匹配${}中的数据

	//从json对象中取出message
	String message = jsonObject2.getString("message");
	Pattern regex = Pattern.compile("\$\{([^}]*)\}");
	Matcher matcher = regex.matcher(message);
	StringBuilder sb = new StringBuilder();
	if (StringUtils.isNotEmpty(message)) {
		while (matcher.find()) {
			sb.append(matcher.group(1) + ",");
		}
		//删去最后一个逗号
		if (sb.length() > 0) {
		sb.deleteCharAt(sb.length() - 1);
		}
	}
	String notifyParam = sb.toString();