Service接口

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package com.ledao.service;

/**
 * @author LeDao
 * @company
 * @create 2022-02-17 20:29
 */
public interface StudentService {

    /**
     * 添加学生
     */
    void add();

    /**
     * 删除学生
     */
    void delete();

    /**
     * 修改学生
     */
    void update();

    /**
     * 根据id查找学生
     */
    void findById();
}

Service接口实现类

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package com.ledao.service.impl;

import com.ledao.service.StudentService;

/**
 * @author LeDao
 * @company
 * @create 2022-02-17 20:30
 */
public class StudentServiceImpl implements StudentService {

    @Override
    public void add() {
        System.out.println("添加学生");
    }

    @Override
    public void delete() {
        System.out.println("删除学生");
    }

    @Override
    public void update() {
        System.out.println("修改学生");
    }

    @Override
    public void findById() {
        System.out.println("根据id查找学生");
    }
}

自定义切入类

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package com.ledao.diy;

/**
 * @author LeDao
 * @company
 * @create 2022-02-17 22:12
 */
public class DiyPointCut {

    public void before(){
        System.out.println("---------执行方法前---------");
    }

    public void after(){
        System.out.println("---------执行方法后---------");
    }
}

配置文件ApplicationContext.xml

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<?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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd">

    <!--注册bean-->
    <bean id="studentService" class="com.ledao.service.impl.StudentServiceImpl"/>
    <bean id="diyPointCut" class="com.ledao.diy.DiyPointCut"/>

    <aop:config>
        <aop:aspect ref="diyPointCut">
            <!--切入点-->
            <aop:pointcut id="pointcut" expression="execution(* com.ledao.service.impl.StudentServiceImpl.*(..))"/>
            <!--通知-->
            <aop:before method="before" pointcut-ref="pointcut"/>
            <aop:after method="after" pointcut-ref="pointcut"/>
        </aop:aspect>
    </aop:config>
</beans>

测试

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import com.ledao.service.StudentService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * @author LeDao
 * @company
 * @create 2022-02-12 15:56
 */
public class MyTest {

    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("ApplicationContext.xml");
        StudentService studentService = context.getBean("studentService", StudentService.class);
        studentService.add();
    }
}

结果截图

image-20220217222031941