ssm动态修改定时器

@Component
@EnableScheduling
public class updateCronTask implements SchedulingConfigurer {
    public static String cron = "0/2 * * * * ?";
    int i=0;
    @Override
    public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
        taskRegistrar.addTriggerTask(new Runnable() {
        @Override
        public void run(){
        i++;
            // 任务逻辑
        System.out.println("第"+(i)+"次开始执行操作... " +"时间：【" + new SimpleDateFormat("yyyyMMdd hh:mm:ss.SSS").format(new Date()) + "】");
        }
    }, new Trigger(){
        @Override
        public Date nextExecutionTime(TriggerContext triggerContext) {
            //任务触发，可修改任务的执行周期
            CronTrigger trigger = new CronTrigger(cron);
            Date nextExec = trigger.nextExecutionTime(triggerContext);
            return nextExec;
        }
    });
}
}