1、业务类

package spring.example.aop;

import org.springframework.stereotype.Component;

@Component
public class Dao {
    public void insert(){
        System.out.println("insert ...");
    }
}

2、通知

package spring.example.aop;

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

@Aspect
@Component
public class Log {
    @Before("execution(* spring.example.aop.Dao.insert(..))")
    public void log() {
        System.out.println("log around ...");
    }
}

3、切入配置

package spring.example.aop;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableAspectJAutoProxy;

@Configuration
@ComponentScan(value ="spring.example.aop" )
@EnableAspectJAutoProxy(proxyTargetClass = true)
public class Config {
}

4、主类

package spring.example.aop;

import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class Main {
    public static void main(String[] args) {
        ApplicationContext context=new AnnotationConfigApplicationContext(Config.class);
        Dao dao = context.getBean("dao", Dao.class);
        dao.insert();
    }
}

一个创业中的苦逼程序员