java: xml解析和获取属性

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import java.io.File;

public class XMLParser {
    public static void main(String[] args) {
        try {
            // 创建解析器工厂
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            // 创建解析器
            DocumentBuilder builder = factory.newDocumentBuilder();
            // 解析XML文件
            Document document = builder.parse(new File("example.xml"));
            
            // 获取根元素
            Element root = document.getDocumentElement();
            
            // 获取指定元素的属性
            NodeList nodeList = root.getElementsByTagName("book");
            Element book = (Element) nodeList.item(0);
            String title = book.getAttribute("title");
            System.out.println("Title: " + title);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}