spring 事务

1.service层事务注解

@Transactional(isolation = Isolation.REPEATABLE_READ,propagation = Propagation.REQUIRED)

2.springconfig  配置事务管理器和启动事务注解

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

    <!--启用事务注解-->
    <tx:annotation-driven transaction-manager="txManager"></tx:annotation-driven>