Spring3.2.9 + JdbcTemplate 事务

<!-- 事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

    <!-- 开启事务注解驱动 -->
    <tx:annotation-driven />

@Transactional
    public void changeAge(String fromUser, String toUser, int age) {
        testDao.addAge(fromUser, age);

        int a = 1 / 0;

        testDao.addAge(toUser, 0 - age);

    }