hibernate session 连接释放问题

项目编写出现问题：登陆页面进行登陆时，能成功登陆，但是注销后重新登陆3次以上时，后台控制台出现hibernate closing 的问题。怀疑是session factory 和session 出现没有正确关闭session的问题。于是上网查的以下资料

原代码：dao层：

@Repository
public class tblUserDaoImpl  implements tblUserDao{

	@Autowired
	private SessionFactory sf;

	@Override
	public List<TblUser> queryOneUser(TblUser user) {

		String username = user.getUsername();
		String password = user.getPassword();
		String hql = "from TblUser t where t.username=? and t.password=?";
		Query query = sf.openSession().createQuery(hql);
		query.setString(0, username);
		query.setString(1, password);
		List<TblUser> resultList = query.list();
		return resultList;

}

目前从网上查找的解决方法是：

1.让dao层继承hibernateDaoSupport类

2.此时session factory无法注入的情况，用

	@Autowired  
	public void setMySessionFactory(SessionFactory sessionFactory){  
	    super.setSessionFactory(sessionFactory);  
	}

3.新的类中的方法不能使用query，所以更改查询方式

综上，新的代码为

@Repository
public class tblUserDaoImpl extends HibernateDaoSupport implements tblUserDao{
 
	private SessionFactory sf;
	
	//登录用，根据用户名和密码进行查找
	@Override
	public List<TblUser> queryOneUser(TblUser user) {
		String username = user.getUsername();
		String password = user.getPassword();
		Session session =  super.getSession();
		String hql = "from TblUser where username = "" +username + "" and password="+password;
		List<TblUser> resultList = session.createQuery(hql).list();
		releaseSession(session);
		return resultList;

	}

	
	@Autowired  
	public void setMySessionFactory(SessionFactory sessionFactory){  
	    super.setSessionFactory(sessionFactory);  
	}


	
	

}