我有这样的肥皂请求消息
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:tes="http://testwork/">
<soapenv:Header/>
<soapenv:Body>
<tes:sayHelloWorldFrom>
<arg0>value</arg0>
</tes:sayHelloWorldFrom>
</soapenv:Body>
</soapenv:Envelope>
我想从此消息中检索正文,因此我想
<soapenv:Body>
<tes:sayHelloWorldFrom>
<arg0>value</arg0>
</tes:sayHelloWorldFrom>
</soapenv:Body>
我该如何检索它? Thanx提前