JpaBatchInsert.java

EntityTransaction tx = entityManager.getTransaction();
Iterator<TripEntityJpa> iterator = trips.iterator();
tx.begin();
int cont = 0;
int idSeq = 1;
while (iterator.hasNext()) {
    TripEntityJpa trip = iterator.next();
    trip.setId(idSeq++);
    entityManager.persist(trip);
    cont++;
    if (cont % batchSize == 0) {
        entityManager.flush();
        entityManager.clear();
        tx.commit();
        tx.begin();
    }
}
tx.commit();