java code for Servlet parameter

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class ShowFile extends HttpServlet {

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

ServletOutputStream out = response.getOutputStream();
String fileName = request.getParameter("file");

out.println("");
out.println("");
out.println("");
out.println("");
out.println("");
out.println("

The File

");
out.println(fileName);
out.println("");
out.println("");
out.close();

}

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