Question

I have parsed my HTML/JSP into DOM at compile time using JAVA. Now I have the w3c.dom.Document object with me, let’s say for the below HTML

.....
  ....
<input type="text" name="EnterName"/>
<select name="SelectOptions">
<option>First</option>
<option>Second</option>
</select>
 ......
.......

I know the attributes values of the elements. Here “EnterName” is the “name” attributes value of the node “input”.

Suppose I have attributes values of all nodes available in DOM (like “EnterName”, “SelectOptions” of above HTML), how do I can get a node in which a particular attribute is available with the given value. Thanks

EDIT :

I will never know whats the HTML contents. My program should run on
given list of HTML/JSP files and I have with me some element names.
Here the element name refers to the label/name of the fields available
in the HTML/JSP. So I need to traverse through all the files get the
node where it has the same label/name and get the node.

Answer 1

Try something like this:

    DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
    DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
    Document doc = dBuilder.parse("yourDocumentName");
    doc.getDocumentElement().normalize();
    NodeList nlList = doc.getElementsByTagName("input");
    for (int indx= 0; indx < nList.getLength(); indx++) {
       Element eElement = (Element) nList.item(indx);
       if(eElement.getAttribute("name").equals("EnterName")){
              System.out.println("EnterName: " + eElement.getNodeValue());
       }
    }

    NodeList nlList1 = doc.getElementsByTagName("select");
    for (int indx= 0; indx < nList1.getLength(); indx++) {
       Element eElement = (Element) nList1.item(indx);
       if(eElement.getAttribute("name").equals("SelectOptions")){
              System.out.println("SelectOptions: " + eElement.getNodeValue());
       }
    }

If you could add the “id” to your elements then its much easier:

 <input type="text" name="EnterName" id="name"/>
 <select name="SelectOptions" id="options">
  ...


  Element nameElement = doc.getElementbyId("name");
  System.out.println("EnterName: " + nameElement.getNodeValue());
  Element selectElement = doc.getElementbyId("name");
  System.out.println("SelectOptions: " + selectElement.getNodeValue());