spring jpa 條件查詢統計

EntityManager entityManager;

CriteriaBuilder criteriaBuilder =entityManager.getCriteriaBuilder();

CriteriaQuery<Entity> critQuery = criteriaBuilder.createQuery(實體類.class);
Root<實體類> root = critQuery.from(實體類.class);
Predicate predicate = criteriaBuilder.equal(root.get(字段).as(Integer.class),"條件參數");
critQuery.where(predicate);
return entityManager.createQuery(critQuery).getResultList().size();