@Override
	public?boolean?usersLogin(Users?u)?{
		//?TODO?Auto-generated?method?stub
		Transaction?tx?=?null;
		String?sql?=?"";
		try?{
			Session?session?=?MyHibernateSessionFactory.getSessionFactory().getCurrentSession();
			tx?=?session.beginTransaction();
			sql?=?"select?*?from?users?where?username=??and?password=??";
			Query?query?=?session.createSQLQuery(sql);
			query.setParameter(0,?u.getUsername());
			query.setParameter(1,?u.getPassword());
			List?list?=?query.list();
			tx.commit();
			if?(list.size()?>?0)?{
				return?true;
			}?else?{
				return?false;
			}
		}?
		catch?(Exception?ex)?{
			ex.printStackTrace();
			return?false;
		}?
		finally?{
			if?(tx?!=?null)?{
				//?tx.commit();
				tx?=?null;
			}
		}
	}

映射關系沒有配置好。檢查struts.xml