编写一个Web service客户端

public class AmazonSearchService_Impl extends  com.sun.xml.rpc.client.BasicService implements     AmazonSearchService {  private static final QName serviceName =     new QName("http://soap.amazon.com",     "AmazonSearchService");  private static final QName     ns1_AmazonSearchPort_QNAME = new QName(    "http://soap.amazon.com", "AmazonSearchPort");  private static final Class     amazonSearchPort_PortClass =    javapro.amazon.AmazonSearchPort.class;
public java.rmi.Remote getPort(
QName portName, Class serviceDefInterface)
throws javax.xml.rpc.ServiceException
{
// implementation elided
  }
public java.rmi.Remote getPort(
Class serviceDefInterface)
throws javax.xml.rpc.ServiceException
{
// implementation elided
  }
public javapro.amazon.AmazonSearchPort
getAmazonSearchPort() {
String[] roles = new String[] {};
javapro.amazon.AmazonSearchPort_Stub stub =
new javapro.amazon.AmazonSearchPort_Stub(
handlerChain);
return stub;
}
}

    为了使重要的数据更加显而易见，我们省略了很多实现代码。注意，正是getAmazonSearchPort() 方法创建了AmazonSearchport_Stub（就是桩）的一个实例。桩是使用handlerChain进行初始化的（参见清单2）。

信息结构
　　清单2. AmazonSearchPort_Stub是使用handlerChain初始化的桩。我们传递给方法一个AuthorRequest结构，而该方法返回一个ProductInfo结构。

 
public class AmazonSearchPort_Stub
extends com.sun.xml.rpc.client.StubBase
implements javapro.amazon.AmazonSearchPort {
public AmazonSearchPort_Stub(
HandlerChain handlerChain) {
super(handlerChain);
_setProperty(ENDPOINT_ADDRESS_PROPERTY,
"http://soap.amazon.com/onca/soap3");
}
public ProductInfo
authorSearchRequest(
AuthorRequest authorSearchRequest)
throws java.rmi.RemoteException {
try {
StreamingSenderState _state = _start(
_handlerChain);
InternalSOAPMessage _request =
_state.getRequest();
_request.setOperationCode(
AuthorSearchRequest_OPCODE);
AmazonSearchPort_AuthorSearchRequest_
RequestStruct
requestStruct =
new AmazonSearchPort_AuthorSearchRequest_
RequestStruct();
requestStruct.setAuthorSearchRequest(
authorSearchRequest);
SOAPBlockInfo _bodyBlock =
new SOAPBlockInfo(
ns1_AuthorSearchRequest_AuthorSearchRequest_
QNAME);
_bodyBlock.setValue
(requestStruct);
_bodyBlock.setSerializer(
ns1requestStruct_SOAPSerializer);
_request.setBody(_bodyBlock);
_state.getMessageContext().setProperty(
HttpClientTransport.HTTP_SOAPACTION_PROPERTY,
"http://soap.amazon.com");
_send((String) _getProperty(
ENDPOINT_ADDRESS_PROPERTY), _state);
AmazonSearchPort_AuthorSearchRequest_
ResponseStruct
responseStruct = null;
Object _responseObj = _state.getResponse().
getBody().getValue();
if (_responseObj instanceof
SOAPDeserializationState) {
responseStruct =(
AmazonSearchPort_AuthorSearchRequest_
ResponseStruct)
((SOAPDeserializationState)_responseObj).
getInstance();
} else {
responseStruct = (
AmazonSearchPort_AuthorSearchRequest_
ResponseStruct)
_responseObj;
}
return responseStruct.get_return();
} catch (RemoteException e) {
// let this one through unchanged
      throw e;
} catch (JAXRPCException e) {
throw new RemoteException(e.getMessage(), e);
} catch (Exception e) {
if (e instanceof RuntimeException) {
throw (RuntimeException)e;
} else {
throw new RemoteException(e.getMessage(), e);
}
}
}
}