hibernate查询小结

hibernate查询方式举例

1 单个对象

a) Query query=session.createQuery("from ConsortBean a where a.person.id=?");
    query.setString(0,pb.getId());//参数从零开始
    List list=query.list();

b) Query query=session.createQuery("from ConsortBean a where a.person.id=:id");
    query.setString("id",pb.getId());
   List list=query.list();

c) List list =session.find(
 "from ConsortBean a where a.person.id=?",
 pb.getId(),
 Hibernate.STRING);

2 分页

int pagecount = 10;//每页数量

..
q =
session.createQuery(
"from FootPayRequestBean as fprb where fprb.state=? order by fprb.contractID");
q.setString(0, type);

q.setFirstResult(page * pagecount);//page从0开始
q.setMaxResults(pagecount);
l = q.list();
　

3 求count()

((Integer) session.iterate("select count(*) from ConsortBean").next() ).intValue();

4 联合查询

Query query=session.createQuery("select a from ConsortBean a,PersonBean b where a.person.id=b.id and b.name like ?");//对象别名
query.setString(0,"%管%");
List list=query.list();