Java Web服务调用和泛型，奇怪的行为

我有一个web服务界面，如下所示：

@WebService
@SOAPBinding(style = SOAPBinding.Style.RPC)
public interface MyWS<T> {    
    @WebMethod Person getRow(int id);

    @WebMethod T insertRow(T a);    
}

奇怪，哈

---

发生了什么事？

是发布的jar中的

com.myproject.Person

？是的。真奇怪！它不起作用。

Exception in thread "main" javax.xml.ws.WebServiceException: javax.xml.bind.MarshalException
 - with linked exception:
[com.sun.istack.internal.SAXException2: class com.myproject.Person nor any of its super class is known to this context.
javax.xml.bind.JAXBException: class com.myproject.Person nor any of its super class is known to this context.]