用DOM实现Java编辑XML文件

import org.w3c.dom.*;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.*;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.File;

public class XMLModifier {
    public static void main(String[] args) {
        try {
            // 创建DocumentBuilderFactory实例
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();

            // 解析XML文件
            File xmlFile = new File("example.xml");
            Document doc = builder.parse(xmlFile);

            // 获取根元素
            Element root = doc.getDocumentElement();

            // 创建一个新的元素
            Element newElement = doc.createElement("newElement");
            newElement.appendChild(doc.createTextNode("New Content"));

            // 将新元素添加到根元素
            root.appendChild(newElement);

            // 将修改后的文档写回文件
            TransformerFactory transformerFactory = TransformerFactory.newInstance();
            Transformer transformer = transformerFactory.newTransformer();
            DOMSource source = new DOMSource(doc);
            StreamResult result = new StreamResult(new File("example_modified.xml"));
            transformer.transform(source, result);

            System.out.println("XML文件已修改并保存。");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}