Scheduler作业调度

Scheduler在quartz中负责调度作业的，用来绑定trigger和jobdetail。
用法如下：

public class TestHelloJob {
    public static void main(String[] args) throws SchedulerException, InterruptedException {
        SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println("current time : " + sf.format(new Date()));;

        /* 创建JobDetail实例，并与HelloJob绑定；Job的名字是myjob，隶属于job_group组 */
        JobDetail jobDetail = JobBuilder.newJob(HelloJob.class).withIdentity("myjob1", "job_group1").build();

        CronTrigger trigger = (CronTrigger)TriggerBuilder.newTrigger()
                .withIdentity("mytriggrt1", "mygroup1")
                .withSchedule(
                        CronScheduleBuilder.cronSchedule("0/3 * * * * ? "))
                .build();

        /* 创建SchedulerFactory实例，把jobDetail与trigger绑定在一起 */
        SchedulerFactory factory = new StdSchedulerFactory();
        Scheduler scheduler = factory.getScheduler();
        scheduler.start();
        scheduler.scheduleJob(jobDetail, trigger);

        Date date = scheduler.scheduleJob(jobDetail, trigger);
        System.out.println("date : " + date);

        Thread.sleep(5000);
        scheduler.standby(); //5秒之后暂停作业执行

        Thread.sleep(10000);
        scheduler.start(); //10秒之后重启作业

        Thread.sleep(20000);
        scheduler.shutdown(); //20秒之后停止作业执行
//      scheduler.shutdown(true); //20秒后，如果作业执行完毕，则停止作业；如果作业未执行完毕，等待作业执行完毕，停止作业
//      scheduler.shutdown(false);//20秒后，即使作业未执行完毕，也停止作业；默认为false


    }
}