为什么调用setTextContent不会出现在转换后的输出中？

Question

The following dom manipulation should result in a different output, but it doesn't. The println indicates it has worked, but the root node.toString() or using a Transformer fails with equal results.

  private void markNewLinesInTextNodes(Node node) {
    for(int i = 0 ; i < node.getChildNodes().getLength() ; i++) {
      Node child = node.getChildNodes().item(i);
      markNewLinesInTextNodes(child);
    }
    if (node instanceof Element) {
      Element el = (Element) node;
      if (el.getTagName().toLowerCase().equals("text")) {
        el.setTextContent(el.getTextContent().replaceAll("\n", "_LINEBREAK_"));
        System.out.println(el.getTextContent());
      }
    }
  }

Answer 1

this works:

  if (el.getTagName().toLowerCase().equals("text")) {
    el.setTextContent(el.getTextContent().replaceAll("\n", "_LINEBREAK_"));
    System.out.println(el.getTextContent());

Then :

• are you sure of the selection ?

• how do you output it ?

try that:

TransformerFactory transFactory = TransformerFactory.newInstance();
Transformer transformer = transFactory.newTransformer();
StringWriter buffer = new StringWriter();
transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
transformer.transform(new DOMSource(document),
      new StreamResult(buffer));
String result= buffer.toString();
System.out.println(result);