这种格式的xml如何在后台解析得到

Question

<?xml version="1.0"?>
<soapenv:Envelope xmlns:rxas="http://schemas.datacontract.org/2004/07/RxAssystLib.Contracts.Data" xmlns:tem="http://tempuri.org/" xmlns:soapenv="http://www.888en.com/soap/envelope/">   <soapenv:Header/>   
<soapenv:Body>      
<tem:User>         
<rxas:Password>Blackbox</rxas:Password>       http://www.cbyulecheng.com
  
<rxas:UserName>jm</rxas:UserName>      
</tem:User>   
</soapenv:Body>
</soapenv:Envelope>这种格式的xml如何在后台解析得到username 和 password的值?使用dom4j 取不到值