problem in removing spaces in xml file

[ksmadhuri]

hi,
in my project i need to develop xml file..i created...im facing problem in deletion of white spaces in xml file..the deletion is working fine..but after deleting the elements it is showing white spaces..but i need to delete that white spaces...can anyone provide me how to do...here is my code...

package proj;

import java.io.*;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Properties;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.w3c.dom.*;
import javax.xml.parsers.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;

public class delete extends HttpServlet {

    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        response.setContentType("text/html");
        PrintWriter pw = response.getWriter();
        String packName = request.getParameter("packName");

        try {
            DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
            DocumentBuilder docBuilder = builderFactory.newDocumentBuilder();

            // Creating the path for XML File using Properties
            ServletContext servletContextObj = request.getSession().getServletContext();
            String excelTemplatesPath = servletContextObj.getRealPath("/");
            String filePaths = excelTemplatesPath + File.separator
                    + "config.properties";
            Properties propObj = new Properties();
            propObj.load(new FileInputStream(filePaths));
            String gprsLoginPath = null;
            gprsLoginPath = propObj.getProperty("GPRS_LOGIN_PATH");
            if (gprsLoginPath == null || gprsLoginPath.trim().equals("")) {
                gprsLoginPath = excelTemplatesPath;
            }
            gprsLoginPath += File.separator + "login.xml";
            java.io.File file = new java.io.File(gprsLoginPath);
            Document doc = null;
            if (file.exists()) {
                try {
                    doc = docBuilder.parse(file);
                } catch (Exception ex) {
                    doc = docBuilder.newDocument();
                    Element root = doc.createElement("PACKS");
                    doc.appendChild(root);
                }
            } else {
                doc = docBuilder.newDocument();
                // Creating Root Tag
                Element root = doc.createElement("PACKS");
                doc.appendChild(root);
            }
           delNode(file, doc, packName);
            pw.println("<b>Xml File Deleted Successfully</b>");
        } catch (Exception e) {
            System.out.println(e);
        }
    }
      public static void delNode(java.io.File file, Document parent, String filtervalue)
            throws Exception {
        NodeList nodeList = parent.getElementsByTagName("PACK_NAME");
        for (int i = 0; i < nodeList.getLength(); i++) {
            Node child = nodeList.item(i);
            System.out.println("child " + child.getTextContent());
              if (child.getTextContent() != null && child.getTextContent().trim().equalsIgnoreCase(filtervalue.trim()) && child.getNodeType() == Node.TEXT_NODE) {
                Node packNode = child.getParentNode().getParentNode();
                Node packsNode = parent.getFirstChild();
                packsNode.removeChild(packNode);
                break;
            }
        }
        parent.normalize();
        TransformerFactory factory = TransformerFactory.newInstance();
        Transformer transformer = factory.newTransformer();
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        StringWriter sw = new StringWriter();
        StreamResult result = new StreamResult(sw);
        DOMSource source = new DOMSource(parent);
        transformer.transform(source, result);
        String xmlString = sw.toString();
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(
                new FileOutputStream(file)));
        bw.write(xmlString);
        bw.flush();
        bw.close();
   }
}

its urgent can anyone tell me how to do..waiting for the reply,
madhu.