Как добавить новые элементы в существующий xml файл на java?

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DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();

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Document doc = builder.parse(new File("example.xml"));

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Element newElement = doc.createElement("newElement");
newElement.setAttribute("attribute1", "value1");
newElement.setAttribute("attribute2", "value2");
newElement.setTextContent("Text content for new element");

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Element parentElement = doc.getElementById("parentId");

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parentElement.appendChild(newElement);

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TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
DOMSource source = new DOMSource(doc);
StreamResult result = new StreamResult(new File("example.xml"));
transformer.transform(source, result);