零、需要的依赖：

        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.8.9</version>
        </dependency>

        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.8.9</version>
        </dependency>

一、定义服务

package cn.edu.tju.study.service.aspect;

import cn.edu.tju.study.service.MyBusiness;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;

@Service
public class MyDemoService {

    public void myMethod()
    {
        System.out.println("in my method...");
    }
}

二、定义切面

package cn.edu.tju.study.service.aspect;

import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.stereotype.Component;

@Component
@Aspect
public class MyAspect {
    @Before("execution(* cn.edu.tju.study.service.aspect.*.*(..))")
    public void aop(){
        System.out.println("before method executing......");
    }
}

三、定义配置文件

package cn.edu.tju.study.service;

import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableAspectJAutoProxy;
import org.springframework.stereotype.Component;

@Configuration
@EnableAspectJAutoProxy(proxyTargetClass = true)//
@ComponentScan(basePackages = "cn.edu.tju.study.service.aspect")
public class MyConfig3 {



}

四、定义测试主类：

package cn.edu.tju.study.service;

import cn.edu.tju.study.service.aspect.MyDemoService;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class AopAnnotationTest3 {
    public static void main(String[] args) {
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
        context.register(MyConfig3.class);
        context.refresh();


        MyDemoService myDemoService = context.getBean("myDemoService", MyDemoService.class);
        myDemoService.myMethod();


    }
}

五、执行结果：