关于hibernate的新增

[zwl_yuyang]

package event;

import java.util.Date;

import org.hibernate.Session;

public class EventManager {

public static void main(String[] args) {
EventManager mgr = new EventManager();
mgr.createAndStoreEvent("345 ", new Date());
HibernateUtil.getSessionFactory().close();
}

private void createAndStoreEvent(String title, Date theDate) {

Session session = HibernateUtil.getSessionFactory().openSession();
session.beginTransaction();

Events theEvent = new Events();
theEvent.setTitle(title);
theEvent.setDate(theDate);

session.save(theEvent);
session.getTransaction().commit();
}

}

配置文件
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
<class name="event.Events" table="EVENTS">
<id name="id" column="EVENT_ID">
<generator class="sequence">
<param name="sequence">seq</param>
</generator>
</id>
<property name="date" type="timestamp" column="EVENT_DATE"/>
<property name="title" type="java.lang.String" column="EVENT_TITLE"/>

</class>
</hibernate-mapping>

我要的是新增，但是每次执行main方法都会把之前的数据覆盖了，只保留最后一次的，请问哪边除了问题。

[_jerrytiger]

看 ， hibernate.cfg.xml 文件

里面有个属性叫 hbm2ddl.auto 把它的值设置成为 update ， 你可能设置成为 create-drop 了