Servlet- How to send the file as argument

I am able to compile the below program. But when I open it in explorer I m not able to get the response. Its giving me the error. Actually the program requires the file from the user. I am giving that in the url in the folowing way
http://localhost:8080/examples/servlet/ListManagerServlet?aniketh
Where aniketh is the file which I m providing.
Please help me out with this.
import java.util.Vector;
import java.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class ListManagerServlet extends HttpServlet
private Vector addresses;
private String filename;
public void init(ServletConfig config) throws ServletException
super.init(config);
System.out.println("Before");
filename = config.getInitParameter("addressfile");
if(filename == null)
throw new UnavailableException(this,
"The \"addressfile\" property "+
"must be set to a file name");
try
System.out.println("After");
ObjectInputStream in =
new ObjectInputStream(new FileInputStream(filename));
addresses = (Vector)in.readObject();
in.close();
catch(FileNotFoundException e) { addresses = new Vector(); }
catch(Exception e)
throw new UnavailableException(this,
"Error reading address file: "+e);
protected void doGet(HttpServletRequest req,
HttpServletResponse res)
throws ServletException, IOException
res.setContentType("text/html");
res.setHeader("pragma", "no-cache");
PrintWriter out = res.getWriter();
out.print("<HTML><HEAD><TITLE>List Manager</TITLE></HEAD>");
out.print("<BODY><H3>Members:</H3><UL>");
for(int i=0; i<addresses.size(); i++)
out.print("<LI>" + addresses.elementAt(i));
out.print("</UL><HR><FORM METHOD=POST>");
out.print("Enter your email address: <INPUT TYPE=TEXT NAME=email><BR>");
out.print("<INPUT TYPE=SUBMIT NAME=action VALUE=subscribe>");
out.print("<INPUT TYPE=SUBMIT NAME=action VALUE=unsubscribe>");
out.print("</FORM></BODY></HTML>");
out.close();
protected void doPost(HttpServletRequest req,
HttpServletResponse res)
throws ServletException, IOException
String email = req.getParameter("email");
String msg;
if(email == null)
res.sendError(res.SC_BAD_REQUEST,
"No email address specified.");
return;
if(req.getParameter("action").equals("subscribe"))
if(subscribe(email))
msg = "Address " + email + " has been subscribed.";
else
res.sendError(res.SC_BAD_REQUEST,
"Address " + email + " was already subscribed.");
return;
else
if(unsubscribe(email))
msg = "Address " + email + " has been removed.";
else
res.sendError(res.SC_BAD_REQUEST,
"Address " + email + " was not subscribed.");
return;
res.setContentType("text/html");
res.setHeader("pragma", "no-cache");
PrintWriter out = res.getWriter();
out.print("<HTML><HEAD><TITLE>List Manager</TITLE></HEAD><BODY>");
out.print(msg);
out.print("<HR><A HREF=\"");
out.print(req.getRequestURI());
out.print("\">Show the list</A></BODY></HTML>");
out.close();
public String getServletInfo()
return "ListManagerServlet 1.0 by Stefan Zeiger";
private synchronized boolean subscribe(String email) throws IOException
if(addresses.contains(email)) return false;
addresses.addElement(email);
save();
return true;
private synchronized boolean unsubscribe(String email) throws IOException
if(!addresses.removeElement(email)) return false;
save();
return true;
private void save() throws IOException
ObjectOutputStream out =
new ObjectOutputStream(new FileOutputStream(filename));
out.writeObject(addresses);
out.close();
}

i dont need file from the user. Actually the file -aniketh is the one which contains all the email address who are registered on particular site(for example). So if any user is coming and trying to register then it will check in the the file aniketh and see if the user is existing or not. If yes then it will pop up user exist and if no then it will create a subscribe the user. I hope you got wht i am saying. Now I want that my servlet should use that file. SO my question is how to make my servlet use that file. DO i have to passs it in address bar or something else......
Plz reply
appreciate in advance
Message was edited by:
aniketh_parmar

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Servlet- How to send the file as argument

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