java定时器

//定时器到泄洪时间生成泄洪中预警
LocalDateTime floodTime = startTime.toLocalDateTime();
LocalDateTime now = LocalDateTime.now();
Duration duration = Duration.between(now, floodTime);
long delay = duration.toMillis();
new Timer().schedule(new TimerTask() {
    @Override
    public void run() {
        WarnStages warnStages = new WarnStages();
        warnStages.setWarnType("2");
        String warnContent =
            "根据水库调令，" + resName + "正在泄洪，您所处区域属泄洪影响范围，请您及时撤离到安全区域，并随时注意防范风险。";
        warnStages.setWarnContent(warnContent);
        warnStages.setStartTime(startTime);
        warnStages.setWarnCode(warnCode);
        warnStagesDao.save(warnStages);
    }
}, delay);