hibernate查询返回结果值为实体时接收方法

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

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