当我用java运行调度程序时，什么都没有发生

Question

我正在创建一个计划程序，它每周一都会做提醒。我编写了这些代码，但当我用Tomcat服务器运行它时，eclipse的控制台中没有任何响应

每周跑步。java

package Listener;

public class runWeekly {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        new WeeklyReportService();
    }

}

每周报告服务。java

package Listener;

import java.util.Calendar;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

public class WeeklyReportService {
    public WeeklyReportService(){
        this.startScheduler();
    }

    private void startScheduler(){
        Calendar with = Calendar.getInstance();
        Map<Integer, Integer> dayToDelay = new HashMap<Integer, Integer>();
                dayToDelay.put(Calendar.FRIDAY, 2);
                dayToDelay.put(Calendar.SATURDAY, 1);
                dayToDelay.put(Calendar.SUNDAY, 0);
                dayToDelay.put(Calendar.MONDAY, 6);
                dayToDelay.put(Calendar.TUESDAY, 5);
                dayToDelay.put(Calendar.WEDNESDAY, 4);
                dayToDelay.put(Calendar.THURSDAY, 3);
                int dayOfWeek = with.get(Calendar.DAY_OF_WEEK);
                int hour = with.get(Calendar.HOUR_OF_DAY);
                int delayInDays = dayToDelay.get(dayOfWeek);
                int delayInHours = 0;
                if(delayInDays == 6 && hour<12){
                    delayInHours = 12 - hour;
                }else{
                    delayInHours = delayInDays*24+((24-hour)+12);
                }
         ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);            
         scheduler.scheduleAtFixedRate(new WeeklyTask(), delayInHours,
                                       179, TimeUnit.HOURS);
    }
}

每周任务。java

package Listener;

public class WeeklyTask implements Runnable {
    @Override
    public void run() {
        System.out.println("I'm running every monday at 12 pm");
    }
}

它必须在eclipse的控制台上写下我每周一下午12点运行的，但它没有写。 我试着像java应用程序一样运行它，但它也不起作用

Answer 1

你的延迟太大了

让我们计算周四下午12点：

delayInHours = 3*24+((24-12)+12)=96

所以它将在96小时后开始