小编Noo*_*pta的帖子

我正在用 Java 中的 DOM api 创建一个 XML，如下所示

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.newDocument();
Element root = document.createElement("root");
document.appendChild(root);
Element one = document.createElementNS("http://ns1", "one");
root.appendChild(one);
one.setPrefix("ns1");

Element two = document.createElementNS("http://ns1", "two");
one.appendChild(two);

当使用以下代码打印上述 DOM 时，会在所有元素上生成命名空间声明（在这种情况下，在元素一和二上）。我如何确保命名空间声明的前缀是继承的，并且转换器不会在每个元素上重新声明它们 -

代码：

public static String transformDOMtoText(final org.w3c.dom.Node domElement) throws TransformerException {

 final Transformer transformer = getTransformer();
 final DOMSource domSource = new DOMSource(domElement);

 final StringWriter stringWriter = new StringWriter();
 final StreamResult result = new StreamResult(stringWriter);
 transformer.setOutputProperty(OutputKeys.INDENT, "yes"); //$NON-NLS-1$ //$NON-NLS-2$
 transformer.setOutputProperty(
   OutputKeys.OMIT_XML_DECLARATION, …