Does OpenJPA have any support for batch insert?

问题

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.

回答1:

Short answer, yes.

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();

来源：https://stackoverflow.com/questions/10721038/does-openjpa-have-any-support-for-batch-insert