package com.murong.aop;import org.springframework.stereotype.Component;/*** 目标对象*/
@Component // 加入IOC容器
public class UserDao
{public void save(){System.out.println("-----核心业务：保存！！！------");}
}

package com.murong.aop;import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;/***切面类*/
@Component // 加入IOC容器
@Aspect
public class Aop
{@Pointcut("execution(* com.murong.aop.UserDao.*(..))")//切入点public  void testPointCut(){}@Before("testPointCut()")public void begin(){System.out.println("事务开启123");}//关注点代码
@After("testPointCut()")public void end(){System.out.println("事务结束456");}//关注点代码
}

<?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:context="http://www.springframework.org/schema/context"xmlns:aop="http://www.springframework.org/schema/aop"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop.xsd"default-autowire="byType"><!-- 开启注解扫描 --><context:component-scan base-package="com.murong.aop"></context:component-scan><!--开启注解扫描--><aop:aspectj-autoproxy></aop:aspectj-autoproxy></beans>

package com.murong.aop;import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;public class App
{private ApplicationContext ac = new ClassPathXmlApplicationContext("com/murong/aop/applicationContext");@Testpublic void test(){UserDao dao = (UserDao) ac.getBean("userDao");dao.save();}
}