Java HTML/XML - 如何在XML文件中搜索元素值

import java.io.File;

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathFactory;

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

public class Main {
  public static void main(String[] args) throws Exception {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    Document doc = factory.newDocumentBuilder().parse(new File("Sample.xml"));
    XPathFactory xFactory = XPathFactory.newInstance();
    XPath xPath = xFactory.newXPath();
    XPathExpression exp = xPath
        .compile("/article/body/section/region[contains(translate(text(), 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'), 'perfect')]");
    NodeList nl = (NodeList) exp.evaluate(doc.getFirstChild(),
        XPathConstants.NODESET);
    for (int index = 0; index < nl.getLength(); index++) {
      Node node = nl.item(index);
      System.out.println(node.getTextContent());
    }
  }
}