Java中基于条件的多级xml节点读取

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

public class XMLParser {
    public static void main(String[] args) {
        try {
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            Document document = builder.parse("example.xml");

            // 获取根节点
            Element root = document.getDocumentElement();

            // 获取所有符合条件的节点
            NodeList nodeList = root.getElementsByTagName("book");

            for (int i = 0; i < nodeList.getLength(); i++) {
                Node node = nodeList.item(i);
                if (node.getNodeType() == Node.ELEMENT_NODE) {
                    Element element = (Element) node;

                    // 获取节点的属性值
                    String id = element.getAttribute("id");

                    // 获取子节点的文本内容
                    String title = element.getElementsByTagName("title").item(0).getTextContent();
                    String author = element.getElementsByTagName("author").item(0).getTextContent();

                    System.out.println("Book ID: " + id);
                    System.out.println("Title: " + title);
                    System.out.println("Author: " + author);
                    System.out.println("--------------------");
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}