【笔记】Spring4框架系列 [ 9 ] 之 XML 方式实现 AOP

本文链接：https://blog.youkuaiyun.com/Jul_11th/article/details/54645958

XML实现AOP编程、术语-通知 [ 前置通知、环绕通知、返回后通知、后置通知、异常通知 ]

【PersonDaoImpl】

package com.athl.dao;

public class PersonDaoImpl implements IPersonDao {
    public String query(){
        System.out.println("#执行核心业务:query#");
        return "返回值";
    }
}

【MyAop】

package com.athl.aop;

import org.aspectj.lang.ProceedingJoinPoint;

public class MyAop {

    public void before(){
        System.out.println("+++前置通知+++");
    }

    public void after(){
        System.out.println("+++后置通知+++");
    }

    public Object around(ProceedingJoinPoint pjp)throws Throwable{
        System.out.println(">>>环绕开始<<<");
        Object o = pjp.proceed();
        System.out.println(">>>环绕结束<<<");
        return o;
    }

    public void afterReturning(){
        System.out.println("vvv返回后通知vvv");
    }

    public void afterThrowing(){
        System.out.println("!!!异常通知!!!");
    }

}

【applicationContext.xml】

<?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"
    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">

    <bean id="myAop" class="com.athl.aop.MyAop" />
    <bean id="personDaoImpl" class="com.athl.dao.PersonDaoImpl" />

    <aop:config>
        <aop:pointcut expression="execution(* com.athl.dao.*.*(..))" id="pc"/>
        <aop:aspect ref="myAop">
            <!-- 前置通知： 在目标方法调用前执行 -->
            <aop:before method="before" pointcut-ref="pc"/>
            <!-- 后置通知： -->
            <aop:after method="after" pointcut-ref="pc"/>
            <!-- 环绕通知 -->
            <aop:around method="around" pointcut-ref="pc"/>
            <!-- 返回后通知 -->
            <aop:after-returning method="afterReturning" pointcut-ref="pc"/>
            <!-- 异常通知 -->
            <aop:after-throwing method="afterThrowing" pointcut-ref="pc"/>
        </aop:aspect>
    </aop:config>

</beans>