操作数据库（getHibernateTemplate()的使用）

public class AddUserDaoImpl  extends HibernateDaoSupport implements AddUserDao {

public void saveUserInfoToDB(UserInfo uio) {
//       session.beginTransaction();
//       session.save(uio);
//       session.getTransaction().commit();
this.getHibernateTemplate().saveOrUpdate(uio);
}

public List queryUserInfoToDB(String userName) {
List returnList = new ArrayList();
try {

//			returnList = session.createQuery("from UserInfo").list();

if(userName ==null || "".equals(userName)){
returnList = this.getHibernateTemplate().find("from UserInfo");
}else{
Session session = HibernateUtils.openSession();
Transaction trans = session.beginTransaction();
Query query = session.createQuery("from UserInfo where username =:userName");
query.setParameter("userName", userName);
returnList = query.list();
trans.commit();
HibernateUtils.closeSession();
}
} catch (HibernateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return returnList;
}

}