Hibernate-使用事务

protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		User u1 = new User();
		u1.setName("测试11111");

		User u2 = new User();
		u2.setName("测试222222");

		new SaveService().add(u1, u2);

		System.out.println("ok");
	}

配置：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
	"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
	"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
	<session-factory>
		<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
		<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hibernatetransaction</property>
		<property name="hibernate.connection.username">root</property>
		<property name="hibernate.connection.password">root</property>
		<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>

		<property name="hibernate.show_sql">true</property>
		<property name="hibernate.format_sql">true</property>

		<property name="hibernate.hbm2ddl.auto">update</property>

		<!-- 将session绑定到当前的线程中，这样在同一个线程中就可以使用同一个session，进行事务操作，要是用全称 -->
		<property name="hibernate.current_session_context_class">org.hibernate.context.ThreadLocalSessionContext</property>

		<mapping resource="com/gordon/domain/User.hbm.xml"/>
	</session-factory>
</hibernate-configuration>

package com.gordon.service;

import org.hibernate.Session;
import org.hibernate.Transaction;

import com.gordon.dao.SaveDao;
import com.gordon.domain.User;
import com.gordon.utils.HibernateUtil;

public class SaveService {

	public void add(User u1, User u2) {

		SaveDao saveDao = new SaveDao();

		// 从当前线程中获取session
		Session session = HibernateUtil.getCurrentSession();
		//开启这个session的事务
		Transaction tr = session.beginTransaction();

		try {
			saveDao.add1(u1);

			int i =  100/0;

			saveDao.add2(u2);

			tr.commit();
		} catch (Exception e) {
			tr.rollback();
			e.printStackTrace();
		}

		// 不需要关闭session，会自动关闭

	}

}

package com.gordon.dao;

import org.hibernate.Session;

import com.gordon.domain.User;
import com.gordon.utils.HibernateUtil;

public class SaveDao {

	public void add1(User u) {
		Session session = HibernateUtil.getCurrentSession();
		session.save(u);
	}

	public void add2(User u) {
		Session session = HibernateUtil.getCurrentSession();
		session.save(u);
	}

}

package com.gordon.utils;

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

public class HibernateUtil {
	private static final Configuration CONFIGURATION;
	private static final SessionFactory SESSIONFACTORY;

	static {
		CONFIGURATION = new Configuration().configure();
		SESSIONFACTORY = CONFIGURATION.buildSessionFactory();
	};

	public static Session getSession() {
		return SESSIONFACTORY.openSession();
	}

	public static Session getCurrentSession() {
		return SESSIONFACTORY.getCurrentSession();
	}
}