Servlet caches when it shouldn't

Question

My Applet is sending my servlet a filename, the servlet the opens the file and send some info back to my applet. Now the problem comes when I want to open another file, the Servlet keeps on opening the first file I opened! The only way I get it to open the right file is by shutting down and restarting tomcat. How can I get around this? If tried putting this code in my applet after I declared the url, but it does nothing:
URLConnection con = url.openConnection();
con.setUseCaches(false);

Answer 1

This is the code for my servlet:
import java.io.*;
import java.io.File;
import java.util.*;
import java.net.*;
import javax.servlet.http.*;
import javax.servlet.*;
import java.util.Vector;
public class TestServlet extends HttpServlet {
     String file;
     String outputFile = "output.txt";
     PrintWriter out;
     Vector v = new Vector();
     String path;
public void doGet(HttpServletRequest req,
          HttpServletResponse res)
          throws ServletException, IOException{
     res.setContentType ("text/plain");
     out = res.getWriter();
     path = getServletContext().getRealPath("WEB-INF/textfiles");
     file = req.getParameter("name");
     readfile();
     for(int i=0; i<v.size(); i++)
     out.print(v.elementAt(i));
out.close();
public void readfile(){
     try{
     FileReader in = new FileReader(path+ File.separator + file);
          int c;
          while ((c = in.read()) != -1){
          char car = (char)c;
          System.out.println(car);
          Character obj = new Character(car);
          v.addElement(obj);
     }//while
     in.close();
     //outfile.close();
     }catch(IOException except){
     }//end catch
}//readfile
And this is how I call it in the applet:
String name = outField.getText();
try {
String host = getCodeBase().getHost();
URL url =
new URL("http://" + host + ":8080/servlet/TestServlet?name=" + name);
URLConnection con = url.openConnection();
con.setUseCaches(false);
BufferedReader in = new BufferedReader(
               new InputStreamReader(url.openStream()));
Anybody know what am I doing wrong?