如何在java中将新创建的DOM文档文件保存为.xml？

import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;

Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();

Element rootElement = document.createElement("root");
document.appendChild(rootElement);

Element childElement = document.createElement("child");
rootElement.appendChild(childElement);

// 添加属性
childElement.setAttribute("attribute", "value");

// 添加文本内容
childElement.appendChild(document.createTextNode("Text content"));

Transformer transformer = TransformerFactory.newInstance().newTransformer();
DOMSource source = new DOMSource(document);
StreamResult result = new StreamResult(new File("path/to/file.xml"));
transformer.transform(source, result);