Servlets Java

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("Welcome");
    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);
  }
}