XmlUtils.java 文件源码

public static Node getChildNode(Document doc, String parentTag, String childnode) {
  try {
    XPath xpath = XPathFactory.newInstance().newXPath();
    XPathExpression expr = xpath.compile("//" + parentTag + "/" + childnode);
    Object obj = expr.evaluate(doc, XPathConstants.NODE);
    return obj != null ? (Node) obj : null;
  } catch (Exception ex) {
    ex.printStackTrace();
  }
  return null;
}