Hibernate的查询 HQL查询

HQL参数为分两种，一种是占位符方式：(注意是从 0 开始)

 String hql = "from User u where u.id=?";
     Query query = session.createQuery(hql);
     query.setParameter(0, 2);
     List<User> user = query.list();

HQL参数为分两种，第二种是使用参数形式：

  String hql = "from User u where u.id=:id";
     Query query = session.createQuery(hql);
     query.setInteger("id", 2);
     List<User> user = query.list();

HQL语句实现分页：

  String hql = "from User u";
     Query query = session.createQuery(hql);
     query.setFirstResult(0);
     query.setMaxResults(5);
     List<User> user = query.list();

HQL语句实现分组和排序：

  String hql = "from User u group by name order by id desc";
     Query query = session.createQuery(hql);
     List<User> user = query.list();