cron式に従って一致するn回の実行時間を出力する
1245 ワード
自分で使うために素早く見つけることができます.https://www.cnblogs.com/wulm/p/6923545.html
/**
*
* @desc n
* @auth josnow
* @date 2019 2 23 12:16:25
* @param cron
* @return
*/
public static List seeExcuteTime(String cron) throws Exception {
if (null==cron || "".equals(cron)) {
throw new IllegalArgumentException(" ");
}
CronSequenceGenerator cronSequenceGenerator = new CronSequenceGenerator(cron);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
List list = new ArrayList<>(20);
Date nextTimePoint = new Date();
for (int i = 0; i < 500; i++) {
//
nextTimePoint = cronSequenceGenerator.next(nextTimePoint);
list.add(sdf.format(nextTimePoint));
}
return list;
}
public static void main(String[] args) throws Exception {
List list = seeExcuteTime("0 0 0/1 4/1 * ?");
for (int i = 0; i < list.size(); i++) {
System.out.println(i+1+"\t"+list.get(i));
}
}