cron springboot整合定时任务

1.在启动类上添上@EnableScheduling

@EnableScheduling
@EnableTransactionManagement
@EnableDiscoveryClient
@EnableFeignClients    //服务调用
@ComponentScan("com.atguigu")
@SpringBootApplication//取消数据源自动配置
@MapperScan("com.atguigu.staservice.mapper")
public class StaApplication {
    public static void main(String[] args) {
        SpringApplication.run(StaApplication.class, args);
    }
}

2.写一个ScheduleTask类在需要定时执行的方法上加上 @Scheduled 

@Component
public class ScheduleTask {
    @Autowired
    private StatisticsDailyService statisticsDailyService;

    //在每天的凌晨一点，把前一天的数据进行添加
    @Scheduled(cron = "0 0 1 * * ?")
    public void task1() {
        //DateUtil工具类生成前一天时间
        String day = DateUtil.formatDate(DateUtil.addDays(new Date(), -1));
        statisticsDailyService.countRegister(day);
    }


    //每隔5秒执行一次
//    @Scheduled(cron = "0/5 * * * * ?")
//    public void task1() {
//        long l = System.currentTimeMillis();
//        System.out.println("*********++++++++++++*****执行了"+l);
//    }


}

3.在线Cron表达式生成器