The Servlet Cookie API

To send cookies to the client, a servlet would create one or more cookies with the appropriate names and values via new Cookie(name, value) , set any desired optional attributes via cookie.setXxx  and add the cookies to the response headers via response.addCookie(cookie) . To read incoming cookies, call request.getCookies(), which returns an array of Cookie objects. In most cases, you loop down this array until you find the one whose name (getName) matches the name you have in mind, then call getValue on that Cookie to see the value associated with that name.

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