What is JDOM?

A Pure Java API for reading and writing XML Documents
A Java-oriented API for reading and writing XML Documents
A tree-oriented API for reading and writing XML Documents
A parser independent API for reading and writing XML Documents

Here is a simple java code which generates a simple xml file:



< ?xml version="1.0" encoding="UTF-8"? >
Hello JDOM!

The relevant code is


import org.jdom.*;
import org.jdom.output.XMLOutputter;


public class HelloJDOM {

 public static void main(String[] args) {
 
   Element root = new Element("GREETING");
   
   root.setText("Hello JDOM!");
       
   Document doc = new Document(root);     
  
   // At this point the document only exists in memory.
   // We still need to serialize it
   XMLOutputter outputter = new XMLOutputter();
   try {
     outputter.output(doc, System.out);      
   }
   catch (Exception e) {
     System.err.println(e);
   }

 }

}

See,how simple is it....Now if we wanted to do this using the usual DOM....


import java.io.*;
import org.w3c.dom.*;
import org.apache.xerces.dom.*;
import org.apache.xml.serialize.*;


public class HelloDOM {

 public static void main(String[] args) {
 
   try {
    
     DOMImplementationImpl impl = (DOMImplementationImpl)
      DOMImplementationImpl.getDOMImplementation();
     
     DocumentType type = impl.createDocumentType("GREETING", null, null);
    
     // type is supposed to be able to be null,
     // but in practice that didn't work                    
     DocumentImpl hello
      = (DocumentImpl) impl.createDocument(null, "GREETING", type);
    
     Element root = hello.createElement("GREETING");
    
     // We can't use a raw string. Instead we have to first create
     // a text node.
     Text text = hello.createTextNode("Hello DOM!");
     root.appendChild(text);
    
     // Now that the document is created we need to *serialize* it
     try {
       OutputFormat format = new OutputFormat(hello);
       XMLSerializer serializer = new XMLSerializer(System.out, format);
       serializer.serialize(root);
     }
     catch (IOException e) {
       System.err.println(e);
     }
   }
   catch (DOMException e) {
     e.printStackTrace();
   }

 }

}