Java 你如何每5分钟执行一次cron作业？
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How do you execute cron job every 5 minutes?
提问by Mhanaz Syed
JobDetail job1 = JobBuilder.newJob(FirstJob.class).withIdentity("job1", "group1").build();
Trigger trigger1 = TriggerBuilder.newTrigger().withIdentity("cronTrigger1", "group1")
.withSchedule(CronScheduleBuilder.cronSchedule("*/10 * * * * ?")).build();
Scheduler scheduler1 = new StdSchedulerFactory().getScheduler();
scheduler1.start();
scheduler1.scheduleJob(job1, trigger1);
JobDetail job2 = JobBuilder.newJob(SecondJob.class).withIdentity("job2", "group2").build();
Trigger trigger2 = TriggerBuilder.newTrigger().withIdentity("cronTrigger2", "group2")
.withSchedule(CronScheduleBuilder.cronSchedule(new CronExpression("0/7 * * * * ?"))).build();
Scheduler scheduler2 = new StdSchedulerFactory().getScheduler();
scheduler2.start();
scheduler2.scheduleJob(job2, trigger2);
Thread.sleep(100000);
scheduler1.shutdown();
scheduler2.shutdown();
I am trying to execute a Cron Job every 5 minutes of an hour but its not executing on time. I think that the time expression is wrong.
我试图每 5 分钟执行一次 Cron 作业，但它没有按时执行。我认为时间表达是错误的。
How do you set the time expression for a 1, 5 minute job and a 2 for 1 hour job?
您如何为 1、5 分钟的工作和 2 的 1 小时工作设置时间表达式？
采纳答案by Ye Win
For job 1, 5 minute, you can use:
对于作业 1, 5 分钟，您可以使用：
*/5 * * * * ?
Because the first field is for minutes. If you specify * in this field, it runs every minutes. If you specify */5 in the 1st field, it runs every 5 minutes as shown above.
因为第一个字段是分钟。如果在此字段中指定 *，它将每分钟运行一次。如果您在第一个字段中指定 */5，则它每 5 分钟运行一次，如上所示。
For job 2, 1 hour, you can use:
对于作业 2、1 小时，您可以使用：
0 */1 * * *
Because the second field is for hours. If you specify * in this field, it runs every hour. If you specify */5 in the 2nd field, it runs every 5 hours as shown above.
因为第二个字段是小时。如果您在此字段中指定 *，它将每小时运行一次。如果您在第二个字段中指定 */5，它将每 5 小时运行一次，如上所示。
Not related with cron but your code seems to be missing to pass expression as to TheLostMind comment.
与 cron 无关，但您的代码似乎缺少传递有关 TheLostMind 评论的表达式。
Correct sentence For job 1:
作业 1 的正确句子：
Trigger trigger1 = TriggerBuilder.newTrigger().withIdentity("cronTrigger1", "group1")
.withSchedule(CronScheduleBuilder.cronSchedule(new CronExpression("*/10 * * * * ?"))).build();
Hope it helps.
希望能帮助到你。
