Spring Data JPA批量插入

@PersistenceContext
private EntityManager entityManager;

@Transactional
public void batchInsert(List<Entity> entities) {
    for (int i = 0; i < entities.size(); i++) {
        entityManager.createNativeQuery("INSERT INTO table_name (column1, column2) VALUES (:value1, :value2)")
                .setParameter("value1", entities.get(i).getValue1())
                .setParameter("value2", entities.get(i).getValue2())
                .executeUpdate();
        if (i % batchSize == 0) {
            entityManager.flush();
            entityManager.clear();
        }
    }
}

@Transactional
public void batchInsert(List<Entity> entities) {
    repository.saveAll(entities);
}