UserDao.java接口：

package com.liu.jdk;public interface UserDao {public void addUser();public void deleteUser();}

UserDaoImpl.java實現類/目標類：

package com.liu.jdk;import org.springframework.stereotype.Repository;//目標類 @Repository("userDao") public class UserDaoImpl implements UserDao {@Overridepublic void addUser() {// TODO Auto-generated method stubSystem.out.println("添加方法");int i = 1/0;}@Overridepublic void deleteUser() {// TODO Auto-generated method stubSystem.out.println("刪除方法");}}

MyAspect.java切面類：

package com.liu.aspect.annotation;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;

//切面類
@Aspect
@Component
public class MyAspect {
@Pointcut(“execution(* com.liu.jdk..(…))”)
//需要一個返回值為void 方法體為空的方法來命名切入點
private void myPointCut() {}

//前置通知 @Before("myPointCut()") public void before(JoinPoint joinPoint) {System.out.println("前置通知開始，模擬檢查權限 ");System.out.println("目標類："+joinPoint.getTarget());System.out.println("目標方法為："+joinPoint.getSignature().getName()); } //后置通知 @AfterReturning("myPointCut()") public void afterRunning(JoinPoint joinPoint) {System.out.println("后置通知開始，模擬記錄日志");System.out.println("目標方法為："+joinPoint.getSignature().getName()); }//環繞通知 @Around("myPointCut()") public Object around(ProceedingJoinPoint proceedingJoinPoint)throws Throwable {System.out.println("環繞通知開始");Object obj = proceedingJoinPoint.proceed();System.out.println("環繞通知結束");return obj; }//異常通知 @AfterThrowing(value = "myPointCut()",throwing = "e") public void afterThrowing(JoinPoint joinPoint,Throwable e) {System.out.println("異常通知,原因在于："+e.getMessage()); }//最終通知 @After("myPointCut()") public void after() {System.out.println("最終通知"); }

}

ApplicationContext.xml配置文件：

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans"xmlns:aop="http://www.springframework.org/schema/aop"xmlns:context="http://www.springframework.org/schema/context"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-4.3.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-4.3.xsd http://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-4.3.xsd "><!-- 指定需要掃描的包 開啟注解--><context:component-scan base-package="com.liu"></context:component-scan><!-- 啟動基于注解的聲明式AspectJ支持 --><aop:aspectj-autoproxy /> </beans>

Test測試類：

package com.liu.aspect.annotation;import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext;import com.liu.jdk.UserDao;public class Test {public static void main(String[] args) {String xmlpath = "com/liu/aspect/annotation/ApplicationContext.xml";ApplicationContext applicationContext = new ClassPathXmlApplicationContext(xmlpath);UserDao userDao = (UserDao) applicationContext.getBean("userDao");userDao.addUser();}}

運行結果：

環繞通知開始 前置通知開始，模擬檢查權限 目標類：com.liu.jdk.UserDaoImpl@5158b42f 目標方法為：addUser 添加方法 最終通知 異常通知,原因在于：/ by zero

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