import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
/**
* This Servlet counts and prints the number of visitors.
*
* @author Sofoklis Stouraitis
*
*/
public class CountVisitorsServlet extends HttpServlet {
/*
* The Integer who counts the visitors.
*/
private int visitorsCounter = 0;
/**
* Handles HTTP GET requests.
*
* @param request
* the request object
* @param response
* the response object
*
* @throws IOException
* if an input or output error is detected when the servlet
* handles the GET request
* @throws ServletException
* if the request for the GET could not be handled
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
response.setContentType("text/html; charset=ISO-8859-7");
PrintWriter out = new PrintWriter(response.getWriter(), true);
try {
out.println("<html>");
out.println("<head>");
out.println(" <title>CountVisitorsServlet</title>");
out.println(" <meta http-equiv='Content-Type' content='text/html; charset=windows-1253'>");
out.println("</head>");
out.println(" <bodybgcolor='#FFFF99'>");
out.println(" <h1>CountVisitorsServlet is running...</h1><br>");
out.println("Αυτή την σελίδα την έχουν δει <b>" + ++visitorsCounter
+ "</b> επισκέπτες!<br>");
out.println(" </body>");
out.println("</html>");
} catch (Exception ex) {
out.println("Exception: " + ex.getMessage());
out.println(" </body>");
out.println("</html>");
}
}
}// End of class
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