[英]Nothing happens when I run the scheduler in java
我正在創建一個調度程序,它每周一都會提醒。 我編寫了這些代碼,但是當我使用 Tomcat 服務器運行它時,eclipse 的控制台中沒有任何響應。
runWeekly.java
package Listener;
public class runWeekly {
public static void main(String[] args) {
// TODO Auto-generated method stub
new WeeklyReportService();
}
}
WeeklyReportService.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);
}
}
每周任務.java
package Listener;
public class WeeklyTask implements Runnable {
@Override
public void run() {
System.out.println("I'm running every monday at 12 pm");
}
}
它必須寫下我每周一中午 12 點在 eclipse 的控制台中運行,但它沒有寫。 我嘗試像 java 應用程序一樣運行它,但它也沒有用。
您的 initialDelay 太大。
讓我們數到星期四中午 12 點:
delayInHours = 3*24+((24-12)+12)=96
所以它將在 96 小時后開始
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.