spring of using transactions (b)

Connect one: https: //www.cnblogs.com/xiximayou/p/12167894.html

To address these issues using the transaction.

Configure the transaction manager in the applicationContext.xml:

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

Enable transaction Note:

    <! - Enable transaction comment -> 
    < tx: Annotation-Driven Transaction-Manager = "transactionManager" />

Then add the transaction comment on the purchase method:

    @Transactional
    @Override
    public void purchase(String username, String isbn)

At this point, we run testBookShopService method, found that when the balance is insufficient, inventory and will not be reduced.