我在SetUp里面初始化添加了一个定时任务到SysTask中，但是启动的时候，SysTask类中的Dao注入为空，求解

初始化添加的任务

if (i == 0){
            //在这里添加后台更新的任务，直接后台更新，前台不可见
            //定时任务示例
            Sys_task task = new Sys_task();
            task.setDisabled(true);
            task.setName("后台更新");
            task.setJobClass("cn.ikeeper.modules.task.sys.UpdateToDB");
            task.setCron("0 */1 * * * ?"); //每隔一分钟执行一次
            task.setData("{\"Job\":\"update to DB\"}");
            task.setNote("UpdateToDB");
            dao.insert(task);
        }

任务类

@IocBean
public class UpdateToDB extends SysTask {
    private static final Log log = Logs.getLog(UpdateToDB.class);

    @Inject
    private Dao dao;
    @Inject
    private TbDevInstService tbDevInstService;
    @Inject
    private TbWdkzqExtService tbWdkzqExtService;
    @Inject
    private TbIotTaskService tbIotTaskService;
    @Override
    public void execute(Sys_task task, JobDataMap data) throws JobExecutionException {
        log.debug("这是后台定时任务，用来更新数据库表的");
        Sql sql = Sqls.create("SELECT wd.id FROM tb_wdkzq_ext wd, tb_iot_task iot WHERE wd.id=iot.instId AND iot.actionCode='readMeterInfo' AND iot.opAt - wd.readAt >= 60");
        dao.execute(sql);
        List<Integer> ids = sql.getList(Integer.class);

        //List<Tb_wdkzq_ext> wdkzqExts = tbWdkzqExtService.query(Cnd.where("id","in", ids));

        List<Tb_iot_task> iotTasks = tbIotTaskService.query(Cnd.where("instId","in", ids));

        int i = 0;
        for (Tb_iot_task iot : iotTasks){
            NutMap map = getJson(iot.getRspjson());
            if (map == null || map.size() == 0){
                continue;
            }
            map.addv("opAt", iot.getOpAt());
            log.debug("输出日志，这里在进行更新操作，第"+i+"次更新");
            updateToDB(iot.getInstid(), map);
            i++;
        }
    }

    //rspJson格式化为NutMap
    private NutMap getJson(String respJson){
        int i1 = respJson.indexOf("Success");
        int i2 = respJson.indexOf("body");
        if (i1 * i2 < 0){
            return null;
        }

        Object body = Mapl.cell(Json.fromJson(respJson), "body");
        return Json.fromJson(NutMap.class, Json.toJson(body));
    }

    private void updateToDB(Integer id, NutMap map){
        Tb_wdkzq_ext wdkzqExt = new Tb_wdkzq_ext();
        wdkzqExt.setId(id);//设置更新的设备id
        wdkzqExt.setAvgt(BigDecimal.valueOf(Double.valueOf(map.getString("avgTempr"))));//设置平均室温
        wdkzqExt.setCurrt(BigDecimal.valueOf(Double.valueOf(map.getString("currTempr"))));//设置当前室温
        wdkzqExt.setSett(BigDecimal.valueOf(Double.valueOf(map.getString("settingTempr"))));//设置设定温度
        wdkzqExt.setSumworktime(Integer.parseInt(map.getString("workTimes")));//设置累计工作时间，单位：分钟
        wdkzqExt.setSumopentime(Integer.parseInt(map.getString("openTapTimes")));//设置累计开阀时间，单位：分钟
        wdkzqExt.setReadat((Date) map.get("opAt"));//设置读取设备的时间
        //更新数据库
        tbWdkzqExtService.update(wdkzqExt);
    }
}

继承的SysTask类

public abstract class SysTask implements Job {
    private static final Log log = Logs.get();
    @Inject
    protected Dao dao;

    @Override
    public void execute(JobExecutionContext context) throws JobExecutionException {
        JobDataMap data = context.getJobDetail().getJobDataMap();
        String taskId = context.getJobDetail().getKey().getName();
        log.debug("============================="+data);
        log.debug("-----------------------------"+dao);//此处dao为空
        execute(dao.fetch(Sys_task.class, taskId), data);
        dao.update(Sys_task.class, Chain.make("exeAt", new Date()).add("exeResult", "执行成功"), Cnd.where("id", "=", taskId));
    }

    abstract void execute(Sys_task task, JobDataMap data) throws JobExecutionException;
}

另外，为什么我用GitHub总是等不上，点击登录后跳转到Github登录，然后返回社区之后无论点刷新还是登录，都没反应了