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java – 如何使用hibernate将多行插入数据库？

我正在循环列表并插入数据库,但它逐个更新记录.最后我只在数据库的最后一个记录中看到了这一点.

输入名称：Linux,windows,mac

Session session = (Session) HibernateUtil.getSessionFactory().openSession();
String[] items = pi.getNewLicenseName().split(",");
for (String item : items)
{
feature.setName(item);
session.save(feature);
}
 session.getTransaction().commit();
 HibernateUtil.shutdown();

hibernate.cfg.xml中：

<hibernate-configuration>

    <session-factory>


    <property name="connection.driver_class">com.microsoft.sqlserver.jdbc.SQLServerDriver</property>
    <property name="connection.url">jdbc:sqlserver://******</property>
    <property name="connection.username">*****</property>
    <property name="connection.password">*****</property>

    <property name="dialect">org.hibernate.dialect.SQLServerDialect</property>


        <property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>

        <property name="hibernate.current_session_context_class">thread</property>
<property name="hibernate.current_session_context_class">org.hibernate.context.internal.ThreadLocalSessionContext</property>


        <property name="show_sql">true</property>
<property name="hibernate.hbm2ddl.auto">update</property>

        <!-- Names the annotated entity class -->

         <mapping class="com.DAO.Feature"/>

    </session-factory>

这里三次得到循环并插入数据库.但以某种方式覆盖了值.因为我看到sql insert和update在控制台中运行.

Hibernate: insert into FEATURE (NAME) values (?)
Hibernate: update FEATURE set NAME=? where FEATURE_ID=?

请帮我把多行插入数据库.

关于 batch processing in the Hibernate docs

有一个非常好的章节.

设置属性

hibernate.jdbc.batch_size 20

然后使用此代码

Session session = sessionFactory.openSession();
Transaction tx = session.beginTransaction();

for ( int i=0; i<100000; i++ ) {
    Customer customer = new Customer(.....);
    session.save(customer);
    if ( i % 20 == 0 ) { //20, same as the JDBC batch size
        //flush a batch of inserts and release memory:
        session.flush();
        session.clear();
    }
}

tx.commit();
session.close();

请务必考虑对您的ID生成策略的影响,例如 discussed here .

更新2015-09-23

我终于找到了坐下来在 http://frightanic.com/software-development/jpa-batch-inserts/ 写一篇详细文章的时间.

翻译自：https://stackoverflow.com/questions/20458401/how-to-insert-multiple-rows-into-database-using-hibernate

原文 https://codeday.me/bug/20190112/513803.html

正文到此结束