Cron 表达式在该月的最后一天不起作用

我想安排一个任务在每月最后一天上午 10:10 运行。 cron 表达式是0 10 10 L * ?

现在的问题是CronSequenceGenerator正在投掷NumberFormatException为“L”值。这意味着春天的CronSequenceGenerator不支持这种表达方式。但如果我只传递数字，它就可以正常工作。

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)

Spring 5.3 更新

Spring 现在支持以下语法在该月的最后一天运行

@Scheduled(cron = "0 0 0 L * *") // last day of the month at midnight

原答案：

此时间表在每月最后一天上午 10:10 运行：

@Scheduled(cron = "0 10 10 28-31 * ?")
public void doStuffOnLastDayOfMonth() {
    final Calendar c = Calendar.getInstance();
    if (c.get(Calendar.DATE) == c.getActualMaximum(Calendar.DATE)) {
        // do your stuff
    }
}