Token Servlet Example

This example illustrates how to generate random token number bu using servlet.
import java.io.*;

import java.util.Random;

import javax.servlet.http.*;

import javax.servlet.ServletException;



public class TokenServlet extends HttpServlet {

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

        String tokensID = request.getParameter("tokenID");

        response.setContentType("text/html");

        PrintWriter pw = response.getWriter();

        pw.println("<html><head><title>Tokens</title></head><body ");

        pw.println("style=\"fonr-family:verdana;font-size:10pt\">");

        if(tokensID==null) {

            Random rnd = new Random();

            tokensID = Long.toString(rnd.nextLong());

            pw.println("<p>Welcome. A new token " + tokensID + " is now established</p>");

        } else {

            pw.println("Welcome back.. Your token is " + tokensID + ".</p>");

        }

        String requestURLSame = request.getRequestURL().toString()+"?tokens=" +tokensID;

        String requestURLNew = request.getRequestURL().toString();

        pw.println("<p>Click <a href=" + requestURLSame +" > here </a> again to continue browsing with the "+ " same identify. </p>");

        pw.println("<p>Otherwise, click <a href = " + requestURLNew + "> here</a> again to start browsing with a new identify. </p>");

        pw.println("</body></html>");

        pw.close();

    }

}