Servlet-Programming/src/ReadCookies.java


// Import required java libraries
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

// Extend HttpServlet class
public class ReadCookies extends HttpServlet {

   /**
    * 
    */
   private static final long serialVersionUID = 1L;

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

      Cookie cookie = null;
      Cookie[] cookies = null;

      // Get an array of Cookies associated with this domain
      cookies = request.getCookies();

      // Set response content type
      response.setContentType("text/html");

      PrintWriter out = response.getWriter();
      String title = "Reading Cookies Example";
      String docType = "<!doctype html public \"-//w3c//dtd html 4.0 " +
            "transitional//en\">\n";

      out.println(docType +
            "<html>\n" +
            "<head><title>" + title + "</title></head>\n" +
            "<body bgcolor = \"#f0f0f0\">\n");

      if (cookies != null) {
         out.println("<h2> Found Cookies Name and Value</h2>");

         for (int i = 0; i < cookies.length; i++) {
            cookie = cookies[i];
            out.print("Name : " + cookie.getName() + ",  ");
            out.print("Value: " + cookie.getValue() + " <br/>");
         }
      } else {
         out.println("<h2>No cookies founds</h2>");
      }
      if (cookies != null) {
         for (int i = cookies.length - 1; i >= 0; i--) {
            cookie = cookies[i];
            if (cookie.getName().contains("first_name")) {
               out.print("Welcome " + cookie.getValue() + " from ");
            }
            if (cookie.getName().contains("campus")) {
               out.print(cookie.getValue() + " campus </br>");
            }
         }
      }
      out.println("<a href=\"http://localhost:8080/Servlet-Programming/DeleteCookies\">"
            + "<button type=\"button\">Delete all cookies</button></a>");
      out.println("</body>");
      out.println("</html>");
   }
}