如何在JPAQuery中对时间戳使用orderby？

import javax.persistence.EntityManager;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Root;
import java.util.List;

public class JPAQueryExample {

    private EntityManager entityManager;

    public List<Entity> getEntitiesOrderByTimestamp() {
        CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
        CriteriaQuery<Entity> criteriaQuery = criteriaBuilder.createQuery(Entity.class);
        Root<Entity> root = criteriaQuery.from(Entity.class);
        criteriaQuery.orderBy(criteriaBuilder.asc(root.get("timestamp")));
        return entityManager.createQuery(criteriaQuery).getResultList();
    }
}