HibernateUtil

下面是HibernateUtil代码：


package com.lml.util;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;

public class HibernateUtil {

    private static String configFile = "/hibernate.cfg.xml";
    private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();
    private static Configuration configuration = new Configuration();
    private static org.hibernate.SessionFactory sessionFactory;

    static {
        try {
            configuration.configure(configFile);
           
            ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()
            .applySettings( configuration.getProperties() )
            .build();
            sessionFactory= configuration.buildSessionFactory(serviceRegistry);
           
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private HibernateUtil() {
    }

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

        if (session == null || !session.isOpen()) {
            if (sessionFactory == null) {
                rebuildSessionFactory();
            }
            session = (sessionFactory != null) ? sessionFactory.openSession() : null;
            threadLocal.set(session);
        }

        return session;
    }

    public static void rebuildSessionFactory() {
        try {
            configuration.configure(configFile);
            ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()
            .applySettings( configuration.getProperties() )
            .build();
            sessionFactory= configuration.buildSessionFactory(serviceRegistry);
           
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

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

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

    public static org.hibernate.SessionFactory getSessionFactory() {
        return sessionFactory;
    }

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

    public static Configuration getConfiguration() {
        return configuration;
    }
   
    public static void shutdown(){
    getSessionFactory().close();
    }

}