Java 如何将前缀应用于SOAP消息中的所有子元素

在构造SOAP消息时，使用

QName

和

javax.xml.SOAP.Name向
ext:msg\u LocationDetails
元素的子元素添加前缀时出现问题

我使用的是
javax.xml.soap.SOAPFactory

当我尝试使用
QName mag=newqname（“，”Messages“，”ext”）
（新的QName（namespaceURI、localPart、前缀））

下面是SOAP消息

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ext="http://extdomain.com/">
   <soapenv:Header/>
   <soapenv:Body>
      <ext:msg_LocationDetails>
        <ext:Messages>
            <ext:Message>
               <ext:Location>GSA</ext:Location>
               <ext:LocCode>Unit</ext:LocCode>
               <ext:LocID>00004</ext:LocID>
               <ext:SystemID>TSKSLSLSJJ</ext:SystemID>
               <ext:Status>
                  <ext:ID>4</ext:ID>
                  <ext:Name>PENDING</ext:Name>            
               </ext:Status>
             </ext:Message>  
        </ext:Messages>
      </ext:msg_LocationDetails>
    </soapenv:Header/>
 </soapenv:Body>


GSA
单位
00004
tskslsjj
4.
悬而未决的
为什么要将空字符串作为
QName
构造函数中的第一个参数传递？根据XML示例，名称空间URI应该是
http://extdomain.com/
。根据需要生成的消息，我在子元素中不需要它。
SOAPBody soapBody = soapEnvelope.getBody();
    soapBody = soapMessage.getSOAPBody();
    soapBody.setPrefix("soapenv");
    // To add some element
    SOAPFactory soapFactory = SOAPFactory.newInstance();

    Name bodyName = soapFactory.createName("msg_LocationDetails");
    SOAPBodyElement locationDetails = soapBody.addBodyElement(bodyName);
    locationDetails.setPrefix("ext");

    QName mag = new QName("","Messages","ext");
    SOAPElement messages = locationDetails.addChildElement(mag);
    //SOAPElement messages = locationDetails.addChildElement("Messages");
    //messages.addNamespaceDeclaration("fir", "");
    //SOAPElement message = messages.addChildElement("message");

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ext="http://extdomain.com/">
   <soapenv:Header/>
   <soapenv:Body>
      <ext:msg_LocationDetails>
        <ext:Messages>
            <ext:Message>
               <ext:Location>GSA</ext:Location>
               <ext:LocCode>Unit</ext:LocCode>
               <ext:LocID>00004</ext:LocID>
               <ext:SystemID>TSKSLSLSJJ</ext:SystemID>
               <ext:Status>
                  <ext:ID>4</ext:ID>
                  <ext:Name>PENDING</ext:Name>            
               </ext:Status>
             </ext:Message>  
        </ext:Messages>
      </ext:msg_LocationDetails>
    </soapenv:Header/>
 </soapenv:Body>