Parsing an xml using SAX Parser

Here, this program parses an xml using SAX Parser. All the data of the xml including tags are stored in an stringbuffer in xml format.

Also, this program checks wheather the input xml is well formed or not. If it is not well formed, it will throw an exception.

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.SAXNotSupportedException;
import org.xml.sax.helpers.DefaultHandler;
 
public class ValidateXML extends DefaultHandler  {

 /**
  * @param args
  */
 
 static List<String> emps=new ArrayList<String>();
public static StringBuffer buffer=new StringBuffer();


 public static void main(String[] args) 
 {
  
  
  try {
   SAXParserFactory factory=SAXParserFactory.newInstance();
   
   SAXParser parser=factory.newSAXParser();
    File file=new File("C:/Users/Raj/Java Program/Parsers/DOM/employees.xml");

   
     parser.parse(file, new ValidateXML());
    
     
     //System.out.println(buffer);
    /* System.out.println("the no. of emps are :::: "+emps.size());
   for(int i=0;i<emps.size();i++)
    System.out.println("EMP"+i+"n"+emps.get(i));*/
  }
   catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
  
  catch (ParserConfigurationException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (SAXException e) {
   System.out.println("XML is not well formed");
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  
  
  
  
 }

  public void startElement(String uri, String localName, String qName,
   Attributes attributes) throws SAXException 
   {
  
  //System.out.println("name start tag has to be displayed");
  buffer.append("<"); 
   System.out.println("Start element qname ==== "+qName);
   //System.out.println("uri===="+uri);
   //System.out.println("local name===="+localName);
  buffer.append(qName);
   buffer.append(">"); 
   //System.out.println("Inside start Element::::"+qName);
  
   
   
   }
 
  
   public void endElement(String uri, String localName, String qName)
    throws SAXException 
    {
 
 buffer.append("</"); 
   System.out.println("end element name == "+qName);
 buffer.append(qName);
   buffer.append(">"); 
   
   /*if(buffer.toString().contains("<Personnel>"))
    buffer.toString().replace("<Personnel>", " ");
   if(buffer.toString().contains("</Personnel>"))
    buffer.toString().replace("</Personnel>", " ");*/
   /*if(qName.equalsIgnoreCase("employee")){
   emps.add(buffer);
   buffer.delete(0, buffer.length());
   }*/
   //
   //System.out.println(buffer);
 
    }
  
   
   @Override
   public void characters(char[] ch, int start, int length)
     throws SAXException 
     {
    //System.out.println("The string is ::::"+new String(ch,start,length));
    
   buffer.append(new String(ch,start,length).replaceAll("&", "&amp;").trim());  
 
   
   
     }
   
}