HibernateUtil

package com.ssh.util;

import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.tool.hbm2ddl.SchemaExport;

public class HibernateUtil {
    private static final SessionFactory sessionFactory = buildSessionFactory();

    private static SessionFactory buildSessionFactory() {
        try {
            
            //Hibernate 4.x 时代
            Configuration cfg = new Configuration();
            cfg.configure();
            
//            SchemaExport se = new SchemaExport(cfg);
//            se.create(true, true);

            ServiceRegistry sr = 
                new StandardServiceRegistryBuilder()
                    .applySettings(cfg.getProperties())
                    .build();

            SessionFactory factory = cfg.buildSessionFactory(sr);
            
            return factory;
            // Create the SessionFactory from hibernate.cfg.xml
           // return new Configuration().configure().buildSessionFactory();
        }
        catch (Throwable ex) {
            // Make sure you log the exception, as it might be swallowed
            System.err.println("Initial SessionFactory creation failed." + ex);
            throw new ExceptionInInitializerError(ex);
        }
    }

    public static SessionFactory getSessionFactory() {
        return sessionFactory;
    }
}