How to define the type "ns1:DataHandler"?

axis       WSDL2java       报错:DataHandler       is       referenced       but       not       defined.   
该webService直接用Call写客户端正常,用上面的生成客户端工具报错.   
发布前wsdd文件:   
<deployment       xmlns="http://xml.apache.org/axis/wsdd/"      
xmlns:java="http://xml.apache.org/axis/wsdd/providers/java"      
xmlns:ns1="http://127.0.0.1/wss/services/FileService"   
>   
        <service       name="urn:FileService"       provider="java:RPC">   
        <namespace>   http://xml.apache.org/xml-soap   </namespace>   //此处,是参考网络上对于这个问题的解决意见,经实验,无效!                                   
<parameter       name="className"       value="org.wss.webservice.services.FileService"/>   
             <parameter       name="allowedMethods"       value="*"/>   
             <parameter       name="allowedRoles"       value="user"/>   
             <operation       name="getFile" returnQName="returnqname" returnType="ns1:DataHandler"      
                xmlns:SchemaNS="http://www.w3.org/2001/XMlSchema">   
                 <parameter       name="name"       type="SchemaNS:string"/>   
              </operation>   
                    
    <typeMapping       deserializer="org.apache.axis.encoding.ser.JAFDataHandlerDeserializerFactory"      
                                                                    type="java:javax.activation.DataHandler"    qname="ns1:DataHandler"      
                                                                    serializer="org.apache.axis.encoding.ser.JAFDataHandlerSerializerFactory"      
                                                                    encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"/>   
        </service>   
</deployment>

[[it] 本帖最后由 kingyor 于 2008-2-26 09:46 编辑 [/it]]
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版主能不能回答一下。
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