新手学习Spring 遇到 AOP的问题 ，非常苦恼 ，百度了两天用各种方法无果，恳请各位帮忙看看。

Question

刚开始学习Spring，练习前置通知时出了问题。
原代码如下：

这是一个实现加减乘除的

package com.atguigu.spring.aop;

import org.springframework.stereotype.Component;

@Component("arithmeticCalculator")
public class ArithmeticCalculatorImpl implements ArithmeticCalculator {

    @Override
    public int add(int i, int j) {
        int result = i + j;
        return result;
    }

    @Override
    public int sub(int i, int j) {
        int result = i - j;
        return result;
    }

    @Override
    public int mul(int i, int j) {
        int result = i * j;
        return result;
    }

    @Override
    public int div(int i, int j) {
        int result = i / j;
        return result;
    }

}

这是Aspect

@Aspect
@Component
public class LoggingAspect {

    @Before("execution(public int com.atguigu.spring.aop.ArithmeticCalculator.*(int, int))")
    public void beforeMethod(JoinPoint joinPoint){
        String methodName = joinPoint.getSignature().getName();
        Object [] args = joinPoint.getArgs();

        System.out.println("The method " + methodName + " begins with " + Arrays.asList(args));
    }

    @After("execution(* com.atguigu.spring.aop.*.*(..))")
    public void afterMethod(JoinPoint joinPoint){
        String methodName = joinPoint.getSignature().getName();
        System.out.println("The method " + methodName + " ends");
    }

}

配置如下：

<?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"
    xmlns:context="http://www.springframework.org/schema/context"
    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-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">

    <!-- 自动扫描的包 -->
    <context:component-scan base-package="com.atguigu.spring.aop"></context:component-scan>

    <!-- 使AspectJ  -->
    <aop:aspectj-autoproxy></aop:aspectj-autoproxy>

</beans>

下面是测试

public class Main {

    public static void main(String[] args) {
        ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext-aop.xml");
        ArithmeticCalculator arithmeticCalculator = (ArithmeticCalculator) ctx.getBean("arithmeticCalculator");
        System.out.println(arithmeticCalculator.getClass().getName());
        int result = arithmeticCalculator.add(11, 12);
        System.out.println("result:" + result);

        result = arithmeticCalculator.div(21, 3);
        System.out.println("result:" + result);
    }

}

然后问题就来了 。 。 。 。 。。

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'arithmeticCalculator' defined in file [D:\javaWebWorkpace\spring-2-0\build\classes\com\atguigu\spring\aop\ArithmeticCalculatorImpl.class]: Initialization of bean failed; nested exception is java.lang.NoClassDefFoundError: Could not initialize class org.aspectj.util.LangUtil
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:547)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:700)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
    at com.atguigu.spring.aop.Main.main(Main.java:11)
Caused by: java.lang.NoClassDefFoundError: Could not initialize class org.aspectj.util.LangUtil
    at org.aspectj.weaver.reflect.ReflectionWorld.<init>(ReflectionWorld.java:52)
    at org.aspectj.weaver.tools.PointcutParser.setClassLoader(PointcutParser.java:221)
    at org.aspectj.weaver.tools.PointcutParser.<init>(PointcutParser.java:207)
    at org.aspectj.weaver.tools.PointcutParser.getPointcutParserSupportingSpecifiedPrimitivesAndUsingSpecifiedClassLoaderForResolution(PointcutParser.java:168)
    at org.springframework.aop.aspectj.AspectJExpressionPointcut.initializePointcutParser(AspectJExpressionPointcut.java:221)
    at org.springframework.aop.aspectj.AspectJExpressionPointcut.buildPointcutExpression(AspectJExpressionPointcut.java:204)
    at org.springframework.aop.aspectj.AspectJExpressionPointcut.buildPointcutExpression(AspectJExpressionPointcut.java:197)
    at org.springframework.aop.aspectj.AspectJExpressionPointcut.checkReadyToMatch(AspectJExpressionPointcut.java:186)
    at org.springframework.aop.aspectj.AspectJExpressionPointcut.getClassFilter(AspectJExpressionPointcut.java:166)
    at org.springframework.aop.support.AopUtils.canApply(AopUtils.java:208)
    at org.springframework.aop.support.AopUtils.canApply(AopUtils.java:262)
    at org.springframework.aop.support.AopUtils.findAdvisorsThatCanApply(AopUtils.java:294)
    at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.findAdvisorsThatCanApply(AbstractAdvisorAutoProxyCreator.java:118)
    at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.findEligibleAdvisors(AbstractAdvisorAutoProxyCreator.java:88)
    at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.getAdvicesAndAdvisorsForBean(AbstractAdvisorAutoProxyCreator.java:69)
    at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.wrapIfNecessary(AbstractAutoProxyCreator.java:372)
    at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessAfterInitialization(AbstractAutoProxyCreator.java:335)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:421)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1558)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
    ... 11 more

实在搞不清楚哪里错了 ， 我把项目发给别人运行（IDEA），运行结果不会报错。我是照着教学视频（教学用eclipse）敲的，在我这里运行（我也用eclipse） 就报错了。感觉也不是缺少什么jar包吧，那会是什么问题呢，恳求各路大神支招，帮帮小白，谢谢啦

Answer 1

应该就是缺少了org.aspectj.weaver的jar包，加下面的依赖试试

    <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
        <dependency>
                <groupId>org.aspectj</groupId>
                <artifactId>aspectjweaver</artifactId>
                <version>1.9.5</version>
        </dependency>