method of sending cookies from a servlet in Java
Posted On August 30, 2008 by Bindu Badri Language:
HTTP is a stateless protocol, which makes tracking user actions difficult. One solution is to use a cookie, which is a small piece of data sent by a web browser every time it requests a page from a particular site. Servlets, and CGI scripts, can send cookies when a HTTP request is made - though as always, there is no guarantee the browser will accept it.
Cookies are represented by the javax.servlet.http.Cookie class. Cookie has a single constructor, which takes two strings (a key and a value).
// Create a new cookie
Cookie cookie = new Cookie ("counter", "1");
Adding a cookie to a browser is easy. Cookies are sent as part of a HTTPServletResponse, using the addCookie(Cookie) method. You can call this method multiple times, but remember that most browsers impose a limit of ten cookies, and 4096 bytes of data per hostname.
public void doGet (HttpServletRequest request, HttpServletResponse response)
response.addCookie(new Cookie("cookie_name", "cookie_value"));}