Spring 3@Aspect使用问题

package com.spring3.chrp07.aspectj.aspectj;



import org.aspectj.lang.annotation.Aspect;

import org.aspectj.lang.annotation.Before;



@Aspect

public class PreGreetingAspect {

	@Before("execution(* greetTo(..))")

	public void beforeGreeting(){

		System.out.println("How are you!");

	}

}

package com.spring3.chrp07.aspectj.aspectj;







import org.springframework.aop.aspectj.annotation.AspectJProxyFactory;



import com.spring3.chrp06.advice.NaiveWaiter;

import com.spring3.chrp06.advice.Waiter;



public class AspectJProxyTest {

	public static void main(String[] args) {

		Waiter target = new NaiveWaiter();

		AspectJProxyFactory factory = new AspectJProxyFactory();

		factory.setTarget(target);

		factory.addAspect(PreGreetingAspect.class);

		

		Waiter proxy = factory.getProxy();

		

		proxy.greetTo("JOHN");

		proxy.serveTo("JOHN");

	}

}

以上是我做的一个小demo，greetTo和serveTo均是打印文字。

看似配置没有错，但是报了类初始化相关的错误，找不到原因，求高人帮看一下

Exception in thread "main" java.lang.NoClassDefFoundError: org/aspectj/weaver/BCException
at org.springframework.aop.aspectj.annotation.ReflectiveAspectJAdvisorFactory.getPointcut(ReflectiveAspectJAdvisorFactory.java:187)
at org.springframework.aop.aspectj.annotation.ReflectiveAspectJAdvisorFactory.getAdvisor(ReflectiveAspectJAdvisorFactory.java:172)
at org.springframework.aop.aspectj.annotation.ReflectiveAspectJAdvisorFactory.getAdvisors(ReflectiveAspectJAdvisorFactory.java:105)
at org.springframework.aop.aspectj.annotation.AspectJProxyFactory.addAdvisorsFromAspectInstanceFactory(AspectJProxyFactory.java:121)
at org.springframework.aop.aspectj.annotation.AspectJProxyFactory.addAspect(AspectJProxyFactory.java:111)
at com.spring3.chrp07.aspectj.aspectj.AspectJProxyTest.main(AspectJProxyTest.java:15)
Caused by: java.lang.ClassNotFoundException: org.aspectj.weaver.BCException
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
... 6 more

------解决方案--------------------
没有aspectjweaver.jar