如何立即执行Java程序，然后按定义的作业执行程序

Question

我试图立即执行java程序，然后按照我在代码中定义的作业(调度器)执行程序，现在我的调度器每天从上午9:00执行到晚上9:00。我该怎么做呢？

下面是我的java代码

public class FirstMainClassJob {
    
    private static Logger log = Logger.getLogger(FirstMainClassJob.class);
    
    static HelperUtl helperUtl = new HelperUtl();
    // Fire between 09AM and 09PM every day
    public static Trigger fireBetween9To9EveryDay() throws ParseException, SchedulerException, IOException {
        
        String jobTime=helperUtl.getProperty("CRON_JOB_TIME");
        
        log.info("Application running time is "+jobTime);

        JobDetail job1 = JobBuilder.newJob(GoogleDriveApiQuickstart.class).withIdentity("fireBetween9To9EveryDay", "group1").build();

        Trigger trigger = TriggerBuilder.newTrigger().withIdentity("fireBetween9To9EveryDay", "group1")
                .withSchedule(CronScheduleBuilder.cronSchedule("0 0 "+jobTime+" * * ?")).build();
        
        

        Scheduler scheduler1 = new StdSchedulerFactory().getScheduler();
        scheduler1.start();
        scheduler1.scheduleJob(job1, trigger);
        return trigger;
    }

    public static void main(String[] args) throws ParseException, SchedulerException, IOException {
        FirstMainClassJob.fireBetween9To9EveryDay();
    }

Answer 1

您可以使用

    Trigger trigger = TriggerBuilder.newTrigger().withIdentity("fireOnceAtStart", "group1")
            .withSchedule(SimpleScheduleBuilder.simpleSchedule().withRepeatCount(1)).build();

在一次启动后执行它。