spring 事务的两种处理方式

1.XML配置方式：

<?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.xsd                           http://www.springframework.org/schema/aop                            http://www.springframework.org/schema/aop/spring-aop.xsd                           http://www.springframework.org/schema/context                            http://www.springframework.org/schema/context/spring-context.xsd                           http://www.springframework.org/schema/tx                            http://www.springframework.org/schema/tx/spring-tx.xsd">    <!-- 1 datasource -->    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/ee19_spring_day03"></property>        <property name="user" value="root"></property>        <property name="password" value="1234"></property>    </bean>    <!-- 2 dao  -->    <bean id="accountDao" class="com.itheima.dao.impl.AccountDaoImpl">        <property name="dataSource" ref="dataSource"></property>    </bean>    <!-- 3 service -->    <bean id="accountService" class="com.itheima.service.impl.AccountServiceImpl">        <property name="accountDao" ref="accountDao"></property>    </bean>    <!-- 4 事务管理 -->    <!-- 4.1 事务管理器 -->    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">        <property name="dataSource" ref="dataSource"></property>    </bean>    <!-- 4.2 事务详情（事务通知）  ， 在aop筛选基础上，对ABC三个确定使用什么样的事务。例如：AC读写、B只读 等        <tx:attributes> 用于配置事务详情（属性属性）            <tx:method name=""/> 详情具体配置                propagation 传播行为 ， REQUIRED：必须；REQUIRES_NEW:必须是新的                isolation 隔离级别    -->    <tx:advice id="txAdvice" transaction-manager="txManager">        <tx:attributes>            <tx:method name="transfer" propagation="REQUIRED" isolation="DEFAULT"/>        </tx:attributes>    </tx:advice>    <!-- 4.3 AOP编程，目标类有ABCD（4个连接点），切入点表达式 确定增强的连接器，从而获得切入点：ABC -->    <aop:config>        <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.itheima.service..*.*(..))"/>    </aop:config></beans>

2.基于注解的方式：

<?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.xsd                           http://www.springframework.org/schema/aop                            http://www.springframework.org/schema/aop/spring-aop.xsd                           http://www.springframework.org/schema/context                            http://www.springframework.org/schema/context/spring-context.xsd                           http://www.springframework.org/schema/tx                            http://www.springframework.org/schema/tx/spring-tx.xsd"><!-- 1 datasource -->    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/spring_test"></property>        <property name="user" value="root"></property>        <property name="password" value="root"></property>    </bean>    <!-- 2 dao  -->    <bean id="accountDao" class="dao.impl.AccountDaoImpl">        <property name="dataSource" ref="dataSource"></property>    </bean>    <!-- 3 service -->    <bean id="accountService" class="service.impl.AccountServiceImpl">        <property name="accountDao" ref="accountDao"></property>    </bean>    <!-- 4 事务管理 -->    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">        <property name="dataSource" ref="dataSource"></property>    </bean>    <tx:annotation-driven transaction-manager="txManager"/></beans>

在需要开启事务的方法上加上@Transactional