package com.mengma.aspectj.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 {
// 用于取代：<aop:pointcut
// expression="execution(*com.mengma.dao..*.*(..))" id="myPointCut"/>
// 要求：方法必須是private，沒有值，名稱自定義，沒有參數(shù)
@Pointcut("execution(*com.mengma.dao..*.*(..))")
private void myPointCut() {
}

// 前置通知
@Before("myPointCut()")
public void myBefore(JoinPoint joinPoint) {
System.out.print("前置通知，目標(biāo)：");
System.out.print(joinPoint.getTarget() + "方法名稱:");
System.out.println(joinPoint.getSignature().getName());
}

// 后置通知
@AfterReturning(value = "myPointCut()")
public void myAfterReturning(JoinPoint joinPoint) {
System.out.print("后置通知，方法名稱：" + joinPoint.getSignature().getName());
}

// 環(huán)繞通知
@Around("myPointCut()")
public Object myAround(ProceedingJoinPoint proceedingJoinPoint)
throws Throwable {
System.out.println("環(huán)繞開始"); // 開始
Object obj = proceedingJoinPoint.proceed(); // 執(zhí)行當(dāng)前目標(biāo)方法
System.out.println("環(huán)繞結(jié)束"); // 結(jié)束
return obj;
}

// 異常通知
@AfterThrowing(value = "myPointCut()", throwing = "e")
public void myAfterThrowing(JoinPoint joinPoint, Throwable e) {
System.out.println("異常通知" + "出錯(cuò)了" + e.getMessage());
}

// 最終通知
@After("myPointCut()")
public void myAfter() {
System.out.println("最終通知");
}
}

import org.springframework.stereotype.Repository;
@Repository("customerDao")
public class CustomerDao {
  public void doSome(){
    // int i=1/0;
    System.out.println("正式業(yè)務(wù)");
  }
}

<?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"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!--掃描含com.mengma包下的所有注解-->
<context:component-scan base-package="com.mengma"/>
<!-- 使切面開啟自動(dòng)代理 -->
<aop:aspectj-autoproxy></aop:aspectj-autoproxy>
</beans>

package com.mengma.aspectj.annotation;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.mengma.dao.CustomerDao;

public class AnnotationTest {
@Test
public void test() {
String xmlPath = "com/mengma/aspectj/xml/applicationContext.xml";
ApplicationContext applicationContext = new ClassPathXmlApplicationContext(
xmlPath);
// 從spring容器獲取實(shí)例
CustomerDao customerDao = (CustomerDao) applicationContext
.getBean("customerDao");
// 執(zhí)行方法
customerDao.add();
}
}