HibernateUtil.java，hibernateutil

HibernateUtil.java，hibernateutil

package com.hkwy.util;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;

public class HibernateUtil{
    public static final SessionFactory sessionFactory;
    static{
        Configuration config = new AnnotationConfiguration().configure();  //讀取並解析配置文件
        sessionFactory = config.buildSessionFactory();   //創建SessionFactory 
    }
    /**
     * @return
     * 打開Session   獲取連接
     */
    public static Session getSession(){
        return sessionFactory.openSession();   //打開session
    }
    /**
     * @param session
     * 關閉session   關閉連接
     */
    public static void closeSession(Session session){
        if(session !=null){    //關閉session
            session.close();
        }
    }
    public static void main(String[] args) {
        System.out.println(HibernateUtil.getSession());
        //若連接成功   打印出：SessionImpl(PersistenceContext[entityKeys=[],collectionKeys=[]];ActionQueue[insertions=[] updates=[] deletions=[] collectionCreations=[] collectionRemovals=[] collectionUpdates=[]])
    }
}