该错误是在练习Spring - aop的时候出现的

先说总结有利于大家还有没有必要往后面在继续看下去：错误出在获取bean的时候，我获取的是该接口的实现类类型，解决办法就是获取该接口的类型，不要获取该接口的实现类
项目架构

Maven

<dependencies>
        <!--   spring核心包     -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>5.1.0.RELEASE</version>
        </dependency>
        <!--aop 需要的包-->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.1</version>
        </dependency>

        <dependency>
            <groupId>aopalliance</groupId>
            <artifactId>aopalliance</artifactId>
            <version>1.0</version>
        </dependency>

        <!-- spring 核心包 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.1.0.RELEASE</version>
        </dependency>

        <!-- 日志包-->
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.1.1</version>
        </dependency>

    </dependencies>

xml

<?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:context="http://www.springframework.org/schema/context"
       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/context
       http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd">

    <!-- 扫描com.stone.dome包下的所有注解 -->
    <context:component-scan base-package="com.stone.aopdome"/>

    <!--    开启基于注解的aop 功能-->
    <aop:aspectj-autoproxy></aop:aspectj-autoproxy>


</beans>

Operation类

@Component
public interface Operation
{
    //  加法
     double add(double i,double j);
    //  减法
     double subtract(double i,double j);
    //  乘法
     double mul(double i,double j);
    //  除法
      double div(double i,double j);
}

Operation目标类

@Component
public class OperationImpl implements Operation
{
    @Override
    public double add(double i, double j)
    {
        return i+j;
    }

    @Override
    public double subtract(double i, double j)
    {
        return i-j;
    }

    @Override
    public double mul(double i, double j)
    {
        return i*j;
    }

    @Override
    public double div(double i, double j)
    {
        return i/j;
    }
}

OperationProxy 目标实现类

@Aspect
@Component
public class OperationProxy
{
    //   execution切入点表达式 (访问修饰符 返回值类型 目标执行的方法)
    @Before("execution(public double com.stone.aopdome.operation.impl.OperationImpl.add(double,double))")
    public void logbefore(){
        System.out.println("我是前置通知");
    }

    @After("execution(public double com.stone.aopdome.operation.impl.OperationImpl.add(double,double))")
    public void logAfter(){
        System.out.println("我是后置通知");
    }


    @AfterThrowing("execution(public double com.stone.aopdome.operation.impl.OperationImpl.add(double,double))")
    public void logException(){
        System.out.println("我是异常通知");
    }
    @AfterReturning("execution(public double com.stone.aopdome.operation.impl.OperationImpl.add(double,double))")
    public void logFinal(){
        System.out.println("我是最终通知");
    }
}

SpringAopTest 测试类

public class SpringAopTest
{
    private ApplicationContext ioc = new ClassPathXmlApplicationContext("applicationContext.xml");

    @Test
    public void testaop1(){
        Operation bean = ioc.getBean(OperationImpl.class);
        double add = bean.add(12.0, 20.0);
        System.out.println(add);

    }
}

个人本来以为是缺少了什么Maven依赖造成的 ，可原因并不是如此，而是我获取bean的时候，是获取了该类的实现类，解决错误的办法就是在获取bean的时候，不要获取目标对象的实现类，直接获取该接口类就行

错误代码

错误修改