hibernateUtil中hibernate3和hibernate4的区别

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基于Hibernate3 做应用系统，换成hibernate4会出现sessionFactory 的方法过时。

Hibernate 3的 HibernateUtil

package com.yihaomen.hibernate.util;import org.hibernate.SessionFactory;import org.hibernate.cfg.Configuration;public class HibernateUtil {    private static final SessionFactory sessionFactory = buildSessionFactory();    private static SessionFactory buildSessionFactory() {        try {            // 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;    }        public static void shutdown() {        getSessionFactory().close();    }}

然而 return new Configuration().configure().buildSessionFactory(); 这条语句过期。下面是基于hibernate4写的hibernateUtil

package com.yihaomen.hibernate.util;import org.hibernate.SessionFactory;import org.hibernate.cfg.Configuration;import org.hibernate.service.ServiceRegistry;import org.hibernate.service.ServiceRegistryBuilder;public class HibernateUtil{    private static final SessionFactory sessionFactory;    static    {        try        {            Configuration cfg = new Configuration().configure();            ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(cfg.getProperties()).build();            sessionFactory = cfg.buildSessionFactory(serviceRegistry);        }        catch (Throwable e)        {            throw new ExceptionInInitializerError(e);        }    }    private HibernateUtil()    {    }    public static SessionFactory getSessionFactory()    {        return sessionFactory;    }}

但是，同样发现出了问题，org.hibernate.service.ServiceRegistryBuilder 已经 deprecated 了，所以这还不是最终的方法，于是在hibernate 官方去搜索，发现了如下答案:

Class ServiceRegistryBuilderjava.lang.Objectorg.hibernate.boot.registry.StandardServiceRegistryBuilderorg.hibernate.service.ServiceRegistryBuilderDeprecated. Use StandardServiceRegistryBuilder instead@Deprecatedpublic class ServiceRegistryBuilderextends StandardServiceRegistryBuilder

看到标粗体的部分了吗，这就是重点, 需要用 StandardServiceRegistryBuilder 代替 ServiceRegistryBuilder 这个类。

hibernate4 HibernateUtil

package com.yihaomen.hibernate.util;import org.hibernate.SessionFactory;import org.hibernate.boot.registry.StandardServiceRegistryBuilder;import org.hibernate.cfg.Configuration;import org.hibernate.service.ServiceRegistry;public class HibernateUtil{    private static final SessionFactory sessionFactory;    static    {        try        {            Configuration cfg = new Configuration().configure();            ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(cfg.getProperties()).build();            sessionFactory = cfg.buildSessionFactory(serviceRegistry);        }        catch (Throwable e)        {            throw new ExceptionInInitializerError(e);        }    }    private HibernateUtil()    {    }    public static SessionFactory getSessionFactory()    {        return sessionFactory;    }}

以上就是HIbernate4 的 Util 工具的一个基本演变过程.Use StandardServiceRegistryBuilder instead

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