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How to add and retrieve Cookies in JSP and Servlets ?.


A simple web application demonstrating how to add and retrieve cookies in JSP and Servlets

Step 1 : Create index.jsp

Here index.jsp just transfer control / request to cookies.jsp


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<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   "http://www.w3.org/TR/html4/loose.dtd">
<html>
    <head>
        <meta http-equiv="Refresh" content="0; URL=cookies.jsp">
    </head>
    <body>
    </body>
</html>

Step 2 : Create mystyle.css

Here mystyle.css is just for providing style to JSP page. Things will also work without using it.

body {
  font-family: Verdana, Geneva, Arial, helvetica, sans-serif;
  background-color: #FDF4DF; 
  font-size:12px; 
  color:#FFFFFF;
}

td {
  font-family: Verdana, Geneva, Arial, helvetica, sans-serif;
  font-size:12px;
}

th {
  font-family: Verdana, Geneva, Arial, helvetica, sans-serif;
  font-size:12px;
}

.black {
  color: #000000;
  font-weight: bold;
}



Step 3 : Create cookies.jsp


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<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
 pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Adding Cookies</title>
<link href="mystyle.css" rel="stylesheet" type="text/css">
</head>
<body>
 <%@ page import="javax.servlet.http.Cookie;"%>
 <form method="post" action="cookies.jsp">
  <p>&nbsp;</p>
  <p align="center" class="black">Enter cookie name and cookie
   value.</p>
  <table align="center" bgcolor="#728DCF">
   <tr>
    <td>Cookie Name</td>
    <td><input name=name size=20 class="smalltext"></td>
   </tr>
   <tr>
    <td>Cookie Value</td>
    <td><input name=value size=20 class="smalltext"></td>
   </tr>

   <tr>
    <td colspan="2" align="center"><input type="submit"
     value="Add Cookie" /></td>
   </tr>
  </table>
 </form>
 </td>
 </tr>
 <tr>
  <td>&nbsp;</td>
 </tr>
 </table>

 <%
 // Checks for the value of name that it is null or not
  String name = request.getParameter("name");
  if (name != null && name.length() > 0) {
   String value = request.getParameter("value");
   Cookie retrieveCookies = new Cookie(name, value);
  // add cookies to response object of jsp 
   response.addCookie(retrieveCookies);
  // redirects control to same page for new request
   response.sendRedirect("cookies.jsp");
  }
  
  %>

 <p>&nbsp;</p>
 <p align="center" class="black">Cookies used so far ...</p>
 <table align="center" cellpadding="1" cellspacing="1" border="1"
  bgcolor="#728DCF">
  <tr bgcolor="#000000">
   <td>Cookie Name</td>
   <td>Cookie Value</td>
  </tr>

  <%
  // getCookies() method returns array of Cookie 
  // we iterate over it and extract the name and value
  // into seperate variables cookieName and cookieValue
  Cookie[] cookies = request.getCookies();
  for (int i = 0; i < cookies.length; i++) {
   Cookie cookie = cookies[i];
   String cookieName = cookie.getName();
   String cookieValue = cookie.getValue();
  // display each value on jsp by iterating one by one 
  %>
  <tr>
   <td><%=cookieName%></td>
   <td><%=cookieValue %></td>
  </tr>

  <%
  }
 %>
 </table>
</body>
</html>

Output of the program :

1. Run index.jsp to see the following output :



















2. Add some Cookies name and values and submit : 




















 3. After adding few Cookies , on each submit you get to retrieve Cookies below :




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