常用的HQL语句
1.hql更新 String hql = "update PhUser set realName=?"; int row=this.getSession().createQuery(hql).setString(0, "小李想").executeUpdate(); PhUser 类名 2.hql删除 String hql = "delete PhUser a where a.userId=2"; int row=this.getSession().createQuery(hql).executeUpdate(); 还有个这种的格式: final String hql = "delete PhRoleFunction as a where a.roleId = " + roleId; this.getHibernateTemplate().execute(new HibernateCallback() { public Object doInHibernate(Session session) throws HibernateException, SQLException { return session.createQuery(hql).executeUpdate(); } });更新也可以写成这样的格式3.hql单表查询 String hql = "from PhUser a where a.userId=" + userId; List list = this.getHibernateTemplate().find(hql);4.hql多表查询 (1)String hql = "select new map(a.CUId as CUId,a.unitName as unitName,b.CUFId as CUFId,b.UFName as UFName) from PhCorrelativeUnit a,PhCorrelativeUnitFunction b where a.CUId=b.CUId"; List list = this.getHibernateTemplate().find(hql); 多个表的字段放到map中,map的键值就是as后面的别名,如果没有as就是字段名 (2) String hql = "select new com.phantom.appeal.action.bean.DealPaper(a.id as id,a.billId as billId,a.state as state,a.creator as creator,a.createtime as createtime ,b.eventContent as eventContent ,c.realName as realName,b.billCode as billCode,b.citName as citName ) from PhDealBill a,PhAcceptBill b,PhUser c where a.departmentId="+ billid+ " and a.state=0 and a.billId=b.billId and a.creator =c.userId order by a.billId"; return this.getHibernateTemplate().find(hql); 另外就是写一个类,对应你要查询的字段,这里的类名是new com.phantom.appeal.action.bean.DealPaper,里面对应查询的字段名5.得到记录数 String hql = "select count(*) from PhUser"; List list = this.getHibernateTemplate().find(hql); return ((Long) list.get(0)).intValue();
页:
[1]