1. Create a cookie object
Cookie c = new Cookie(String name,String value);
2. Add the cookie to the response response
response.addCookie(cookie);
3. Get an array of all objects in the request cookie composition
Cookie[] cookie = request.getCookie();
4. Remove cookie
There is no direct way to delete cookie
5.cookie common method
Maximum living space 6.setMaxAge () to set a cookie
If you do not set a cookie maximum survival time (not set setMaxAge method), the default cookie is a session-level cookie, cookie default memory stored in the browser, if the browser is closed, along with the release of memory, the cookie will follow destroyed.
If the temporary file sets the maximum living space of the cookie (also set setMaxAge method), the browser cookie will be stored in the form of a file in a folder (that is, on the hard disk), even if multiple switch browsers, not cookie It will be destroyed next time you open the browser before the cookie can still be obtained.