CookieServlet.java Source code

Introduction

Here is the source code for CookieServlet.java
Source

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

public class CookieServlet extends HttpServlet {
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, java.io.IOException {

        Cookie cookie = null;
        Cookie[] cookies = request.getCookies();
        boolean newCookie = false;

        if (cookies != null) {
            for (int i = 0; i < cookies.length; i++) {
                if (cookies[i].getName().equals("mycookie")) {
                    cookie = cookies[i];
                }
            }
        }
        if (cookie == null) {
            newCookie = true;
            int maxAge;
            try {
                maxAge = new Integer(getServletContext().getInitParameter("cookie-age")).intValue();
            } catch (Exception e) {
                maxAge = -1;
            }

            cookie = new Cookie("mycookie", "" + getNextCookieValue());
            cookie.setPath(request.getContextPath());
            cookie.setMaxAge(maxAge);
            response.addCookie(cookie);
        }
        response.setContentType("text/html");
        java.io.PrintWriter out = response.getWriter();

        out.println("<html>");
        out.println("<head>");
        out.println("<title>Cookie info</title>");
        out.println("</head>");
        out.println("<body>");

        out.println("<h2> Information about the cookie named \"mycookie\"</h2>");

        out.println("Cookie value: " + cookie.getValue() + "<br>");
        if (newCookie) {
            out.println("Cookie Max-Age: " + cookie.getMaxAge() + "<br>");
            out.println("Cookie Path: " + cookie.getPath() + "<br>");
        }

        out.println("</body>");
        out.println("</html>");

        out.close();
    }

    private long getNextCookieValue() {
        return new java.util.Date().getTime();

    }

    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, java.io.IOException {

        doGet(request, response);
    }
}