实现quartz定时器及quartz定时器原理介绍

import java.util.Date;

/**
* quartz定时器测试
*
* @author leizhimin 2009-7-23 8:49:01
*/
public class MyJob implements Job {
        public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
                System.out.println(new Date() + ": doing something...");
        }
}

class Test {
        public static void main(String[] args) {
                //1、创建JobDetial对象
                JobDetail jobDetail = new JobDetail();
                //设置工作项
                jobDetail.setJobClass(MyJob.class);
                jobDetail.setName("MyJob_1");
                jobDetail.setGroup("JobGroup_1");

                //2、创建Trigger对象
                SimpleTrigger strigger = new SimpleTrigger();
                strigger.setName("Trigger_1");
                strigger.setGroup("Trigger_Group_1");
                strigger.setStartTime(new Date());
                //设置重复停止时间，并销毁该Trigger对象
                java.util.Calendar c = java.util.Calendar.getInstance();
                c.setTimeInMillis(System.currentTimeMillis() + 1000 * 1L);
                strigger.setEndTime(c.getTime());
                strigger.setFireInstanceId("Trigger_1_id_001");
                //设置重复间隔时间
                strigger.setRepeatInterval(1000 * 1L);
                //设置重复执行次数
                strigger.setRepeatCount(3);

                //3、创建Scheduler对象，并配置JobDetail和Trigger对象
                SchedulerFactory sf = new StdSchedulerFactory();
                Scheduler scheduler = null;
                try {
                        scheduler = sf.getScheduler();
                        scheduler.scheduleJob(jobDetail, strigger);
                        //4、并执行启动、关闭等操作
                        scheduler.start();

                } catch (SchedulerException e) {
                        e.printStackTrace();
                }
//                try {
//                        //关闭调度器
//                        scheduler.shutdown(true);
//                } catch (SchedulerException e) {
//                        e.printStackTrace();
//                }
        }
}