b*g
发帖数: 644 | 1 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).
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