hbnutil.java

hibernate映射1对多的课堂代码

package com.sd0709.enrollment.util;

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

public class HbnUtil {
	private static SessionFactory sf;
	private Session s;
	private Transaction tran;
	static {
		try {
			sf=new Configuration().configure().buildSessionFactory();
		} catch (HibernateException e) {
			e.printStackTrace();
		}
	}
	public static Session getSession(){
		Session s=null;
		try {
			if(sf!=null&&!sf.isClosed()){
				s=sf.openSession();
			}
		} catch (HibernateException e) {
			e.printStackTrace();
		}
		return s;
	}
	public static void releaseSeesion(Session s){
		if(s!=null&&s.isOpen()) s.close();
	}
	public static void clearSessionFactory(){
		if(sf!=null&&!sf.isClosed()) sf.close();
	}
}