import java.io.*;
import java.servlet.*;
import java.servlet.http.*;
import sun.server.http.*;
import sun.misc.*;
import java.util.*;

public class JdcExample02 extends HttpServlet
{
  
  //
  // Initialize the servlet and set the html pages. Also
  // @param stub Arguments passed by the servlet loader
  // @return void
  //
  public void init (ServletConfig config) throws ServletException
  {
    super.init(config);
  }

  //
  // Write to servlet response file.
  // @param request The servlet request.
  // @param response The servlet response.
  // @return void.
  //
  public void service (HttpServletRequest request, HttpServletResponse response) 
    throws ServletException, IOException 
  {
    Enumeration names = request.getParameterNames();
    PrintStream out = new PrintStream (response.getOutputStream());
    
    response.setContentType ("text/html");
    out.println("<title>Welcome to the JDC (Servlet Version)</title>");
    out.println("<h1>Welcome to the JDC (Servlet Version)</h1>");
    out.println("<h2>Debug Info</h2>");

    //
    // Iterate over all key-value pairs from form and print
    //
    while ( names.hasMoreElements() )
      {
        String key, value;
        key = (String)names.nextElement();
        value = request.getParameter (key);
        out.println("key: " + key + " value: " + value);
        out.println("<br>");
      }

    //
    // Retrieve key-value pairs by key lookup
    //
    String firstname = request.getParameter ("firstname");
    String lastname = request.getParameter ("lastname");

    out.println("<h2>Greetings</h2>");
    out.println("<br>");
    out.println("Hello " + firstname + " " + lastname + ".");
    out.println("Welcome to the JDC.");

    out.close();
  }

}