Hibernate之检索单条记录

	@Override
	public WechatMaterial findByMediaId(String mediaId) {
		String hql = "select bean from WechatMaterial bean where mediaId = :mediaId";
		Query query = getSession().createQuery(hql);
		query.setParameter("mediaId", mediaId);
		query.setMaxResults(1);
		return (WechatMaterial) query.uniqueResult();
	}