web service异常问题

Question

小第正在学web service,发布了一个服务
package com;public class Demo 
{
public PersonVO get(PersonPO po)
{
PersonVO vo = new PersonVO();
vo.setName(po.getName());

return vo;
}
}
package com;import java.io.Serializable;public class PersonPO implements Serializable
{ /**
 * 
 */
private static final long serialVersionUID = -8113703760271692700L;
private String name; public String getName() {
return name;
} public void setName(String name) {
this.name = name;
}
}
package com;import java.io.Serializable;public class PersonVO  implements Serializable
{
/**
 * 
 */
private static final long serialVersionUID = -2552553868601517353L;
private String name; public String getName() {
return name;
} public void setName(String name) {
this.name = name;
}
}在客户端调用时报如下异常
AxisFault
 faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server.userException
 faultSubcode: 
 faultString: org.xml.sax.SAXException: SimpleDeserializer encountered a child element, which is NOT expected, in something it was trying to deserialize.
 faultActor: 
 faultNode: 
 faultDetail: 
{http://xml.apache.org/axis/}hostname:xiang-360a95c1forg.xml.sax.SAXException: SimpleDeserializer encountered a child element, which is NOT expected, in something it was trying to deserialize.
at org.apache.axis.message.SOAPFaultBuilder.createFault(SOAPFaultBuilder.java:222)
at org.apache.axis.message.SOAPFaultBuilder.endElement(SOAPFaultBuilder.java:129)
at org.apache.axis.encoding.DeserializationContext.endElement(DeserializationContext.java:1087)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanEndElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
at javax.xml.parsers.SAXParser.parse(Unknown Source)
at org.apache.axis.encoding.DeserializationContext.parse(DeserializationContext.java:227)
at org.apache.axis.SOAPPart.getAsSOAPEnvelope(SOAPPart.java:696)
at org.apache.axis.Message.getSOAPEnvelope(Message.java:435)
at org.apache.axis.handlers.soap.MustUnderstandChecker.invoke(MustUnderstandChecker.java:62)
at org.apache.axis.client.AxisClient.invoke(AxisClient.java:206)
at org.apache.axis.client.Call.invokeEngine(Call.java:2784)
at org.apache.axis.client.Call.invoke(Call.java:2767)
at org.apache.axis.client.Call.invoke(Call.java:2443)
at org.apache.axis.client.Call.invoke(Call.java:2366)
at org.apache.axis.client.Call.invoke(Call.java:1812)
at com.test.DemoSoapBindingStub.get(DemoSoapBindingStub.java:162)
at com.test.DemoSoapBindingImpl.get(DemoSoapBindingImpl.java:24)
at com.test.Test.main(Test.java:16)
好像是说不能反序列化,请部该怎样处理,是不是要对传入和返回的对象做一些什么处理