * 
 */
package org.lalala.service.mytest;

import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;


import  org.lalala.objects.Unit;


@NamedQueries
({
    @NamedQuery
    (
        name="unit.findById",
        query="from Unit u where u.unitid = :unitId"
    )
})
public class MyTestDaoImpl implements MyTestDao
{

    private SessionFactory sessionFactory;


    public MyTestDaoImpl(SessionFactory sessionFactory)
    {
        super();
        this.sessionFactory = sessionFactory;
    }



    /* (non-Javadoc)
     * @see org.lalala.service.mytest.MyTestDao#getRandomUnit()
     */
    @Override
    public Unit getRandomUnit()
    {
        long unitid = 2891;
        try {
            Session session = sessionFactory.getCurrentSession();
            session.beginTransaction();

            Query query = session.getNamedQuery("unit.findById");
            query.setParameter("unitId", unitid);

            Unit unit = (Unit) query.uniqueResult();

            session.getTransaction().commit();

            return unit;
        } catch (Exception e) {
            System.out.println(e.getMessage());
            return null;
        }
    }    

}

And here the Spring config method for providing a session factory:

@Bean
public AnnotationSessionFactoryBean  getSessionFactory() {
    final AnnotationSessionFactoryBean  sessionFactory = new  AnnotationSessionFactoryBean ();
    sessionFactory.setDataSource(getDataSource());

    String[] packages = new String[]{"org.lalala.avalon.service.mytest"};

    sessionFactory.setAnnotatedPackages(packages);

    Properties properties = new Properties();
    properties.put("hibernate.current_session_context_class", "thread");
    sessionFactory.setHibernateProperties(properties);

    return sessionFactory;
}

And here the exception which is thrown:

org.hibernate.MappingException: Named query not known: unit.findById

Because of some similar stackoverflow questions, I replaced the hibernate @NamedQuery annotation with JPA equivalent. Did not help.

you have to put the named queries on your entity, not on the dao

here is an example

If you annotate your DAO with @MappedSuperclass then you can put your NamedQueries in the DAO. Don't forget to add the package of the DAO or the DAO-class itself to the list of annotated packages/classes.