hibernate 多条件与查询：Restrictions

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1、hibernate查询语句组装：

添加两个条件：

Criteria criteria = this.createCriteria();

criteria.add(Restrictions.or(Restrictions.eq("name","a"),Restrictions.eq("name","b")));

Restrictions.or(Restrictions.in("username",list1),Restrictions.idEq(1));

添加更多的查询条件

criteria.add(Restrictions.or(Restrictions.in("username",list1),Restrictions.or(Restrictions.idEq(3),Restrictions.idEq(4))));
Restrictions.or(Restrictions.like(),Restrictions.or(Restrictions.like,........))

添加多个条件：

Criteria criteria = this.createCriteria();
Disjunction dis = Restrictions.disjunction();
for (int i = 0; i < 5; i++) {
dis.add(Restrictions.eq("name", ""+i));
}
criteria .add(dis);

1、QBC (Query By Criteria) 主要有Criteria,Criterion,Oder,Restrictions类组成
session = this.getSession();
Criteria cri = DetachedCriteria.forClass(VoteOption.class);
Criterion cron = Restrictions.like("customer",name);
cri.add(cron);
list = cri.list();
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比较运算符
HQL运算符 QBC运算符含义
= Restrictions.eq() 等于
<> Restrictions.not(Exprission.eq()) 不等于
> Restrictions.gt() 大于
>= Restrictions.ge() 大于等于
< Restrictions.lt() 小于
<= Restrictions.le() 小于等于
is null Restrictions.isnull() 等于空值
is not null Restrictions.isNotNull() 非空值
like Restrictions.like() 字符串模式匹配
and Restrictions.and() 逻辑与
and Restrictions.conjunction() 逻辑与
or Restrictions.or() 逻辑或
or Restrictions.disjunction() 逻辑或
not Restrictions.not() 逻辑非
in(列表) Restrictions.in() 等于列表中的某一个值
ont in(列表) Restrictions.not(Restrictions.in())不等于列表中任意一个值
between x and y Restrictions.between() 闭区间xy中的任意值
not between x and y Restrictions.not(Restrictions..between()) 小于值X或者大于值y

2、 HQL
String hql = "select s.name ,avg(s.age) from Student s group by s.name";
Query query = session.createQuery(hql);
list = query.list();
....

3、本地SQL查询
session = sessionFactory.openSession();
tran = session.beginTransaction();
SQLQuery sq = session.createSQLQuery(sql);
sq.addEntity(Student.class);
list = sq.list();
tran.commit();

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