使用编程配置休眠，启动Hibernate .hbm2ddl.auto

I am configuration my hibernate sessionfactory programmatically:

我正在以编程方式配置我的hibernate sessionfactory:

http://docs.jboss.org/hibernate/orm/3.3/reference/en/html/session-configuration.html#configuration-programmatic

http://docs.jboss.org/hibernate/orm/3.3/reference/en/html/session-configuration.html configuration-programmatic

private static SessionFactory buildSessionFactory() {

        // Create the SessionFactory from hibernate.cfg.xml
        Configuration configuration = new Configuration();
        configuration.configure();

        configuration.setProperty("hibernate.connection.url", myUrl);
        configuration.setProperty("hibernate.connection.username", myUser);
        configuration.setProperty("hibernate.connection.password", myPass);

        serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry(); 

        return configuration.buildSessionFactory(serviceRegistry);
}

But problem, is that these properties are loaded only, when using hibernate operation from dao.

但是问题是，当从dao使用hibernate操作时，这些属性只被加载。

protected void startOperation() {
    session = HibernateUtil.getSessionFactory().openSession();
    tx = session.beginTransaction();
}

Therefore, when my application boots up, then hibernate.hbm2ddl.auto doesn't seem to work. Can I somehow force hibernate.hbm2ddl.auto to start in my program or any other solution?

因此，当我的应用程序启动时，然后hibernate.hbm2ddl。汽车似乎不能工作。我可以强制hibernate.hbm2ddl吗?自动启动我的程序或其他解决方案?

Suggetions or other options, thoughts?

建议还是其他选择，想法?

2 个解决方案

#1

You need to set hibernate.hbm2ddl.auto or used

您需要设置hibernate.hbm2ddl。auto or used

configuration.setProperty("hibernate.hbm2ddl.auto", "create-drop");

Using configuration file like hibernate.properties or hibernate.cfg.xml is more preferred way to set your setting.

使用配置文件如hibernate。属性或hibernate.cfg。xml是设置设置设置的首选方式。

#2

Yes. new Configuration() should load all the properties from hibernate.cfg.xml.

是的。新配置()应该加载hibernate.cfg.xml的所有属性。

It seems that your SessionFactory is configured to be lazy initialized which only be built when HibernateUtil.getSessionFactory() is called.

似乎您的SessionFactory被配置为惰性初始化，只在调用hibernate . getsessionfactory()时构建。

If it is a console program , simple call SessionFactory.buildSessionFactory() in the main method

如果是控制台程序，可以在主方法中简单地调用SessionFactory.buildSessionFactory()

If it is a web application , you can use ServletContextListener.contextInitialized(ServletContextEvent sce) or Spring to force the SessionFactory.buildSessionFactory() to be executed during the server starts.

如果是web应用程序，则可以使用ServletContextListener。contextInitialized(servlettevent sce)或Spring在服务器启动期间强制执行SessionFactory.buildSessionFactory()。

#1