关于Hibernate 急等

Question

session 是hibernate自己的一个对象，一个数据库操作建立一个session，
Session session = new Configuration().configure().buildSessionFactory().openSession();

Answer 1

    private static SessionFactory factory = null;    static
    {
        try
        {
            Configuration config = new Configuration();
            factory = config.configure().buildSessionFactory();
        } catch (Throwable e)
        {
            System.err.println("Initial SessionFactory creation failed." + e);
            throw new ExceptionInInitializerError(e);
        }
    }    public void save(Student student)
    {
        Session session = null;
        Transaction trans = null;        try
        {
            session = factory.openSession();
            trans = session.beginTransaction();
            session.save(student);            
            trans.commit();
        } catch (RuntimeException e)
        {
            trans.rollback();
            e.printStackTrace();
            throw e;
        } finally
        {
            session.close();
        }
    }

Answer 2

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