Quartz(三)CronTrigger(常用)

Cron表达式

用于配置CronTrigger实例,是由7个表达式组成的字符串,描述了时间表的详细信息,格式:[秒] [分] [小时] [日] [月] [周] [年]

代码实例

pom包

<dependency>
    <groupId>org.quartz-scheduler</groupId>
    <artifactId>quartz</artifactId>
    <version>2.2.3</version>
</dependency>

1. HelloJob1

public class HelloJob1 implements Job{
    public void execute(JobExecutionContext context) throws JobExecutionException {
        Date date = new Date();
        SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println("CronJob实例:"+sf.format(date));
    }
}

1. 测试类–每秒执行一次任务

public static void main(String[] args) throws SchedulerException {
        //创建JobDetail实例  将实例与Hellojob绑定
        JobDetail jobDetail = JobBuilder.newJob(HelloJob1.class)
                .withIdentity("jobName1","group1")
                .build();
        //创建一个Trigge实例,定义Job的执行方式
        CronTrigger trig= (CronTrigger) TriggerBuilder
                .newTrigger()
                .withIdentity("myTrigger","group1")
                .startNow()
                .withSchedule(CronScheduleBuilder.cronSchedule("* * * * * ? *"))
                .build();
        //创建Schedule实例
        SchedulerFactory sfact = new StdSchedulerFactory();
        Scheduler scheduler = sfact.getScheduler();
        scheduler.start();
        scheduler.scheduleJob(jobDetail,trig);
        SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println("当前时间:"+sf.format(new Date()));
    }

运行结果：

CronJob实例:2018-08-05 21:16:12
当前时间:2018-08-05 21:16:12
CronJob实例:2018-08-05 21:16:13
CronJob实例:2018-08-05 21:16:14
CronJob实例:2018-08-05 21:16:15
CronJob实例:2018-08-05 21:16:16
CronJob实例:2018-08-05 21:16:17
CronJob实例:2018-08-05 21:16:18
CronJob实例:2018-08-05 21:16:19
CronJob实例:2018-08-05 21:16:20
CronJob实例:2018-08-05 21:16:21
CronJob实例:2018-08-05 21:16:22