21st Chapter Springboot + Scheduled Tasks

1, Application.properties

#cronjob. EVERYSECOND.CRON=0/1 * * * * * *JOB.EVERYTENSECOND.CRON=0/10 * * * * * *job.everyminute.cron=0 0/1 * * * *job.everyse cond2.cron=* 0/1 * * * *

Note: Cron expressions

• First: Per second
• Second one: every 10 seconds
• The third one: every Minute
• Fourth one: Per second ( Note that this is not per minute )

2, Cronjobtest.java

1  PackageCom.xxx.secondboot.cron;2 3 Importjava.util.Date;4 5 Importorg.apache.commons.lang3.time.DateFormatUtils;6 Importorg.springframework.context.annotation.Configuration;7 Importorg.springframework.scheduling.annotation.Scheduled;8 Importorg.springframework.stereotype.Component;9 Ten /** One * Cron Test A  */ - //@Configuration - @Component the  Public classCronjobtest { -  -     inti = 0; -  +@Scheduled (cron = "${job.everysecond.cron}") -      Public voidEverysecond () { +System.out.println ("First" + (++i) + "call, task per second, current time:" +nowtime ()); A     } at      -     PrivateString Nowtime () { -         returnDateformatutils.format (NewDate (), "Yyyy-mm-dd HH:mm:ss"); -     } -}

3. Application.java (Startup Class)

At this point, start boot and you will notice that the scheduled task is not executed and you need to add an annotation. As follows:

1  PackageCom.xxx.secondboot;2 3 Importorg.springframework.boot.SpringApplication;4 Importorg.springframework.boot.autoconfigure.SpringBootApplication;5 Importorg.springframework.scheduling.annotation.EnableScheduling;6 7 ImportSpringfox.documentation.swagger2.annotations.EnableSwagger2;8 9 @SpringBootApplicationTen @EnableSwagger2 One @EnableScheduling A  Public classApplication { -      Public Static voidMain (string[] args) { -Springapplication.run (Application.class, args); the     } -}

Note: Be sure to add @enablescheduling on the Startup class to start the scheduled task , otherwise the scheduled task will not work!!!

Test:

Start the service and view the console output!!!

21st Chapter Springboot + Scheduled Tasks