Cookies

Cookie is a small amount of information sent by a servlet to the web browser, saved by the browser, and later sent back to the server. Cookies value easily identifies a client, so cookies are commonly used for session management.

Servlet sends cookie to browser using addCookie method of HttpServletResponse interface. Cookies can be retrieved from a request by using the getCookies() method of HttpServletRequest interface. The browser is expected to support 20 cookies for each Web server, 300 cookies total, and may limit cookie size to 4 KB each.

 

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