四种通知的执行地方：前置通知
try{
业务代码
后置通知
} catch{
异常通知
} finally{
最终通知
}
1.需要的jar包：aspectjrt.jar，aspectjweaver.jar，cglib-nodep-2.1.3.jar
2.在配置文件中加入
<?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:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
">
<bean id="myXmlAspect" class="com.yjw.aspect.MyXmlAspect"/>
<!-- 配置事务切面-->
<aop:config>
<aop:aspect ref="myXmlAspect">
<aop:pointcut expression="execution(* com.yjw.dao..*.*(..))" id="pointcut"/>
<aop:before method="beforeAdvice" pointcut-ref="pointcut"/>
<aop:after-returning method="afterReturningAdvice" returning="value" pointcut-ref="pointcut"/>
<aop:after-throwing method="exceptionAdvice" pointcut-ref="pointcut" throwing="ex"/>
<aop:after method="afterAdvice" pointcut-ref="pointcut"/>
</aop:aspect>
</aop:config>
</beans>
package com.yjw.aspect;
public class MyXmlAspect {
//前置通知
public void beforeAdvice(){
System.out.println("前置通知");
}
//异常通知,接收异常信息
public void exceptionAdvice(Exception ex){
System.out.println("异常出现"+ex.getMessage());
}
//后置通知,可以接收方法的返回值
public void afterReturningAdvice(Object value){
System.out.println("后置通知"+value);
}
//最终通知
public void afterAdvice(){
System.out.println("after");
}
}