JPA批量插入

int entityCount = 50;
int batchSize = 25;

EntityManager entityManager = entityManagerFactory()
    .createEntityManager();

EntityTransaction entityTransaction = entityManager
    .getTransaction();

try {
    entityTransaction.begin();

    for (int i = 0; i < entityCount; i++) {
        if (i > 0 && i % batchSize == 0) {
            entityTransaction.commit();
            entityTransaction.begin();

            entityManager.clear();
        }

        Post post = new Post(
            String.format("Post %d", i + 1)
        );

        entityManager.persist(post);
    }

    entityTransaction.commit();
} catch (RuntimeException e) {
    if (entityTransaction.isActive()) {
        entityTransaction.rollback();
    }
    throw e;
} finally {
    entityManager.close();
}

此外，请确保使用以下配置属性启用JDBC批处理：

<property
    name="hibernate.jdbc.batch_size"
    value="25"
/>

<property
    name="hibernate.order_inserts"  
    value="true"
/>

<property
    name="hibernate.order_updates"  
    value="true"
/>