code: public final static void addCookie(String name, String value, int maxAgeInSeconds) {
  		addCookie(name, value, maxAgeInSeconds, "/", null);
  	}
docs: 设定返回给客户端的Cookie<br>
  Path: "/"<br>
  No Domain
  
  @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.