cron表達(dá)式是什么：

cron表達(dá)式是一個(gè)字符串，該字符串由6個(gè)空格分為7個(gè)域，每一個(gè)域代表一個(gè)時(shí)間含義。常用語定時(shí)任務(wù)。

cron表達(dá)式每5分鐘一次：

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();

標(biāo)簽： 計(jì)算機(jī)字符串 電腦表達(dá)式 定時(shí)任務(wù)常