查找重复的XML元素名称（带有变量的xPath）

只需尝试获取具有适当路径表达式的子节点列表，然后检查该列表中是否存在重复项即可：

   XPathexpression xPathexpression = xPath.compile("//parentNode/*");   NodeList children = (NodeList) xPathexpression.evaluate(config, XPathConstants.NODESET);   for (int i = 0; i < children.getLength(); i++) {   // maintain hashset of clients here and check if element is already there   }