Java中创建，获取和删除cookie

Cookie cookie = new Cookie("Cookie",value);//创建名为Cookie的cookie设置参数  
              cookie.setMaxAge(30*24*60*60); //设置有效时间30天
              cookie.setPath(request.getContextPath());  // 设置cookie有效路径
              response.addCookie(cookie);

Cookie cookies[] = request.getCookies();
        Cookie nowCookie = null;
        for (Cookie cookie : cookies) {
            if (cookie.getName().equals("Cookie")) { 
                nowCookie = cookie;
            }
        }
String cookie=nowCookie.getValue();

Cookie cookie = new Cookie("Cookie",null);//cookie名字要相同
       　　　  cookie.setMaxAge(0); //
              cookie.setPath(request.getContextPath());  // 相同路径
              response.addCookie(cookie);