使用spring管理hibernate的事务

beans.xml中：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd ">
<context:annotation-config />
<context:component-scan base-package="com.luo" />
<bean id="logInterceptor" class="com.luo.log.LogInterceptor" />

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/springDemo" />
<property name="username" value="root" />
<property name="password" value="root" />
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="annotatedClasses">
<list>
<value>com.luo.bean.User</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect</prop>
<prop key="show_sql">true</prop>
<prop key="format_sql">true</prop>
</props>
</property>
</bean>

<bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<tx:annotation-driven transaction-manager="txManager" />

<aop:config>
<aop:pointcut expression="execution(public void com.luo.dao.daoImpl.UserDaoImpl.save(com.luo.bean.User))" id="pc"/>
<aop:aspect id="asp" ref="logInterceptor">
<aop:before pointcut-ref="pc" method="log" />
</aop:aspect>
</aop:config>
<!--  <aop:aspectj-autoproxy></aop:aspectj-autoproxy> -->
</beans>

在UserService中调用UserDao的与数据库打交道的save方法：

@Transactional
public void save(User user) {
userDao.save(user);
}
注意：这里的UserService倘若要使用@Component(value="us")标注的形式的话：
如果没有实现接口的类也想要实现代理，会使用直接操作二进制码的方式，来产生代理。必须引入cglib的jar包！

此时有了spring进行事务的管理后，就无需进行session.beginTransaction()以及session.getTransaction().commit().

倘如出现HibernateException时，spring会自动进行回滚操作而无须自己去实现。