封装hibernate中session（静态单例模式）

package com.itnba.maya.model;

import org.hibernate.*;
import org.hibernate.cfg.*;

public class HibernateUtil {
    private static final SessionFactory factory =  BuilderFactory();
    private static final ThreadLocal<Session> thread=new ThreadLocal<Session>();
    
    private static SessionFactory BuilderFactory() {
        Configuration config=new Configuration().configure();
        return config.buildSessionFactory();
    }
    public static Session getSession(){
        Session session=thread.get();
        if(session==null){
            session=factory.openSession();
            thread.set(session);
        }
        return session;    
    }
    public static void closeSession(){
        Session session=thread.get();
        if(session!=null){
            session.close();
            thread.set(null);
        }
    }

}

package com.itnba.maya.test;

import java.util.List;

import org.hibernate.*;

import com.itnba.maya.model.Fruit;
import com.itnba.maya.model.HibernateUtil;

public class BB {

    public static void main(String[] args) {
        Fruit data = new Fruit();
        data.setIds("s003");
        data.setName("芒果");
        data.setSource("不知道");
        data.setPrice(12.0);
        data.setNumbers(100);
        data.setImage("没有");
        
        Session session=null;
        try{
            session=HibernateUtil.getSession();
            session.beginTransaction();
            session.save(data);
            session.getTransaction().commit();
        }catch (Exception e) {
            session.getTransaction().rollback();
        }finally {
            HibernateUtil.closeSession();
        }    
    }

}