Spring声明式事务

<?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/context 
http://www.springframework.org/schema/context/spring-context.xsd 
http://www.springframework.org/schema/aop 
http://www.springframework.org/schema/aop/spring-aop.xsd 
http://www.springframework.org/schema/tx 
http://www.springframework.org/schema/tx/spring-tx.xsd"> 
    <context:property-placeholder location="classpath:db.properties"/>
          <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
                <property name="driverClassName" value="${jdbc.driver}"></property>
                <property name="url" value="${jdbc.url}"></property>
                <property name="password" value="${jdbc.password}"></property>
                <property name="username" value="${jdbc.username}"></property>
        </bean>
        <bean id="factory" class="org.mybatis.spring.SqlSessionFactoryBean">
                    <property name="dataSource" ref="dataSource"></property>
         </bean>
         <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
                     <property name="basePackage" value="com.mapper"></property>
                     <!-- 当使用自动注入的时候, -->
                     <property name="sqlSessionFactoryBeanName" value="factory"></property>
         </bean>

        <!-- 声明式事务 -->
        <bean id="txmanager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <property name="dataSource" ref="dataSource"></property>
        </bean>   
        <!-- 配置声明式事务 -->
        <tx:advice id="txadvice" transaction-manager="txmanager">
                <!-- 设置那些方法需要事务管理 
                方法以in开头的
                -->
                <tx:attributes>
                    <tx:method name="in*"/>
                </tx:attributes>
        </tx:advice>
        <aop:config>
            <aop:aspect>
                <aop:pointcut expression="execution(* DeclarativeTransaction.*.*())" id="mypoint"/>
                <aop:before method="txadvice" pointcut-ref="mypoint"/>
            </aop:aspect>
        </aop:config>     
</beans>