1、创建一个SpringBoot项目

2、创建两个目标类和方法

package com.tqazy.learn_spring_project.spring_aop;import org.springframework.stereotype.Service;/*** @ClassName SpringAopUserService* @Description 用户逻辑类* @Author 散场前的温柔* @Date 2023/8/13 19:56* @Version 1.0*/
@Service
public class SpringAopUserService {public void addUser(String userName) {System.out.println("本次新增用户：" + userName);}public void addUser() {System.out.println("本次新增用户：默认用户");}
}

package com.tqazy.learn_spring_project.spring_aop;import org.springframework.stereotype.Service;/*** @ClassName SpringAopUserService* @Description 订单逻辑类* @Author 散场前的温柔* @Date 2023/8/13 19:56* @Version 1.0*/
@Service
public class SpringAopOrderService {public void addOrder(String orderNo) {System.out.println("本次新增订单：" + orderNo);}public void addOrder() {System.out.println("本次新增订单：No0001");}
}

3、创建一个日志切面类

package com.tqazy.learn_spring_project.spring_aop;import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.stereotype.Component;/*** @ClassName LogAspect* @Description 日志切面类* @Author 散场前的温柔* @Date 2023/8/13 19:58* @Version 1.0*/
@Aspect
@Component
public class LogAspect {@Before("execution(* com.tqazy.learn_spring_project.spring_aop.*Service.add*(..))")public void before() {System.out.println("日志：添加方法开始！");}@After("execution(* com.tqazy.learn_spring_project.spring_aop.*Service.add*(..))")public void after() {System.out.println("日志：添加方法完成！");}
}

【注1】：*Service匹配SpringAopOrderService和SpringAopUserService
【注2】：add*(..)的是为了匹配方法名，* (..)是为了匹配方法的任意参数（这里的是execution(后的*）

4、创建一个调用类

package com.tqazy.learn_spring_project.spring_aop;import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;import javax.annotation.Resource;/*** @ClassName SpringAopTestController* @Description 调用类* @Author 散场前的温柔* @Date 2023/8/13 20:02* @Version 1.0*/
@RestController
@RequestMapping("/aop")
public class SpringAopTestController {@Resourceprivate SpringAopUserService userService;@Resourceprivate SpringAopOrderService orderService;@GetMapping("/testMethod")public void testMethod() {userService.addUser();userService.addUser("指定用户");orderService.addOrder();orderService.addOrder("No0002");}
}