Hibernate return single value query

Query q = session.createQuery("select count(*) from table");

Integer i = (Integer)q.uniqueResult();

 

  That's it, make sure your hql statement only returns one object, otherwise calling uniqueResult() will throw an exception

 

1 The session created by getCurrentSession will be bound to the current thread, while openSession will not.

2 The thread created by getCurrentSession will be closed automatically after transaction rollback or transaction commit, while openSession must be closed manually

Query query = this.getSessionFactory().getCurrentSession().createSQLQuery(sb.toString());

return query.list().size();

 

When the above one throws an exception, you can try the next one:

 

Session session=this.getHibernateTemplate().getSessionFactory().openSession();

return session.createQuery(hql).executeUpdate();