我是java Quartz调度的新手,一直在尝试从youtube教程中运行一个简单的石英程序。
这是我尝试的代码:
public class drive1 {
public static void main(String[] args) throws SchedulerException {
JobDetail jobDetail = JobBuilder.newJob(Job.class).build();
Trigger trigger = TriggerBuilder.newTrigger().withIdentity("SimpleTrigger").startNow();
Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();
scheduler.start();
scheduler.scheduleJob(jobDetail, trigger);
}
}
这一直给我在第 4 行出现编译错误: Type mismatch: cannot convert from TriggerBuilder<Trigger> to Trigger
所以我尝试在第 4 行显式类型转换: Trigger trigger = (Trigger)TriggerBuilder.newTrigger().withIdentity("SimpleTrigger").startNow();
这消除了编译错误,但现在我收到运行时异常:
Exception in thread "main" java.lang.ClassCastException: org.quartz.TriggerBuilder cannot be cast to org.quartz.Trigger
at sd.moc.drive1.main(drive1.java:18)
有人可以帮我吗?我知道这是一个菜鸟问题,但我对此很陌生。
我相信你需要"构建"触发器。所以你需要改变
Trigger trigger = TriggerBuilder.newTrigger().withIdentity("SimpleTrigger").startNow();
自
Trigger trigger = TriggerBuilder.newTrigger().withIdentity("SimpleTrigger").startNow().build();