配置applicationContext.xml文件

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<? xml version = "1.0" encoding = "UTF-8" ?> < beans xmlns = ""      xmlns:xsi = "" xmlns:context = ""      xmlns:aop = "" xmlns:tx = ""      xsi:schemaLocation="                                                                                     ">      < context:annotation-config />      < context:component-scan base-package = "com.fz.annotation" />      < bean          class = "org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" >          < property name = "locations" value = "classpath:jdbc.properties" />      </ bean >      < bean id = "dataSource" destroy-method = "close"          class = "org.apache.commons.dbcp.BasicDataSource" >          < property name = "driverClassName" value = "${jdbc.driverClassName}" />          < property name = "url" value = "${jdbc.url}" />          < property name = "username" value = "${jdbc.username}" />          < property name = "password" value = "${jdbc.password}" />      </ bean >        < bean id = "sessionFactory"          class = "org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean" >          < property name = "dataSource" ref = "dataSource" />          < property name = "packagesToScan" >              < list >                  < value >com.fz.annotation.model</ value >              </ list >          </ property >          < property name = "hibernateProperties" >              < props >                  < prop key = "hibernate.dialect" >org.hibernate.dialect.MySQLDialect</ prop >                  < prop key = "hibernate.show_sql" >true</ prop >                  < prop key = "hibernate.format_sql" >true</ prop >              </ props >          </ property >      </ bean >      <!-- 使用xml方式管理事务 -->      < bean id = "txManager"          class = "org.springframework.orm.hibernate3.HibernateTransactionManager" >          < property name = "sessionFactory" ref = "sessionFactory" />      </ bean >      < aop:config >          < aop:pointcut              expression = "execution(public * com.fz.annotation.service..*.*(..))"              id = "bussinessService" />          < aop:advisor advice-ref = "txAdvice" pointcut-ref = "bussinessService" />      </ aop:config >      < tx:advice id = "txAdvice" transaction-manager = "txManager" >          < tx:attributes >              <!-- 所有以find开头的方法，readOnly=true -->              < tx:method name = "find*" read-only = "true" />              < tx:method name = "add*" propagation = "REQUIRED" />              < tx:method name = "insert*" propagation = "REQUIRED" />              < tx:method name = "update*" propagation = "REQUIRED" />              < tx:method name = "del*" propagation = "REQUIRED" />              < tx:method name = "delete*" propagation = "REQUIRED" />          </ tx:attributes >      </ tx:advice > </ beans >

1.定义一个aop：pointcut的切入点，也就是需要处理事务的具体service

2.定义一个具体该怎么做的指导aop:advisor，需要指导的pointcut就是刚才定义的pointcut。指导的建议可以自定义一个建议txAdvice

3.txAvice需要使用到数据库，所以需要一个Spring具体管理的事务对象txManager。

4.Spring管理事务又需要SessionFactory,所以又配置一个SessionFactory的属性。而SessionFactory里又指定了一个数据源。