判断cron表达式是否符合当前时间

引入quartz

        <dependency>
            <groupId>org.quartz-schedulergroupId>
            <artifactId>quartzartifactId>
        dependency>

    public void test(@RequestParam("datetime") @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") LocalDateTime datetime) {

        /*
          每五分钟执行一次
          每小时执行一次
          每天执行一次
          每月执行一次
         */
        CronExpression cronMinute = new CronExpression("0 */5 * * * ?");
        CronExpression cronHour = new CronExpression("0 0 */1 * * ?");
        CronExpression cronDay = new CronExpression("0 0 0 */1 * ?");
        CronExpression cronMonth = new CronExpression("0 0 0 1 */1 ?");

        Date date = Date.from(datetime.atZone(ZoneId.systemDefault()).toInstant());


        if (cronMinute.isSatisfiedBy(date)) {
            System.out.println("分钟");
        }
        if (cronHour.isSatisfiedBy(date)) {
            System.out.println("小时");
        }
        if (cronDay.isSatisfiedBy(date)) {
            System.out.println("日");
        }
        if (cronMonth.isSatisfiedBy(date)) {
            System.out.println("月");
        }

        return null;
    }