Hibernate 5中不推荐使用createCriteria方法

Question

此调用已弃用:

session.createCriteria(Bus.class).list();

在源文件中,我可以看到:

/** @deprecated */
@Deprecated
Criteria createCriteria(Class var1);

/** @deprecated */
@Deprecated
Criteria createCriteria(Class var1, String var2);

/** @deprecated */
@Deprecated
Criteria createCriteria(String var1);

/** @deprecated */
@Deprecated
Criteria createCriteria(String var1, String var2);

但我无法理解我必须使用哪种方法代替createCriteria.

Answer 1

您可以在Hibernate 5.2 +中使用以下界面:

javax.persistence.criteria.CriteriaBuilder
javax.persistence.criteria.CriteriaQuery

// Create CriteriaBuilder
CriteriaBuilder builder = session.getCriteriaBuilder();

// Create CriteriaQuery
CriteriaQuery<YourClass> criteria = builder.createQuery(YourClass.class);

Answer 2

截至2018年3月增加答案.

依赖关系:

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.boot.MetadataSources;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.service.ServiceRegistry;

import javax.persistence.criteria.CriteriaQuery;
import java.util.List;



public static List<Contact> fecthAllContacts() {
        Session session = sessionFactory.openSession();

        // create Criteria
        CriteriaQuery<Contact> criteriaQuery = session.getCriteriaBuilder().createQuery(Contact.class);
        criteriaQuery.from(Contact.class);

        List<Contact> contacts = session.createQuery(criteriaQuery).getResultList();
        session.close();

        return contacts;
    }

而sessionFactory为:

public static SessionFactory buildSessionFactory() {
        final ServiceRegistry registry = new StandardServiceRegistryBuilder().configure().build();
        return new MetadataSources(registry).buildMetadata().buildSessionFactory();
    }

Answer 3

我有以下方法，出于安全原因更改了对象名称：

public List<MyObject> listAllForIds(List<Long> ids) {
    Criteria criteria = getSessionFactory().getCurrentSession().createCriteria(MyObject.class)
            .createAlias("joinObject", "joinObject")
            .add(Restrictions.not(Restrictions.like("name", "string1", MatchMode.END)))
            .add(Restrictions.not(Restrictions.like("name", "string2", MatchMode.END)))
            .add(Restrictions.in("joinObject.id", ids));

    return criteria.list();
}

更改为使用：

javax.persistence.criteria.CriteriaBuilder
javax.persistence.criteria.CriteriaQuery

该查询如下所示：

public List<MyObject> listAllForIds(List<Long> ids) {

    CriteriaBuilder builder = getSessionFactory().getCurrentSession().getCriteriaBuilder();
    CriteriaQuery<MyObject> criteria = builder.createQuery(MyObject.class);
    Root<MyObject> myObjectRoot = criteria.from(MyObject.class);
    Join<MyObject, JoinObject> joinObject = myObjectRoot.join("joinObject");

    Predicate likeRestriction = builder.and(
            builder.notLike( myObjectRoot.get("name"), "%string1"),
            builder.notLike( myObjectRoot.get("name"), "%string2")
    );

    criteria.select(myObjectRoot).where(joinObject.get("id").in(ids), likeRestriction);

    TypedQuery<MyObject> query = getSessionFactory().getCurrentSession().createQuery(criteria);

    return query.getResultList();
}

希望它对其他人有帮助，请随时提出任何建议以改进代码。