hibernatesessionfactory

最新推荐文章于 2020-07-02 10:40:07 发布

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最新推荐文章于 2020-07-02 10:40:07 发布

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分类专栏： java

本文链接：https://blog.youkuaiyun.com/oracle8090/article/details/52474647

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本文介绍了一个具体的Hibernate会话工厂实现方法，通过线程本地变量维护当前会话，并提供了获取当前会话、重建会话工厂及关闭当前会话的功能。

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package com.pb.hibernate.util;

import java.sql.SQLException;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class HibernateSessionFactory {


   private static String CONFIG_FILE_LOCATION = "/com/hibernate/hibernate.cfg.xml";
   private static final ThreadLocal threadLocal = new ThreadLocal();
    private static Configuration configuration = new Configuration();
    private static SessionFactory sessionFactory;
    private static String configFile = CONFIG_FILE_LOCATION;

    private HibernateSessionFactory() {
    }


    public static Session getCurrentSession() throws HibernateException {
        Session session = (Session) threadLocal.get();

        try {
            if (session == null || !session.isOpen()|| session.connection().isClosed()) {
                if (sessionFactory == null) {
                    rebuildSessionFactory();
               }
               session = (sessionFactory != null) ? sessionFactory.openSession()
                        : null;
                threadLocal.set(session);
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return session;
    }


    public static void rebuildSessionFactory() {
        try {
            configuration.configure(configFile);
            sessionFactory = configuration.buildSessionFactory();
        } catch (Exception e) {
            System.err
                      .println("%%%% Error Creating SessionFactory %%%%");
            e.printStackTrace();
        }
    }


    public static void closeCurrentSession() throws HibernateException {
        Session session = (Session) threadLocal.get();
        threadLocal.set(null);

        if (session != null) {
            session.close();           }       }

    public static SessionFactory getSessionFactory() {
        return sessionFactory;
    }


    public static void setConfigFile(String configFile) {
        HibernateSessionFactory.configFile = configFile;
        sessionFactory = null;
    }


    public static Configuration getConfiguration() {
        return configuration;
    }

}