动态配置Calendar的add方法参数，实现在指定时间提前或者推迟的功能

/**
     * 利用Calendar的add方法来动态设置时间，在指定时间提前或者推迟的功能
     * msgTimeConfig: {1: "y", 2: "M", 5: "d", 10: "h", 12: "m", 13: "s"}
     * msgTimeConfig可以根据Calendar中支持的field自己拓展
     * 
     * @param calendar 日历实例
     * @param timeConfig 类似 -1y2M3d4h5m6s
     */
    private void setCalender(Calendar calendar, String timeConfig) {
        if (Constants.SEND_TIME_DEFAULT.equals(timeConfig)) {
            return;
        }

        boolean isMinusNum = timeConfig.startsWith(StringPool.DASH);
        String finalTimeConfig = (isMinusNum ? timeConfig.substring(1) : timeConfig).trim();
        int baseNum = isMinusNum ? -1 : 1;

        Map<Integer, String> keyIndexMap = msgTimeConfig.values().stream()
                .filter(finalTimeConfig::contains)
                .collect(Collectors.toMap(finalTimeConfig::indexOf, key -> key));
        List<Integer> keyIndexList = keyIndexMap.keySet().stream().sorted().collect(Collectors.toList());
        Function<String, Integer> matchValueFunc = (matchKey) -> {
            int indexOfKeyInConfig = finalTimeConfig.indexOf(matchKey);
            if (indexOfKeyInConfig == -1) {
                return null;
            }

            int indexOfKeyInList = keyIndexList.indexOf(indexOfKeyInConfig);
            int subStartIndex = 0;
            if (indexOfKeyInList > 0) {
                int indexOfPreKeyInConfig = keyIndexList.get(indexOfKeyInList - 1);
                subStartIndex = indexOfPreKeyInConfig + keyIndexMap.get(indexOfPreKeyInConfig).length();
            }
            return Integer.parseInt(finalTimeConfig.substring(subStartIndex, indexOfKeyInConfig));
        };

        msgTimeConfig.forEach((fieldNumber, matchKey) -> {
            Integer timeVal = matchValueFunc.apply(matchKey);
            if (null != timeVal) {
                calendar.add(fieldNumber, timeVal * baseNum);
            }
        });
    }