Java HTML/XML - 如何使用XmlPullParser解析XML

import java.io.FileReader;

import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathFactory;

import org.w3c.dom.Node;
import org.xml.sax.InputSource;

public class Main {

  public static void main(String[] args) throws Exception {
    XPathFactory xpf = XPathFactory.newInstance();
    XPath xpath = xpf.newXPath();
    InputSource xml = new InputSource(new FileReader("input.xml"));
    Node result = (Node) xpath.evaluate("/tag1", xml, XPathConstants.NODE);
    System.out.println(result);
  }

}