spring动态创建定时任务

@Component("schedulerListener")
public class SchedulerListener implements ApplicationListener
 
   {
    private static final Logger logger = Logger.getLogger(SchedulerListener.class);

    private static ThreadPoolTaskScheduler tts = null;

    @Override
    public void onApplicationEvent(ContextRefreshedEvent event) {
        if (tts == null) {
            tts = new ThreadPoolTaskScheduler();
            tts.initialize();
        }
        tts.schedule(new TestRunnable(), new CronTrigger("0 20 0 * * *"));
    }
}

public class TestRunnable implements Runnable {
    @Override
    public void run() {
        System.out.println("hello");
    }
}