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Cookies in Servlet

Last Updated : 26 May, 2026

title: Cookies in Servlet

Servlets JSP63 words4 headingsTables includedExamples included

title: Cookies in Servlet description: Cookies create, read aur delete karna

Browser mein small data store karna. Server set karta hai, browser har request mein bhejta hai.

Cookie Create karna

java exampleWoHoTech

Cookie userCookie = new Cookie("username", "Ram");
userCookie.setMaxAge(60 * 60 * 24 * 7); // 7 days
userCookie.setPath("/");
userCookie.setHttpOnly(true);  // XSS protection
userCookie.setSecure(true);    // HTTPS only
response.addCookie(userCookie);

Cookie Read karna

java exampleWoHoTech

Cookie[] cookies = request.getCookies();
String username = null;
if (cookies != null) {
    for (Cookie c : cookies) {
        if ("username".equals(c.getName())) {
            username = c.getValue();
            break;
        }
    }
}

Cookie Delete karna

java exampleWoHoTech

Cookie toDelete = new Cookie("username", "");
toDelete.setMaxAge(0);
toDelete.setPath("/");
response.addCookie(toDelete);

Cookie vs Session

	Cookie	Session
--	--	--
Storage	Client (browser)	Server
Security	Less secure	More secure
Size	~4KB	Unlimited
Lifetime	Can persist	Ends with browser/timeout

Exam Focus

Revise definitions, diagrams, examples, and short-answer points for Cookies in Servlet.

Interview Use

Prepare one clear explanation, one practical example, and one common mistake for this Java topic.

Search Terms

java, java programming, core java, java master course, java notes, master, course, servlets

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