jpa多对多关系标准

完成了，终于…

这是代码：

public List<Collaborator> getCollaborators(Long answerId) {        CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();        CriteriaQuery<Collaborator> criteriaQuery = criteriaBuilder     .createQuery(Collaborator.class);        Root<Answer> answerRoot = criteriaQuery.from(Answer.class);        criteriaQuery.where(criteriaBuilder.equal(answerRoot.get(Answer_.id),     answerId));        SetJoin<Answer, Collaborator> answers = answerRoot     .join(Answer_.collaborators);        CriteriaQuery<Collaborator> cq = criteriaQuery.select(answers);        TypedQuery<Collaborator> query = entityManager.createQuery(cq);        return query.getResultList();    }