Criteria API 已弃用,如何改为转换 ti CriteriaQuery?

Criteria API deprecated, how to convert ti CriteriaQuery instead?

我正在将一个旧的现有项目迁移到 Springboot。 我有以下方法:

public List<T> findAll(Class<?> clazz) {
    Criteria search = entityManager.unwrap(Session.class).createCriteria(clazz);
    List<T> entities = search.list();
    return entities;
}

还有一个:

public County findByName(String name) {
    Criteria search = entityManager.unwrap(Session.class).createCriteria(County.class).add(Restrictions.eq("county", name));

    County county = (County) search.uniqueResult();

    return county;
}

这有效,但是当我 运行 项目时,我收到以下警告:Hibernate's legacy org.hibernate.Criteria API is deprecated; use the JPA javax.persistence.criteria.CriteriaQuery instead

如何将其转换为使用 javax.persistence.criteria.CriteriaQuery 并仍然能够收到相同的结果?我从未使用过这两种 API。

感谢帮助!

查找全部:

CriteriaBuilder cb = entityManager.getCriteriaBuilder();
CriteriaQuery<Country> cq = cb.createQuery(Country.class);

Root<Country> rootCountry= cq.from(Country.class);
cq.select(rootCountry);

List<Country> result = entityManager.createQuery(cq).getResultList();

按名称查找:

CriteriaBuilder cb = entityManager.getCriteriaBuilder();
CriteriaQuery<Country> cq = cb.createQuery(Country.class);

Root<Country> rootCountry= cq.from(Country.class);
cq.select(rootCountry);
cq.where(cb.equal(rootCountry.get(Country_.name),NAME))
// if you don't use metamodel (although it is recommended) -> cq.where(cb.equal(rootCountry.get("name"),NAME))

Country result = entityManager.createQuery(cq).getSingleResult();

你能在这个 link https://docs.jboss.org/hibernate/entitymanager/3.5/reference/en/html/querycriteria.html

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