9.4.1 一级Cache

Session session = HibernateUtil.currentSession();
Transaction tx = session.beginTransaction() ;
for(int i=0; i<100000 ;i++) {
Student stu = new Student();
….
session.save(stu);
}
tx.commit();
session.close();

 hibernate.jdbc.batch_size 20

<property name=”hibernate.jdbc.batch_size”> 20 </property>

 Session session = HibernateUtil.currentSession();
Transaction tx = session.beginTransaction() ;
for(int i=0; i<100000 ;i++) {
Student stu = new Student();
….
session.save(stu);
if(i%20==0) { //每保存完20个Student对象后，进行以下操作
session.flush(); //提交更新
session.clear(); //清除Cache，释放内存
}
}
tx.commit();
session.close();