Question

Using XPath.

I have this doc:

<?xml version="1.0"?>
<root>
  <items>
    <item1>
      <tag1>1</tag1>
      <tag2>DFGGFDGF</tag2> 
      <tag3>3</tag3>
    </item1>

    <item2>
      <tag1>DFGD</tag1>
      <tag2>SDFSDFFSD</tag2>    
      <tag3>SDFSFDFS</tag3>
    </item2>
  </items>
</root>

I want to get the tags names of the item1 element.

Now i use this to get the tags value:

XPathExpression expr = xpath.compile("//"+ node_name +"/*/text()");
Object result = expr.evaluate(doc, XPathConstants.NODESET);
NodeList nodes = (NodeList) result;
for (int i = 0; i < nodes.getLength(); i++) {
  System.out.println(nodes.item(i).getNodeValue()); 
}

How do i get the tags names: tag1, tag2, tag3?

Answer 1

First of all, don’t use text() at the end of your XQuery. You need the nodes themselves. Second, don’t take the node value, you need the node name instead.

XPathExpression expr = xpath.compile("//"+ node_name +"/*");
Object result = expr.evaluate(doc, XPathConstants.NODESET);
NodeList nodes = (NodeList) result;
for (int i = 0; i < nodes.getLength(); i++) {
  System.out.println(nodes.item(i).getNodeName()); 
}