Hibernate分页结构

public List<T> queryFind(String hql,
            Map<String, Object> params, Integer page, Integer rows) {
        if (page == null || page < 1) {
            page = 1;
        }

        if (rows == null || rows < 1) {
            rows = 15;
        }
        Query q = getSession().createQuery(hql);
        if (params != null && !params.isEmpty()) {
            for (String key : params.keySet()) {
                q.setParameter(key, params.get(key));
            }
        }
        return q.setFirstResult((page - 1) * rows).setMaxResults(rows).list();
    }

public long count(String hql) {
        return (Long) getSession().createQuery(hql).uniqueResult();
    }