StringBuffer hql = new StringBuffer        (" select r.rolename as rolename, r.username as username from RoleHejian r ");List
    
      list = roleHejianDao.createQuery(hql.toString()).		setResultTransformer(Transformers.aliasToBean(RoleHejian.class)).list();
    

createQuery(hql.toString()).setResultTransformer(Transformers.aliasToBean(RoleHejian.class)).list();