Quartz-java定时任务案例

简介

完全由java编写的开源作业调度框架
Quartz有两大触发器:SimpleTrigger和CronTrigger
使用CronTrigger要掌握Cron表达式

"30 * * * * ?"          #每半分钟触发任务
"30 10 * * * ?"         #每小时的10分30秒触发任务
"30 10 1 * * ?"         #每天1点10分30秒触发任务
"30 10 1 20 * ?"        #每月20号1点10分30秒触发任务
.......

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Maven

    org.quartz-scheduler
    quartz
    2.2.3


    org.quartz-scheduler
    quartz-jobs
    2.2.3
 

quartz.properties

org.quartz.scheduler.instanceName = MyScheduler
org.quartz.threadPool.threadCount = 3
org.quartz.jobStore.class = org.quartz.simpl.RAMJobStore

HelloJob.java

public class HelloJob implements Job {

    public void execute(JobExecutionContext arg0) throws JobExecutionException {
        System.out.println("HelloJob...."+new Date());
    }
    
}

QuartzTest

    public static void main(String[] args) throws InterruptedException {
        Scheduler scheduler;
        try {
            scheduler = StdSchedulerFactory.getDefaultScheduler();
            System.out.println("quartz start....");
            scheduler.start();
            /**********************doWork() start**************/
            //每五秒执行一次
            JobDetail jobDetail = JobBuilder.newJob(HelloJob.class).withIdentity("job1","group1").build();
            SimpleScheduleBuilder simpleScheduleBuilder = SimpleScheduleBuilder.simpleSchedule().withIntervalInSeconds(5).repeatForever();
            Trigger trigger = TriggerBuilder.newTrigger().withIdentity("trigger1", "group1").startNow().withSchedule(simpleScheduleBuilder).build();
            scheduler.scheduleJob(jobDetail, trigger);
            TimeUnit.MINUTES.sleep(1);
            /**********************doWork() end**************/
            System.out.println("quartz shutdown....");
            scheduler.shutdown();
        } catch (SchedulerException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
    }

参考

官网quick-start
官网cookbook
【Quartz】Quartz的搭建、应用（单独使用Quartz）
Quartz-v1.8.6
Quartz cron表达式格式