一个小小的AopDemo

一、首先是Maven配置

导入spring依赖

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>5.0.7.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>5.0.7.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aop</artifactId>
    <version>5.0.7.RELEASE</version>
</dependency>
<dependency>
    <groupId>aopalliance</groupId>
    <artifactId>aopalliance</artifactId>
    <version>1.0</version>
</dependency>
<dependency>
    <groupId>org.aspectj</groupId>
    <artifactId>aspectjweaver</artifactId>
    <version>1.9.1</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aspects</artifactId>
    <version>5.0.7.RELEASE</version>
</dependency>

二、配置扫描包，开启AspectJ的配置类

package com.cks.config;

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

@ComponentScan("com.cks")
@Configuration
//开启aspectJ
@EnableAspectJAutoProxy
public class AppConfig {
}

三、所需要被增强的Service

package com.cks.service;

import org.springframework.stereotype.Service;

@Service
public class UserService {

    public void queryUser(){
        System.out.println("查询用户service");
    }

    public void addUser(){
        System.out.println("新增用户service");
    }
}

四、切面，切点设置

package com.cks.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;

@Aspect
@Component
public class SimpleAspect {

//    例: execution(* com.demo..service.*Service.add*(String))
//    com.demo 包及其子包下的service包下，类名以Service结尾，方法以add开头，参数类型为String的方法的切点
    @Pointcut("execution(* com.cks.service.*Service.add*(..))")
    public void pointOne(){}

    @Before("pointOne()")
    public void adviceOne(){
        System.out.println("添加成功！！！");
    }


    //定义execution对同一类下方法级别的切点
    @Pointcut("execution(* com.cks.service.*Service.query*(..))")
    public void pointSec(){}
    
    //对切点不同的增强
    @After("pointSec()")
    public void adviceSec(){
        System.out.println("查询成功！！！");
    }

}

五、启动测试

package com.cks;

import com.cks.config.AppConfig;
import com.cks.service.UserService;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class Demo {

    public static void main(String[] args) {

        AnnotationConfigApplicationContext app = new AnnotationConfigApplicationContext(AppConfig.class);

        UserService userService = app.getBean(UserService.class);

        //添加用户
        userService.addUser();

        //查询用户
        userService.queryUser();
    }

}

六、查看结果