Spring定时器

Spring 定时器可以使用注解,免去了繁琐的配置.

@Component
@Configurable
@EnableScheduling
public class ScTask{

    @Scheduled(fixedRate = 1000 * 3)
    public void reportCurrentTime(){
        System.out.println ("Scheduling Tasks Examples: The time is now " + dateFormat ().format (new Date ()));
    }

    //每1分钟执行一次
    @Scheduled(cron = "0 */1 *  * * * ")
    public void reportCurrentByCron(){
        System.out.println ("Scheduling Tasks Examples By Cron: The time is now " + dateFormat ().format (new Date ()));
    }

    private SimpleDateFormat dateFormat(){
        return new SimpleDateFormat("HH:mm:ss");
    }
}

@EnableScheduling:标注启动定时任务
@Scheduled:标注启动定时任务
@Scheduled(fixdRate = 1000*3)定时执行