hbnutil.java

我们采用了JSP技术为主要手段,本系统采用了多级角色管理：包括系统管理员、系主任

package com.middle.graduate.util;

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

public class HbnUtil {
	private static ThreadLocal<Session> local;
	private static SessionFactory sf;
	static {
		local = new ThreadLocal<Session>();
		try {
			sf = new Configuration().configure().buildSessionFactory();
		} catch (HibernateException e) {
			e.printStackTrace();
		}
	}
    public static Session getSession(){
    	Session s = (Session)local.get();
    	if(s==null || !s.isOpen()){
    		s = sf.openSession();
//    		sf.getCurrentSession();
    		local.set(s);
    	}
    	return s;
    }
    public static void closeSession(){
    	Session s = (Session)local.get();
    	if(s!=null && s.isOpen()){
    		s.close();
    		local.set(null);
    	}
    }
  	public static void release() {
		if (sf != null && !sf.isClosed()) {
			sf.close();
		}
	}
}