@Service
public class ScheduledTaskService {
    private static final SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");

    @Scheduled(fixedRate = 5000)
    public void reportCurrentTime() {
        System.out.println("每隔5秒執行一次 " + dateFormat.format(new Date()));
    }

    @Scheduled
 
(cron = "0 23 9 ? * * ")
    public void fixTimeExecution() {
        System.out.println("在指定時間 " + dateFormat.format(new Date()) + "執行");
    }
}

@Configuration
@ComponentScan("ch3.taskscheduler")
@EnableScheduling
public class TaskSchedulerConfig {

}

public class Main {
    public static void main
 
(String[] args) {
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(TaskSchedulerConfig.class);
    }
}