Form jsp data are not going to servlet

Hi guys
i got a problem doing my uni assignment. this is an assignment about taking data from a html webpage. then storing the data in a xml document through java servlet. the problem is when i try to pass tha data through servlet it doesnt work. the error message it give is following:
Error: 500
Location: /BookingApp/servlet/BookingProcessServlet
Internal Servlet Error:
java.lang.NullPointerException
     at BookingProcessServlet.generateDOM(BookingProcessServlet.java:119)
     at BookingProcessServlet.doPost(BookingProcessServlet.java:294)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.tomcat.facade.ServletHandler.doService(ServletHandler.java:574)
     at org.apache.tomcat.core.Handler.invoke(Handler.java:322)
     at org.apache.tomcat.core.Handler.service(Handler.java:235)
     at org.apache.tomcat.facade.ServletHandler.service(ServletHandler.java:485)
     at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:917)
     at org.apache.tomcat.core.ContextManager.service(ContextManager.java:833)
     at org.apache.tomcat.modules.server.Http10Interceptor.processConnection(Http10Interceptor.java:176)
     at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:494)
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:516)
     at java.lang.Thread.run(Thread.java:479)
the coding in the corresponding linnes mentioned in the error message i have givan below:
for at BookingProcessServlet.generateDOM(BookingProcessServlet.java:119)
          BookingBean [] bookinglist = (BookingBean []) bookings;
     >>>>     for(int i=0; i<bookinglist.length; i++) >>>> this the line where the error is shown
               if (bookinglist[i] != null)
                    bookingcount++;
               else
                    continue;
for at BookingProcessServlet.doPost(BookingProcessServlet.java:294)
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
     String action = request.getParameter("action");
     if (action != null && action.equals("Back"))
          if(insertBookingToSession(request))
               response.sendRedirect("../jsp/deafault.html");
          else
          response.sendRedirect("../jsp/ListFullError.html");
     else if (action != null && action.equals("Confirm"))
          Document newDOMTree = generateDOM(request);
          generateXMLDocument(newDOMTree);
          HttpSession session = request.getSession(true);
          session.removeAttribute("BookingList ");
          response.sendRedirect("../jsp/confirm.html");
Please this is is urgent. the problem is I am new in JSP and Java Servlet programming. So I dont have any idea what is this problem.
please reply as soon as possible. thank u guys.
waiting for the replies.

hei chk d ff code : this code works i tried dis before i gave it to u
<HTML>
<%@ page import="java.io.*"%>
<%@ page import="java.util.*"%>
<%
if(request.getParameter("submit")!=null){
     String filename="C:/Program Files/Apache Group/Tomcat 4.1/webapps/lbc/xml/test.xml";
     String xmlString = "<xml>";
     Enumeration enums = request.getParameterNames();
     while(enums.hasMoreElements()){
     String tagname= (String) enums.nextElement();
     xmlString = xmlString +"<"+tagname+">";
     xmlString = xmlString +request.getParameter(tagname);
     xmlString = xmlString +"</"+tagname+">";
     System.out.println(xmlString);
     try {
     BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(new File(filename)));
     bos.write(xmlString.getBytes());
     bos.flush();
     bos.close();
     catch (IOException ioe) {
     System.out.println(ioe.toString());
response.sendRedirect("Confirmation.jsp");
%>
<TABLE CELLSPACING="1" CELLPADDING="0" BORDER="0" WIDTH="50%">
<FORM method="post" NAME="test">
     <TR>
     <TD BGCOLOR="#94976E">First Name:</TD>
     <TD><input type="text" name="fname"/></TD>
     </TR>
     <TR>
     <TD BGCOLOR="#94976E">Last Name</TD>
     <TD><input type="text" name="lname"/></TD>
     </TR>
     <TR>
     <TD BGCOLOR="#94976E">Middle Initial</TD>
     <TD><input type="text" name="iname"/></TD>
     </TR>
     <tr>
     <td colspan="2" align="center"><INPUT TYPE="SUBMIT" NAME="submit" VALUE="Send"/></td>
     </tr>
</FORM>
</TABLE>
</HTML>

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