java – 如何在XML DOM对象中添加命名空间前缀？

<m:documentObject xmlns:m="http://www.myschema.com">
    <sender>token</sender>
    <receiver>token</receiver>
    <payload>token</payload>
</m:documentObject>

这是我到目前为止.

Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
Element requestElement = document.createElementNS("http://www.myschema.com","documentObject");

document.appendChild(requestElement);

Element sender = document.createElement("sender");
requestElement.appendChild(sender);     
Text senderText = document.createTextNode("Xmlsender");
sender.appendChild(senderText); 

Element receiver = document.createElement("receiver");
requestElement.appendChild(receiver);       
Text receiverText = document.createTextNode("Xmlreceiver");
receiver.appendChild(receiverText); 

Element payload = document.createElement("payload");
requestElement.appendChild(payload);        
Text payloadText = document.createTextNode("Xmlpayload");
payload.appendChild(payloadText);   

StringWriter sw = new StringWriter();
StreamResult result = new StreamResult(sw);

DOMSource source = new DOMSource(requestElement);

TransformerFactory tf = TransformerFactory.newInstance();
Transformer transformer = tf.newTransformer();
transformer.setOutputProperty(OutputKeys.ENCODING,"utf-8"); 
transformer.transform(source,result);

String xmlString = sw.toString();
System.out.println(xmlString)

由于某些原因,当我运行上面的架构出来没有前缀.如下所示：

<?xml version="1.0" encoding="utf-8"?>
<documentObject xmlns="http://www.myschema.com">
    <sender>Xmlsender</sender>
    <receiver>Xmlreceiver</receiver>
    <payload>Xmlpayload</payload>
</documentObject>

我需要做什么,以便XML完全如第一个XML示例所示,名称空间前缀和标签具有命名空间前缀？

我正在尝试创建一个XML字符串,该字符串将用于Spring-WS webservice,该Web服务器希望使用第一个示例中显示的格式的JAXB对象.