A simple cookie example in servlet

Here’s a simple Cookie example in Servlet

Java Source

package com.mkyong;
 
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
public class ServletDemo extends HttpServlet{
 
	public void doGet(HttpServletRequest request, HttpServletResponse response)
	throws IOException{
 
		response.setContentType("text/html");
		PrintWriter pw = response.getWriter();
 
		Cookie cookie = new Cookie("url","mkyong dot com");
		cookie.setMaxAge(60*60); //1 hour
		response.addCookie(cookie);
 
		pw.println("Cookies created");
	}
}

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
 
	<display-name>servletdemo</display-name>
 
	<servlet>
		<servlet-name>ServletName</servlet-name>
		<servlet-class>com.mkyong.ServletDemo</servlet-class>
	</servlet>
 
	<servlet-mapping>
		<servlet-name>ServletName</servlet-name>
		<url-pattern>/Demo</url-pattern>
	</servlet-mapping>
 
</web-app>

The above example will create a simple Cookie with a name “url” and value “mkyong dot com”, time to live is one hour, and store in client computer.

Run It

Deploy and execute the servlet in Firefox and you can check the Cookies is created in Firefox.

1. Please check here to study where does FireFox stored the Cookies

2. Please check here to study How to access the Cookies

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