有没有办法强制Transformer在XML中使用unicode转义时写入空格？

Transformer transformer = TransformerFactory.newInstance().newTransformer();

transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
transformer.setOutputProperty(OutputKeys.INDENT, "yes");

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.newDocument();

// 创建XML内容
Element rootElement = document.createElement("root");
document.appendChild(rootElement);

// 添加包含空格字符的文本节点
Text textNode = document.createTextNode(" ");
rootElement.appendChild(textNode);

DOMSource source = new DOMSource(document);

StreamResult result = new StreamResult(new File("output.xml"));

transformer.transform(source, result);