按照教程搭建了一个CXF的WebService服务，但是发布不成功。该怎么解决

按照教程搭建了一个CXF的WebService服务，但是发布不成功。
例子很简单，就3个文件：
HelloWorld.java 接口类

Java code

package ws.cxf;import javax.jws.WebService; import javax.jws.WebParam;@WebServicepublic interface HellpWorld {    String SayHi(@WebParam(name = "text") String text);}

HelloWorldImpl.java 实现接口类

Java code

package ws.cxf;import javax.jws.WebService;@WebService(    endpointInterface="ws.cxf.HelloWorld",//端点接口名称     serviceName="HelloWorld")//服务名称public class HelloWorldImpl implements HellpWorld {    public String SayHi(String text) {        // TODO 自动生成方法存根        return "Hello" + text;    }}

HelloWorldApp.java 发布程序

Java code

package ws.cxf;import javax.xml.ws.Endpoint;public class HelloWorldApp {    public static void main(String[] args) {        // TODO 自动生成方法存根            System.out.println("Starting Server...");            HelloWorldImpl implementor=new HelloWorldImpl();            String url="http://localhost:9000/HelloWorld";            Endpoint.publish(url, implementor);            System.out.println("Server Started.");    }}

完成后在tomcat中运行，出现的错误如下：
Exception in thread "main" javax.xml.ws.WebServiceException: Could not load Webservice SEI
at org.apache.cxf.jaxws.support.JaxWsImplementorInfo.initialize(JaxWsImplementorInfo.java:276)
at org.apache.cxf.jaxws.support.JaxWsImplementorInfo.<init>(JaxWsImplementorInfo.java:57)
at org.apache.cxf.jaxws.EndpointImpl.getServer(EndpointImpl.java:289)
at org.apache.cxf.jaxws.EndpointImpl.doPublish(EndpointImpl.java:259)
at org.apache.cxf.jaxws.EndpointImpl.publish(EndpointImpl.java:209)
at org.apache.cxf.jaxws.spi.ProviderImpl.createAndPublishEndpoint(ProviderImpl.java:84)
at javax.xml.ws.Endpoint.publish(Endpoint.java:47)
at ws.cxf.HelloWorldApp.main(HelloWorldApp.java:26)
Caused by: java.lang.ClassNotFoundException: ws.cxf.HelloWorld
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at org.apache.cxf.common.classloader.ClassLoaderUtils.loadClass2(ClassLoaderUtils.java:236)
at org.apache.cxf.common.classloader.ClassLoaderUtils.loadClass(ClassLoaderUtils.java:222)
at org.apache.cxf.jaxws.support.JaxWsImplementorInfo.initialize(JaxWsImplementorInfo.java:274)
... 7 more

刚接触webservice，请问为什么会有ClassNotFoundException异常？教程上能顺利通过呢。

等待大侠。。。


------解决方案--------------------
HelloWorld
HellpWorld 

你睁大眼睛看看！
------解决方案--------------------
接分
------解决方案--------------------