Question

此代码工作正常，返回单行：

public static Customer GetCustomerFromDB() {

    Configuration configuration = new Configuration();
    configuration.configure("hibernate.cfg.xml");
    configuration.addAnnotatedClass(com.english.Customer.class);
    configuration.configure();

    ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties()).build();
    SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);

    Session session = sessionFactory.openSession();
    session.beginTransaction();

    Customer customer = session.get(Customer.class, 1);

    session.getTransaction().commit();
    session.close();

    sessionFactory.close();
    return customer;
}

我需要来自表客户的DB中的所有行。表客户包含一个元素。小变化。删除session.get（）并添加以下行：

//same code as above
CriteriaQuery<Customer> criteriaQuery = session.getCriteriaBuilder().createQuery(Customer.class);
criteriaQuery.from(Customer.class);

List<Customer> contacts = session.createQuery(criteriaQuery).getResultList();
Customer customer = contacts.get(0);
//same code

错误： java.lang.NoClassDefFoundError：antlr / RecognitionException

POM：

//...
        <!-- https://mvnrepository.com/artifact/antlr/antlr -->
        <dependency>
            <groupId>antlr</groupId>
            <artifactId>antlr</artifactId>
            <version>3.0ea8</version>
        </dependency>
//...

Answer 1

您只需执行此操作即可获取所有行：

String hql = "FROM Customer";
Query query = session.createQuery(hql);
List results = query.list();

如何使用hibernate从DB获取所有行？

1 个答案: