将新元素添加到xml树的特定部分

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

public class AddElementToXML {
    public static void main(String[] args) {
        try {
            // 加载XML文件
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            Document doc = builder.parse("input.xml");

            // 定位目标节点
            Element targetNode = (Element) doc.getElementsByTagName("targetNode").item(0);

            // 创建新元素
            Element newElement = doc.createElement("newElement");
            newElement.setAttribute("attribute", "value");
            newElement.setTextContent("Content of new element");

            // 将新元素插入到目标节点
            targetNode.appendChild(newElement);

            // 保存修改后的XML
            // ...

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}