``` java package com.ae.job; import java.text.SimpleDateFormat; import java.util.Date; import org.quartz.JobBuilder; import org.quartz.JobDetail; import org.quartz.Scheduler; import org.quartz.SchedulerException; import org.quartz.SchedulerFactory; import org.quartz.SimpleScheduleBuilder; import org.quartz.Trigger; import org.quartz.TriggerBuilder; import org.quartz.impl.StdSchedulerFactory; public class HelloScheduler { public static void main(String[] args) { // 創建一個JobDetail實例，將該實例與HelloJob Class綁定 JobDetail jobDetail = JobBuilder.newJob(HelloJob.class) .withIdentity("myJob", "group") .build(); // 輸出JobDetails System.out.println("jobDetail's name: " + jobDetail.getKey().getName()); System.out.println("jobDetail's group: " + jobDetail.getKey().getGroup()); System.out.println("jobDetail's jobClass" + jobDetail.getJobClass().getName()); // 創建一個trigger實例，定義該job立即執行，并且每隔兩秒鐘重復一次，直到永遠 Trigger trigger = TriggerBuilder .newTrigger() .withIdentity("myJob", "group") .startNow() .withSchedule( SimpleScheduleBuilder.simpleSchedule() .withIntervalInSeconds(2) .repeatForever()) .build(); // 創建Scheduler實例 SchedulerFactory sfact = new StdSchedulerFactory(); try { Scheduler scheduler = sfact.getScheduler(); scheduler.start(); // 打印當前的執行時間，格式為2000-00-00 00:00:00 Date date = new Date(); SimpleDateFormat sFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); System.out.println("Current time is: " + sFormat.format(date)); scheduler.scheduleJob(jobDetail, trigger); } catch (SchedulerException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } ```