注解式Schedule配置定时任务

@Component
public class ScheduledTasks {
    @Autowired
    private ActivityService activityService;
//    1000即1s
    @Scheduled(fixedRate = 1000)
    public void reportCurrentTime() {
        System.out.println("当前时间: " + DateUtil.getNow());
        log.info("打印当前时间: {}.", DateUtil.getNow());
    }

    /*每天四点更新一次*/
    @Scheduled(cron = "0 0 4 * * ? ")
    public void updateRankLIstToRedis() {
        /* redis超时设置 expire多次设置会覆盖 */
        List<RankInfoDTO> list = activityService.countRankList(ACTIVITY_WEB);
    }
}