code: public static void addCookie(
  		HttpServletRequest request,
  		HttpServletResponse response,
  		String cookieName,
  		String value,
  		String comment,
  		int maxAge,
  		boolean secure,
  		boolean contextOnlyPath
  	) {
  		Cookie newCookie = new Cookie(cookieName, value);
  		if(comment!=null) newCookie.setComment(comment);
  		newCookie.setMaxAge(maxAge);
  		newCookie.setSecure(secure && request.isSecure());
  		String path;
  		if(contextOnlyPath) {
  			path = request.getContextPath() + "/";
  			//if(path.length()==0) path = "/";
  		} else {
  			path = "/";
  		}
  		newCookie.setPath(path);
  		response.addCookie(newCookie);
  	}
docs: Adds a cookie.