创建项目，引入jar包

编写目标类，切面类并完成配置

package spring.day2_aop2;
/*
 * 编写目标类
 */
public class OrderDao {
    
    public void save() {
        System.out.println("orderDao的save方法已经执行......");
    }
    public void delete() {
        System.out.println("orderDao的delete方法已经执行......");
    }
    public void update() {
        System.out.println("orderDao的update方法已经执行......");
    }
    public void find() {
        System.out.println("orderDao的find方法已经执行......");
    }
    
}

package spring.day2_aop2;

/*
 * 编写切面类
 */

public class MyAspect {
    
    public void checkPri() {
        System.out.println("=============权限校验(前置通知)=============");
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<!-- ===============================引入aop开发的约束============================ -->
<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 
        http://www.springframework.org/schema/aop/spring-aop.xsd">
        
        <!-- ====在注解文件里开启aop的开发===== -->
        <aop:aspectj-autoproxy></aop:aspectj-autoproxy>
        
       <!-- 配置目标类 --> 
       <bean id="orderDao" class="spring.day2_aop2.OrderDao"></bean>
       
       <!-- 配置切面类 -->
       <bean id="myAspect" class="spring.day2_aop2.MyAspect"></bean>
       
        
</beans>

在配置文件中开启aop的注解开发

使用注解对目标类进行增强

package spring.day2_aop2;

import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;

/*
 * 编写切面类
 */
@Aspect
public class MyAspect {
    
    @Before(value="execution(* spring.day2_aop2.OrderDao.save(..))")
    public void checkPri() {
        System.out.println("=============权限校验(前置通知)=============");
    }
}

编写测试类并完成测试

package spring.day2_aop2;

import javax.annotation.Resource;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

/*
 * 编写测试类
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext5.xml")
public class SpringDemo1 {

    @Resource(name="orderDao")
    private OrderDao orderDao;

    @Test
    public void demo1() {
        orderDao.save();
        orderDao.delete();
        orderDao.update();
        orderDao.find();
    }
}