JavaConfig 中的 Hibernate 包扫描

Question

我正在尝试在没有 xml 的情况下配置 Spring 和 Hibernate。这是我的 SessionFactory bean。当我将带注释的类添加到配置中时-它可以正常工作。我想自动执行此操作，但由于某种原因将包添加到配置中没有帮助，我收到“标识符未映射”错误

    @Bean
public SessionFactory sessionFactory(){
    Properties hibernateProperties = new Properties();
    hibernateProperties.put("hibernate.connection.driver_class",ds_driver);
    hibernateProperties.put("hibernate.connection.url",ds_url);
    hibernateProperties.put("hibernate.connection.username",ds_username);
    hibernateProperties.put("hibernate.connection.password",ds_password);
    hibernateProperties.put("hibernate.show_sql", false);
    hibernateProperties.put("connection.pool_size", 1);
    hibernateProperties.put("current_session_context_class", "thread");
    hibernateProperties.put("hibernate.hbm2ddl.auto", "update");

    org.hibernate.cfg.Configuration configuration = new org.hibernate.cfg.Configuration();
    configuration.addPackage("app.entity"); // **doesnt work**
    configuration.addAnnotatedClass(Identificator.class); // **works fine**
    configuration.addProperties(hibernateProperties);

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

    return sessionFactory;
}

Answer 1

#addPackage() 方法读取包级元数据，而不是包中的类。不幸的是，Configuration 类没有提供你想要的方法，你必须将所有类传递给#addAnnotatedClass()。

一种可能（但不确定是否值得推荐）的解决方案是使用另一种解决方案来查找所需的类描述符，从中构建一个列表，然后将它们循环传递给#addAnnotatedClass()。我很确定，Spring 对此有解决方案。

Answer 2

   public SessionFactory getSessionFactory() {
    if (sessionFactory == null) {
        Configuration configuration = new Configuration()
                .configure(getMappedValue("Universal", "qb_hibernate"))
                .setProperty("hibernate.connection.autocommit", "true")
                .setProperty("connection.pool_size", "20000")
                .setProperty("hibernate.dialect", getMappedValue("Universal", "dialect"))
                .setProperty("hibernate.connection.driver_class", getMappedValue("Universal", "driver_class"))
                .setProperty("hibernate.connection.url", getMappedValue("Universal", "url"))
                .setProperty("hibernate.connection.username", getMappedValue("Universal", "userName"))
                .setProperty("hibernate.connection.password", getMappedValue("Universal", "password"))
                .setProperty("hibernate.show_sql", "false")
                .setProperty("hibernate.current_session_context_class", "thread")
                .setProperty("hibernate.query.factory_class", "org.hibernate.hql.internal.classic.ClassicQueryTranslatorFactory");
        ServiceRegistry serviceRegistry
                = new StandardServiceRegistryBuilder()
                .applySettings(configuration.getProperties()).build();
        LocalSessionFactoryBuilder builder
                = new LocalSessionFactoryBuilder(dataSource());
        builder.scanPackages("zw.co.techno.xxxxx.model").buildSettings(serviceRegistry);
        // builds a session factory from the service registry
        // sessionFactory = configuration.buildSessionFactory(serviceRegistry);
        sessionFactory = builder.buildSessionFactory();
    }
    return sessionFactory;
}