CounterRewrite.java Source code

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Here is the source code for CounterRewrite.java

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import java.io.IOException;
import java.io.PrintWriter;

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

public class CounterRewrite extends HttpServlet {
    static final String COUNTER_KEY = "Counter.count";

    public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        HttpSession session = req.getSession(true);
        resp.setContentType("text/html");
        PrintWriter out = resp.getWriter();
        int count = 1;
        Integer i = (Integer) session.getAttribute(COUNTER_KEY);
        if (i != null) {
            count = i.intValue() + 1;
        }
        session.setAttribute(COUNTER_KEY, new Integer(count));
        out.println("<html>");
        out.println("<head>");
        out.println("<title>Session Counter</title>");
        out.println("</head>");
        out.println("<body>");
        out.println("Your session ID is <b>" + session.getId());
        out.println("</b> and you have hit this page <b>" + count + "</b> time(s) during this browser session");

        String url = req.getRequestURI();
        out.println("<form method=GET action=\"" + resp.encodeURL(url) + "\">");
        out.println("<input type=submit " + "value=\"Hit page again\">");
        out.println("</form>");
        out.println("</body>");
        out.println("</html>");
        out.flush();
    }
}