我有以下肥皂反应。现在我想用合适的值替换空值。我怎样才能实现它?
<?xml version='1.0' encoding='utf-8'?>
<soapenv:Envelope xmlns:soapenv="http://www.w3.org/2003/05/soapenvelope">
<soapenv:Body>
<Entries xmlns="http://ws.wso2.org/dataservice">
<Entry>
<empId>xxx</empId>
<empName>yyy</empName>
<allocatedDesk>null</allocatedDesk>
</Entry>
</Entries>
</soapenv:Body>
</soapenv:Envelope>