Spring4之AOP

[www.dev1234.com]一头扎进Spring4视频教程一头扎进Spring4源码[www.java1234.com]《一头扎进Spring4》第七讲 源码

[www.dev1234.com]一头扎进Spring4视频教程一头扎进Spring4源码[www.java1234.com]《一头扎进Spring4》第八讲 源码 

配置：以下重点划出的是新添加进去的　

<?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: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/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd">

、、切面配置如下

    <bean id="studentServiceAspect" class="com.java1234.advice.StudentServiceAspect"></bean> //先创建好两个bean
    <bean id="studentService" class="com.java1234.service.impl.StudentServiceImpl"></bean>
    
    <aop:config>//config  aop标志
        <aop:aspect id="studentServiceAspect" ref="studentServiceAspect"> //aspect定义一个切面，studentServiceAspect是切面类
        //定义切点，是方法级别的，要写表达式{第一个*表示任何是任意，后面的两点..表示参数是任意的}，指定方法
            <aop:pointcut expression="execution(* com.java1234.service.*.*(..))" id="businessService"/>
            <aop:before method="doBefore" pointcut-ref="businessService"/>
            <aop:after method="doAfter" pointcut-ref="businessService"/>
            <aop:around method="doAround" pointcut-ref="businessService"/>//环绕
            <aop:after-returning method="doAfterReturning" pointcut-ref="businessService"/>//返回
            <aop:after-throwing method="doAfterThrowing" pointcut-ref="businessService" throwing="ex"/>//异常
        </aop:aspect> 
    </aop:config>

package com.java1234.advice;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;

public class StudentServiceAspect {

    public void doBefore(JoinPoint jp){
        System.out.println("类名:"+jp.getTarget().getClass().getName());
        System.out.println("方法名："+jp.getSignature().getName());
        System.out.println("开始添加学生："+jp.getArgs()[0]);
    }
    
    public void doAfter(JoinPoint jp){
        System.out.println("类名:"+jp.getTarget().getClass().getName());
        System.out.println("方法名："+jp.getSignature().getName());
        System.out.println("学生添加完成："+jp.getArgs()[0]);
    }
    
    public Object doAround(ProceedingJoinPoint pjp) throws Throwable{
        System.out.println("添加学生前");
        Object retVal=pjp.proceed();
        System.out.println(retVal);
        System.out.println("添加学生后");
        return retVal;
    }
    
    public void doAfterReturning(JoinPoint jp){
        System.out.println("返回通知");
    }
    
    public void doAfterThrowing(JoinPoint jp,Throwable ex){
        System.out.println("异常通知");
        System.out.println("异常信息："+ex.getMessage());
    }
}