Java将属性和值追加到现有XML

<root>
    <element1>Value 1</element1>
    <element2>Value 2</element2>
</root>

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import org.w3c.dom.*;

public class XMLAppendExample {
    public static void main(String[] args) {
        try {
            // 加载现有的XML文档
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            Document document = builder.parse("existing.xml");

            // 创建属性和值节点
            Element newElement = document.createElement("newElement");
            newElement.setAttribute("attribute", "value");

            Text newValue = document.createTextNode("New Value");
            newElement.appendChild(newValue);

            // 将属性和值节点追加到XML文档中
            Node root = document.getDocumentElement();
            root.appendChild(newElement);

            // 保存修改后的XML文档
            TransformerFactory transformerFactory = TransformerFactory.newInstance();
            Transformer transformer = transformerFactory.newTransformer();
            transformer.setOutputProperty(OutputKeys.INDENT, "yes");
            DOMSource source = new DOMSource(document);
            StreamResult result = new StreamResult(new File("modified.xml"));
            transformer.transform(source, result);

            System.out.println("属性和值已成功追加到XML文档中！");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}