如何在春季@Scheduled中使用cron表达在每月的第一个星期一解雇工作？ [英] How to fire the job on first monday of month using cron expresssion in spring @Scheduled?

问题描述

现在我有以下声明：

@Scheduled(cron = "0 0 12 ? * MON#1")
protected synchronized void execute() {...}

，它不起作用：

at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-1.5.9.RELEASE.jar:1.5.9.RELEASE]
Caused by: java.lang.IllegalStateException: Encountered invalid @Scheduled method 'execute': For input string: "2#1"
    at org.springframework.scheduling.annotation.ScheduledAnnotationBeanPostProcessor.processScheduled(ScheduledAnnotationBeanPostProcessor.java:461) ~[spring-context-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    at org.springframework.scheduling.annotation.ScheduledAnnotationBeanPostProcessor.postProcessAfterInitialization(ScheduledAnnotationBeanPostProcessor.java:331) ~[spring-context-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:423) ~[spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1633) ~[spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
    ... 19 common frames omitted

请帮忙使其工作

推荐答案

模式是六个单的列表空格分隔的字段：代表

秒，

分钟，

小时，

天，

月，

工作日。

可以将月份和工作日名称作为英语名称的前三个字母。

The pattern is a list of six single space-separated fields: representing
second,
minute,
hour,
day,
month,
weekday.
Month and weekday names can be given as the first three letters of the English names.

一个星期一我n一个月的前7天应该会产生出你想要的东西。

So a Monday in the first 7 days of the month should generate what you are after.

0 0 12 1-7 * MON

https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/scheduling/support/CronSequenceGenerator.html

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