SpringBoot基于数据库的定时任务实现

@Lazy(value = false)
@Component
public class ScheduleTask implements SchedulingConfigurer {
 
    protected static Logger logger = LoggerFactory.getLogger(ScheduleTask.class);
    private SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
 
    @Autowired
    private ScheduleTaskMapper scheduleTaskMapper;
 
    @Override
    public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
        List<ScheduleTask> tasks = getAllScheduleTasks();
        logger.info("【定时任务启动】 启动任务数："+tasks.size()+"; time="+sdf.format(new Date()));
 
        //校验数据
        checkDataList(tasks);
        //通过校验的数据执行定时任务
        int count = 0;
        if(tasks.size()>0) {
            for (int i = 0; i < tasks.size(); i++) {
                try {
                    taskRegistrar.addTriggerTask(getRunnable(tasks.get(i)), getTrigger(tasks.get(i)));
                    count++;
                } catch (Exception e) {
                    logger.error("task start error:" + tasks.get(i).getClassName() + ";" + tasks.get(i).getMethodName() + ";" + e.getMessage());
                }
            }
        }
        logger.info("started task number="+count+"; time="+sdf.format(new Date()));
    };
 
  /**
  * 获取要执行的所有任务
  * @return
  */
    private List<ScheduleTask> getAllScheduleTasks() {
        ScheduleTaskExample example=new ScheduleTaskExample();
        example.createCriteria().andIsDeleteEqualTo((byte) 0);
        return scheduleTaskMapper.selectByExample(example);
    }
  
  /**
  * 获取Runnable
  *
  * @param task
  * @return
  */
    private Runnable getRunnable(ScheduleTask task){
        return new Runnable() {
            @Override
            public void run() {
                try {
                    Object obj = SpringUtil.getBean(task.getClassName());
                    Method method = obj.getClass().getMethod(task.getMethodName(),null);
                    method.invoke(obj);
                } catch (InvocationTargetException e) {
                    logger.error("refect exception:"+task.getClassName()+";"+task.getMethodName()+";"+ e.getMessage());
                } catch (Exception e) {
                    logger.error(e.getMessage());
                }
            }
        };
    }
 
  /**
  * 获取Trigger
  *
  * @param task
  * @return
  */
    private Trigger getTrigger(ScheduleTask task){
        return new Trigger() {
            @Override
            public Date nextExecutionTime(TriggerContext triggerContext) {
                //将Cron 0/1 * * * * ?
                CronTrigger trigger = new CronTrigger(task.getCron());
                Date nextExec = trigger.nextExecutionTime(triggerContext);
                return nextExec;
            }
        };
    }
  
  /**
  * 校验数据
  *
  * @param list
  * @return
  */
    private List<ScheduleTask> checkDataList(List<ScheduleTask> list) {
        String msg="";
        for(int i=0;i<list.size();i++){
            if(!checkOneData(list.get(i)).equalsIgnoreCase("ok")){
                msg+=list.get(i).getTaskName()+";";
                list.remove(list.get(i));
                i--;
            };
        }
        if(!StringUtils.IsEmpty(msg)){
            msg="未启动的任务:"+msg;
            logger.error(msg);
        }
        return list;
    }
 
  /**
  * 按每一条校验数据
  *
  * @param task
  * @return
  */
    private String checkOneData(ScheduleTask task){
        String result="ok";
        Class cal= null;
        try {
            cal = Class.forName(task.getClassName());
            Object obj =SpringUtil.getBean(cal);
            Method method = obj.getClass().getMethod(task.getMethodName(),null);
            String cron=task.getCron();
            if(StringUtils.isBlank(cron)){
                result="no found the cron:"+task.getTaskName();
                logger.error(result);
            }
        } catch (ClassNotFoundException e) {
            result="not found the class:"+task.getClassName()+ e.getMessage();
            logger.error(result);
        } catch (NoSuchMethodException e) {
            result="not found the method:"+task.getClassName()+";"+task.getMethodName()+";"+ e.getMessage();
            logger.error(result);
        } catch (Exception e) {
          logger.error(e.getMessage());
         }
        return result;
    }
}