关于spring配置jpa事物了，但是我想加入aop切面留着做日志，不知道怎么加入

<?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:jdbc="http://www.springframework.org/schema/jdbc" 
xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:jpa="http://www.springframework.org/schema/data/jpa" xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.1.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.1.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"
default-lazy-init="true">

<description>Spring公共配置 </description>

<!-- 使用annotation 自动注册bean, 并保证@Required、@Autowired的属性被注入 -->
<context:component-scan base-package="com.zz.auth">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>

<!-- Jpa Entity Manager 配置 -->
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="jpaVendorAdapter" ref="hibernateJpaVendorAdapter"/>
<property name="packagesToScan" value="com.zz.auth.entity"/>
<property name="jpaProperties">
<props>
<!-- 命名规则 My_NAME->MyName -->
<prop key="hibernate.ejb.naming_strategy">org.hibernate.cfg.ImprovedNamingStrategy</prop>
</props>
</property>
</bean>

<bean id="hibernateJpaVendorAdapter" class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="database" value="SQL_SERVER" /> 
        <property name="showSql" value="true" />
</bean>

<!-- Jpa 事务配置 -->
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>

<!-- Spring Data Jpa配置 -->
<jpa:repositories base-package="com.zz.auth.dao"  transaction-manager-ref="transactionManager" entity-manager-factory-ref="entityManagerFactory"/>
  
<!-- 使用annotation定义事务 -->
<tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true" />

<!-- DBCP连接池 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="defaultAutoCommit" value="false" />
</bean>
</beans>


这事原来的啊！代码！我想加入aop切面作为才做日志！不知道怎么下手！请高手讲解一下。