是否必须使用hibernate.cfg.xml文件进行配置

Question

我不想拥有hibernate.cfg.xml文件.相反,我想通过我的代码进行所有配置,如下所示.

private static final SessionFactory factory;
private static final Properties properties;

static
{
    properties = new Properties();
    properties.setProperty("hibernate.connection.driver_class", "com.mysql.jdbc.Driver");
    properties.setProperty("hibernate.connection.url", "jdbc:mysql://localhost:3306/books");
    properties.setProperty("hibernate.connection.username", "jhtp7");
    properties.setProperty("hibernate.connection.password", "password");
    properties.setProperty("hibernate.show_sql", "com.mysql.jdbc.Driver");
    properties.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQLDialect");

    factory = new Configuration().setProperties(properties).configure().
                            buildSessionFactory();
}

我尝试过上述方法.但我面临的问题是,hibernate抛出一个异常说" ./hibernate.cfg.xml file missing".

保留hibernate.cfg.xml文件真的是强制性的吗？

提前致谢

Answer 1

我相信这是因为你configure()对这个Configuration对象的召唤.尝试删除它,休眠不会查找不存在的文件.基本上你是通过你的properties对象设置所有必需的属性,所以没有必要告诉Hibernate寻找一个hibernate.cfg.xml文件,这正是该configure()方法的作用.

Answer 2

不,我不认为配置xml是强制性的.为了解决您的问题,我认为您需要使用org.hibernate.cfg.Configuration类.看看这个链接:http://docs.jboss.org/hibernate/core/3.3/reference/en/html/session-configuration.html

基本上,你需要像这样的东西

Configuration cfg = new Configuration()
.setProperty("hibernate.dialect", "com.mysql.jdbc.Driver")
.setProperty("hibernate.connection.datasource", "jdbc:mysql://localhost:3306/books")
.setProperty("hibernate.order_updates", "true");

然后创建你的sessionFactory,你只需说,cfg.buildSessionFactory();

Answer 3

不,使用hibernate.cfg.xml并不是必须的.只是不要使用.configure().如果我们使用Hibernate将寻找hibernate.cfg.xml .configure().

public class HibernateUtil {
    private static SessionFactory sessionFactory ;
    static {
        Configuration configuration = new Configuration();

        configuration.addAnnotatedClass (org.gradle.Person.class);
        configuration.setProperty("hibernate.connection.driver_class","com.mysql.jdbc.Driver");
        configuration.setProperty("hibernate.connection.url", "jdbc:mysql://localhost:3306/hibernate");                                
        configuration.setProperty("hibernate.connection.username", "root");     
        configuration.setProperty("hibernate.connection.password", "root");
        configuration.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQLDialect");
        configuration.setProperty("hibernate.hbm2ddl.auto", "update");
        configuration.setProperty("hibernate.show_sql", "true");
        configuration.setProperty(" hibernate.connection.pool_size", "10");

        StandardServiceRegistryBuilder builder = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties());
        sessionFactory = configuration.buildSessionFactory(builder.build());
    }
    public static SessionFactory getSessionFactory() {
        return sessionFactory;
    }
}