如果用于计划注释的属性为空，则使用默认值

Question

I am writing a Spring Batch job and in the Component class I have:

@Scheduled(cron = "${expression.from.property}")
public void runJob() {
        //code
}

This will grab a property from the properties file we have. However, say this property file is missing from the property file, is there a way this can get a default cron expression on top of this?

Answer 1

You should be able to use the Elvis operator to have a default value

@Scheduled(cron = "${expression.from.property ?:1 0 0 0 0 0}") // or whatever cron expression
public void runJob() {
        //code
}