关于HelloWorld的Web Service问题请教！

我仿照以下文章试着做一个HelloWorld的Web Service，结果在操作的过程中出错了。。
网址：http://www-900.ibm.com/developerWorks/cn/webservices/ws-startaxis/index.shtml

当我按照它上面说的进行到：
C:\>Java -Djava.ext.dirs=lib org.apache.axis.wsdl.WSDL2Java http://localhost:8080/axis/Hello.jws?wsdl
这一步就通不过了，我一执行上面的命令就出错，错误信息如下：
C:\>Java -Djava.ext.dirs=lib org.apache.axis.wsdl.WSDL2Java http://localhost:8080/axis/Hello.jws?wsdl
Exception in thread "main" java.lang.NoClassDefFoundError: org.apache.commons.lo
gging.LogFactory
at org.apache.axis.components.logger.LogFactory.class$(LogFactory.java:8
4)
at org.apache.axis.components.logger.LogFactory$1.run(LogFactory.java:84
)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.axis.components.logger.LogFactory.getLogFactory(LogFactory
.java:80)
at org.apache.axis.components.logger.LogFactory.<clinit>(LogFactory.java
:72)
at org.apache.axis.i18n.ProjectResourceBundle.<clinit>(ProjectResourceBu
ndle.java:92)
at org.apache.axis.i18n.MessagesConstants.<clinit>(MessagesConstants.jav
a:71)
at org.apache.axis.utils.Messages.<clinit>(Messages.java:75)
at org.apache.axis.wsdl.WSDL2Java.<clinit>(WSDL2Java.java:99)

麻烦大家帮我看看啊。。急啊！多谢了！：）