code: public final static void addCookie(String name, String value, int maxAgeInSeconds, String path, String domain) {
  		ServletUtil.addCookie(getServletResponse(), name, value, maxAgeInSeconds, path, domain);
  	}
docs: 设定返回给客户端的Cookie
  
  @param name cookie名
  @param value cookie值
  @param maxAgeInSeconds -1: 关闭浏览器清除Cookie. 0: 立即清除Cookie. n>0 : Cookie存在的秒数.
  @param path Cookie的有效路径
  @param domain the domain name within which this cookie is visible; form is according to RFC 2109