如何在java中动态创建自定义xml元素(或自定义javafx场景控件)

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.newDocument();

Element rootElement = doc.createElement("RootElement");
doc.appendChild(rootElement);

Element customElement = doc.createElement("CustomElement");
rootElement.appendChild(customElement);

customElement.setAttribute("attributeName", "attributeValue");

customElement.appendChild(doc.createTextNode("Element Text Content"));

// 保存到文件
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
DOMSource source = new DOMSource(doc);
StreamResult result = new StreamResult(new File("output.xml"));
transformer.transform(source, result);

// 输出到控制台
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
DOMSource source = new DOMSource(doc);
StreamResult result = new StreamResult(System.out);
transformer.transform(source, result);

FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("CustomControl.fxml"));
Parent root = fxmlLoader.load();

CustomControl customControl = fxmlLoader.getController();

customControl.setText("Hello World");

Scene scene = new Scene(root);

Stage stage = new Stage();
stage.setScene(scene);
stage.show();