jsp 底层操作cookie

Response 增加cookie
Cookie c = new Cookie("username", name);
c.setMaxAge(24 * 3600);  //24小时，不设置的话，将会随着浏览器的关闭而自动消失
response.addCookie(c);

Request 访问cookie
Cookie[] cookies = request.getCookies();
for (Cookie c : cookies)
{
  if(c.getName().equals("username))
  {
    out.println(c.getValue());
  }
}