Read XML into Java Array

[tony deprato]

Hi I am trying to use this code to put my xml info into an array and I cant seem to get it to work right. Sorry I am new to XML and Java.
------------------------------------------

import java.io.File;
import java.io.IOException;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
 
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
 
import org.jdom.input.SAXBuilder;
import org.jdom.output.*;
public class SomeClass {
   
  public static void main(String[] args) {
    {
 
      Document doc = null;
      SAXBuilder sb = new SAXBuilder();
 
      try {
        doc = sb.build(new File("cuni.xml"));
        XMLOutputter output = new XMLOutputter();  // And output the document ... 
        output.output(doc, System.out);  // ... unchanged to System.out
   
        System.out.println("lets print elements");
        Element root = doc.getRootText();
        System.out.println(root);
        //String text=name.getText();
        List attributes=root.getAttributes();
        System.out.println(attributes.size());
        List children = root.getChildren();
        //System.out.println("number of immediate childern "+children.size());
        //System.out.println(children+"the children");
        @SuppressWarnings("unused")
        String children2 = ((Element) children).getTextTrim();
        System.out.println("______");
        System.out.println(children2);
        System.out.println("number of immediate childern "+children.size());
        System.out.println(children+" _______----------_________");
        System.out.println();
        //Element canada=null;
            
        //String text = table.getTextTrim();

        //String title=root.getTextTrim();
        @SuppressWarnings("unused")
        //List x = root.getChild.getTextTrim("course");
        String x = root.getChild("uni").getChild("course").getTextTrim();
        //String x = root.getChild("course").getTextTrim();
        System.out.println(x);
        //x.toArray();
        System.out.println(x+"test");
 
 
            
      }
           
            
        
        catch (JDOMException e) {
          e.printStackTrace();
        }
        catch (IOException e) {
          e.printStackTrace();
        }
    
 
      }
    }
 
 
  }

--------------------------------------------------------
[ April 13, 2007: Message edited by: Paul Clapham ]

[Paul Clapham]

Tony, I reformatted your code by putting the code tags around it and fixing up the indentation to make it consistent. Easier on the eyes that way. Now, you say it doesn't work right. Can you tell us what it is supposed to do? All we see there is the code, so all we can tell is what it actually does. And it would help if you posted the input XML document too.

[tony deprato]

Sorry --here is the xml doc

 
<?xml version="1.0" encoding="ISO-8859-1"?>
 
<schoo>
<uni>
<name>Algmau</name>
<province>
Ontario
</province>
<town>Sault St. Maria</town>
Algmau
<course>
Bachelor of Arts; Bachelor of Science; Bachelor of Science;
Bachelor of Liberal Science;
Bachelor of Computer Science; Bachelor of Social Work
</course>
</uni>
<uni>
<name>Brock University</name>
<province>Ontario</province>
<town>Saint Catherine's</town>
<course>Faculty of Applied Health Sciences
Faculty of Business
Faculty of Education
Faculty of Humanities
Faculty of Mathematics and Science
Faculty of Social Sciences  </course>
</uni>
<uni>
<name>Memorial University of Newfoundland</name>
<province>New Foundland and Labrador</province>
<town>Saint Johns</town>
<course>Bachelor of Arts; 
Bachelor of Business Administrations Education</course>
</uni>
<uni>
<name>Trent University</name>
<province>Ontario</province>
<town>Peterborough</town>
<course>Business Administration Health Sciences; 
Eduction; 
Law; 
Interdisciplinary; 
Science; 
Arts </course>
</uni>
<uni>
<name>University of Alberta International</name>
<province>Alberta</province>
<town>Edmonton</town>
<course> Faculty of Agriculture,
Forestry and Home Economics;
Faculty of Arts,
Augustan Faculty Fine Arts,
Humanities,
Physical Education,
Science;
Social Sciences;
Faculty of Education; 
Faculty of Engineering; 
Faculty of Law; 
Faculty of Medicine and Dentistry; School of Native Studies; 
Faculty of Nursing; 
Faculty of Pharmacy and Pharmaceutical Sciences; 
Faculty of Physical Education and Recreation; 
Campus Saint-Jean (French-language faculty); 
Faculty of Science</course>
</uni>
<uni>
<name>The University of British Columbia</name>
<province>British Columbia</province>
<town>Vancouver</town>
<course>Faculty of Applied Science: 
Faculty of Arts; 
Souder School of Business; 
Faculty of Forestry; 
School of Human Kinetics; 
School of Music; 
School of Nursing; 
Faculty of Science; Post Baccalaureate and Professional Programs; HWEALTH sciences</course>
</uni>
<uni>
<name>University of Toronto at Scarborough</name>
<province>Ontario</province>
<town>Toronto</town>
<course>Arts; Science, Business Administration</course>
</uni>
</schoo>
 

 

 

    

[Ulf Dittmer]

I cant seem to get it to work right.

As Paul said, that is not a very useful problem description. What exactly should the code do, and how does its behavior deviate from that?

[tony deprato]

Sorry, I thought I stated it above. This java code should read xml elements into an array. I can only get the first element in the first position of the array. I ran my xml through a validator and it seems fine. I have used xml with php before but not Java.

CN

[Roger F. Gay]

Tony. I have experience with XML processing in JavaScript ... so this might just be a question rather than a solution. Shouldn't there be a loop somewhere that is used to transfer xml data one element at a time into an array? I wondered what the lists are getting ... note that getAttributes and getChildren are plural ... but then you say you're only getting the first one.

Should there be some kind of x.item(i) i=0,1,2... kind of thing? x being the result of a get.
[ April 14, 2007: Message edited by: Roger F. Gay ]

[Paul Clapham]

I don't think your code is doing anything much. And I'm not even sure it will run correctly if you run it. For example this:

List children = root.getChildren();

gets you a list of seven "uni" elements. (At least I think it does, I'm not really familiar with JDOM but that seems like the most reasonable thing for it to do.) But then you do this:

String children2 = ((Element) children).getTextTrim();

And that, I think, should throw a ClassCastException. I wouldn't expect to be able to cast a List to an Element.

So, you might want to have a look at some JDOM tutorials. (The easiest way to find them is to stick "jdom tutorial" into your favourite Internet search engine and look at what comes back, but beware of old tutorials because JDOM went through a number of changes before version 1.0 was finalized.) Here is one that isn't too old, for example.

If you just want to put those seven "uni" elements into an array, then you have them in a List already so it's easy to get an array from that List. But I suspect your requirements will go beyond that once you get used to working with XML. So take some code from the tutorials and fiddle around with it.