1）创建Cookie：
Cookie cookie = new CookieString cookieName,String cookieValue);
示例：
Cookie cookie = new Cookie”username”，”zhangsan”);
设置Cookie在客户端的持久化时间：cookie.setMaxAge10*60);
3）设置Cookie的携带路径：
cookie.setPath”/”);
response.addCookieCookie cookie);
1．获得Session对象
HttpSession session = request.getSession);
session.setAttributeString name,Object obj);
session.getAttributeString name);
session.removeAttributeString name);