Java获取指定父节点、子节点的方法实现

Node parentNode = node.getParentNode();

Element parentElement = element.parent();

NodeList childNodes = node.getChildNodes();

Elements childElements = element.children();

import org.w3c.dom.*;

public class DOMExample {
    public static void main(String[] args) {
        // 你的 XML 或 HTML 文档
        String xml = "<root><parent><child1/><child2/></parent></root>";

        try {
            // 创建 DOM 文档对象
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            Document doc = builder.parse(new InputSource(new StringReader(xml)));

            // 获取指定节点
            Node node = doc.getElementsByTagName("child1").item(0);

            // 获取父节点
            Node parentNode = node.getParentNode();
            System.out.println("Parent Node: " + parentNode.getNodeName());

            // 获取子节点
            NodeList childNodes = node.getChildNodes();
            System.out.println("Child Nodes of " + node.getNodeName() + ":");
            for (int i = 0; i < childNodes.getLength(); i++) {
                Node childNode = childNodes.item(i);
                System.out.println(childNode.getNodeName());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}