xml JAVA

[Norazanita Adnan]

i need help...im so lost

my XML file
<veryDOC>
<MYDOCUMENT>
<DOCUMENT>
<STUDENT>
<NAME>Anorexic Al</NAME>
<ADDR>10 Slimway Rd</ADDR>
<GRADE>A</GRADE>
</STUDENT>
<STUDENT>
<NAME>Bulimic Bill</NAME>
<ADDR> 123 Upchuck Drive</ADDR>
<GRADE>B+</GRADE>
</STUDENT>
<STUDENT>
<NAME>Cadaverous Chen</NAME>
<ADDR>14 Mordant St.</ADDR>
<GRADE>B-</GRADE>
</STUDENT>
</DOCUMENT>
</MYDOCUMENT>
</veryDOC>

i want to write java code that read all the xml file and print out the output in the console like this...

(STUDENT , NAME ,Anorexic Al)
(STUDENT , ADDR ,10 Slimway Rd)
(STUDENT , GRADE ,A)
(STUDENT , NAME ,Bulimic Bill)
(STUDENT , ADDR ,123 Upchuck Drive)
(STUDENT , GRADE ,B+)
(STUDENT , NAME ,Cadaverous Chen)
(STUDENT , ADDR ,14 Mordant St)
(STUDENT , GRADE ,B-)
(DOCUMENT , STUDENT , NAME)
(MYDOCUMENT, DOCUMENT,STUDENT)
(veryDOC , MYDOCUMENT ,DOCUMENT)


meaning it will travers to the very inner child node and go up to the root

anyway is it possible to be done?
ive try few example but it cant read the value unless we do it something like

NodeList listOfPersons = doc.getElementsByTagName("STUDENT");

..i need to make the code flexible as i dont know the name of element in xml files.

is there any example that similar to this.hope someone able to help me..

thanks in advance

[Gamini Sirisena]

With DOM you may need to go recursive here. Try with getChildNodes

[Norazanita Adnan]

import java.io.*;
 
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.*;
 
import org.w3c.dom.Node;
import org.w3c.dom.*;
 
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.*;
 

 
public class XMLjavaAG {


 public static void main (String argv []){
    try {
 
    
    BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
    System.out.print("Enter XML File name: ");
       String xmlFile = bf.readLine();
       File file = new File(xmlFile);
//       if(file.exists()){

//create factory
        DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
     // Use the factory to create a builder
        DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
        Document doc = docBuilder.parse(xmlFile);
        // normalize text representation
        doc.getDocumentElement ().normalize ();
 
            // Once we have the tree, extract the root.
    Element root = doc.getDocumentElement ();
    System.out.println ("Root element of the doc is " + root.getNodeName());
 
            // Now traverse the tree.
    System.out.println ("TRAVERSE ...");
    traverse (root);
 
           
 
    }catch (SAXParseException err) {
    System.out.println ("** Parsing error" + ", line " 
         + err.getLineNumber () + ", uri " + err.getSystemId ());
    System.out.println(" " + err.getMessage ());
 
    }catch (SAXException e) {
    Exception x = e.getException ();
    ((x == null) ? e : x).printStackTrace ();
 
    }catch (Throwable t) {
    t.printStackTrace ();
    }
 
    
 
}//end of main
 
 
 public static void traverse (Node n)
 {
   // Extract node info:
 
   String nodename = n.getNodeName();
    String nodeValue = n.getNodeValue();
   // Remove the whitespace using trim().
   if (nodeValue != null)
   nodeValue = nodeValue.trim(); //trim the white space
 
   // Print and continue traversing.
   System.out.println ("Node: " + nodename + " value=[" + nodeValue + "]");
    
 
   // Now traverse the rest of the tree in depth-first order.
   if (n.hasChildNodes()) {
     // Get the children in a list.
     NodeList nl = n.getChildNodes();
 
     // How many of them?
     int size = nl.getLength();
     for (int i=0; i<size; i++)
       // Recursively traverse each of the children.
       traverse (nl.item(i));
 
     
   }
 }
 
}

this is my code and this is the result :-

Enter XML File name: student.xml
Root element of the doc is veryDOC
TRAVERSE ...
Node: veryDOC value=[null]
Node: #text value=[]
Node: MYDOCUMENT value=[null]
Node: #text value=[]
Node: DOCUMENT value=[null]
Node: #text value=[]
Node: STUDENT value=[null]
Node: #text value=[]
Node: NAME value=[null]
Node: #text value=[Anorexic Al]
Node: #text value=[]
Node: ADDR value=[null]
Node: #text value=[10 Slimway Rd]
Node: #text value=[]
Node: GRADE value=[null]
Node: #text value=[A]
Node: #text value=[]
Node: #text value=[]
Node: STUDENT value=[null]
Node: #text value=[]
Node: NAME value=[null]
Node: #text value=[Bulimic Bill]
Node: #text value=[]
Node: ADDR value=[null]
Node: #text value=[123 Upchuck Drive]
Node: #text value=[]
Node: GRADE value=[null]
Node: #text value=[B+]
Node: #text value=[]
Node: #text value=[]
Node: STUDENT value=[null]
Node: #text value=[]
Node: NAME value=[null]
Node: #text value=[Cadaverous Chen]
Node: #text value=[]
Node: ADDR value=[null]
Node: #text value=[14 Mordant St.]
Node: #text value=[]
Node: GRADE value=[null]
Node: #text value=[B-]
Node: #text value=[]
Node: #text value=[]
Node: #text value=[]
Node: #text value=[]

what can i modify to make it

(STUDENT , NAME ,Anorexic Al)
(STUDENT , ADDR ,10 Slimway Rd)
(STUDENT , GRADE ,A)
(STUDENT , NAME ,Bulimic Bill)
(STUDENT , ADDR ,123 Upchuck Drive)
(STUDENT , GRADE ,B+)
(STUDENT , NAME ,Cadaverous Chen)
(STUDENT , ADDR ,14 Mordant St)
(STUDENT , GRADE ,B-)
(DOCUMENT , STUDENT , NAME)
(MYDOCUMENT, DOCUMENT,STUDENT)
(veryDOC , MYDOCUMENT ,DOCUMENT)

any idea??

hope anyone can help me