HQL的增删改查操作
实体更新
Transaction trans=session.beginTransaction();
String hql=”update User user set user.age=20 where user.age=18”;
Query queryupdate=session.createQuery(hql);
int ret=queryupdate.executeUpdate();
trans.commit();
实体删除
Transaction trans=session.beginTransaction();
String hql=”delete from User user where user.age=18”;
Query queryupdate=session.createQuery(hql);
int ret=queryupdate.executeUpdate();
trans.commit();
属性查询
List list=session.createQuery(“select user.name from User user ”).list();
for(int i=0）{
System.out.println(list.get(i));
}
一次检索多个属性，如下面程序：
List list=session.createQuery(“select user.name,user.age from User user ”).list();
for(int i=0;i<list.length();i++){
Object[] obj=(Object[])list.get(i);
System.out.println(obj[0]);
System.out.println(obj[1]);
}
