好的,所以我想安排一个任务在每个月的最后一天上午 10:10 运行。我的 cron 表达式是
0 10 10 L * ?
现在的问题是CronSequenceGenerator为“L”值抛出 NumberFormatException。这意味着 Spring 的 CronSequenceGenerator 不支持这种表达式。如何以任何其他方式执行此操作(解决方法)。我不想使用石英或 Spring 的将在新版本中支持这一点。
这是完整的堆栈跟踪:
Exception in thread "main" java.lang.NumberFormatException: For input string: "L"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:492)
at java.lang.Integer.valueOf(Integer.java:582)
at org.springframework.scheduling.support.CronSequenceGenerator.getRange(CronSequenceGenerator.java:324)
at org.springframework.scheduling.support.CronSequenceGenerator.setNumberHits(CronSequenceGenerator.java:297)
at org.springframework.scheduling.support.CronSequenceGenerator.setDays(CronSequenceGenerator.java:275)
at org.springframework.scheduling.support.CronSequenceGenerator.setDaysOfMonth(CronSequenceGenerator.java:266)
at org.springframework.scheduling.support.CronSequenceGenerator.parse(CronSequenceGenerator.java:239)
at org.springframework.scheduling.support.CronSequenceGenerator.<init>(CronSequenceGenerator.java:81)
at org.springframework.scheduling.support.CronTrigger.<init>(CronTrigger.java:54)
at org.springframework.scheduling.support.CronTrigger.<init>(CronTrigger.java:44)
at com.hcdc.coedp.datantar.scheduler.SchedulerUtil.start(SchedulerUtil.java:75)
at com.hcdc.coedp.datantar.scheduler.SchedulerUtil.changeTrigger(SchedulerUtil.java:106)
at com.hcdc.coedp.datantar.scheduler.SchedulingService.scheduleTransfer(SchedulingService.java:70)
at com.hcdc.coedp.datantar.scheduler.Scheduler.schedule(Scheduler.java:107)
at main.Main.main(Main.java:47)
更新:
以下是我的调度方法
/**
* Schedule a task {@link Task} with a specified cron expression.
* @param task {@link Task}
* @param cronExpression cron expression to be applied must be a vaild one.
* @param taskName
* @return
*/
public String start(Task task, String cronExpression, String taskName) {
CronTrigger trigger = new CronTrigger(cronExpression);//line 2
CronSequenceGenerator generator = new CronSequenceGenerator(cronExpression, TimeZone.getTimeZone("GMT+5:30"));
List<Date> dateList = new ArrayList<>(5);
Date currentDate = new Date();
for (int i = 0; i < 5; i++) {
currentDate = generator.next(currentDate);
dateList.add((currentDate));
System.out.println("Next Exceution times are" + currentDate);
}
ScheduledFuture sf = tps.schedule(task, trigger);
//TODO Save this scheduled future with a specific task name.
ContextHolder.schduledFutureMap.put(taskName, sf);
return cronExpression;
}
在第 2 行,当我传递指定的 cron 表达式时,它会抛出 NumberFormatException。