OpenJPA是否支持批量插入?

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问题描述

OpenJPA是否对批处理插入提供任何支持，类似于休眠?我尚未在文档中找到它，但我希望我能错过它.我知道 JPA通常不支持.

Does OpenJPA have any support for batch insert similar to Hibernate? I haven't found it in the docs, but I'm hoping I missed it. I know JPA doesn't support it in general.

推荐答案

答案很简单，是的.

更长的答案，请转到Hibernate文档的链接，然后将会话替换为JPA EntityManager.

Longer answer, take the link to Hibernate documentation and replace the Session with a JPA EntityManager.

EntityManager em = emf.createEntityManager();
Transaction tx = em.getTransaction();

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

tx.commit();
em.close();

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