将条件的行为复制到criteriaBuilder

public List<User> getUsersByCriteria(String name, int age) {
    CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
    CriteriaQuery<User> query = criteriaBuilder.createQuery(User.class);
    Root<User> root = query.from(User.class);

    List<Predicate> predicates = new ArrayList<>();

    if (name != null) {
        predicates.add(criteriaBuilder.equal(root.get("name"), name));
    }

    if (age > 0) {
        predicates.add(criteriaBuilder.greaterThan(root.get("age"), age));
    }

    query.where(predicates.toArray(new Predicate[0]));

    return entityManager.createQuery(query).getResultList();
}