@Scheduled scheduled task details

Spring Of @Scheduled Annotations can handle some simple scheduled tasks , Such as statistical quantity 、 Database backup, etc . The configuration contents and actual examples are as follows ：

rely on

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
        <version>2.7.0</version>
    </dependency>

@EnableScheduling annotation

Add... In the startup class @EnableScheduling Note the timing task

@SpringBootApplication
@EnableScheduling
public class ScheduledApplication {
    public static void main(String[] args) {
        SpringApplication.run(ScheduledApplication.class,args);
    }
}

Configure scheduled tasks

@Component
public class MySchedule {
    @Scheduled(fixedDelay = 1000)
    public void fixedDelay(){
        System.out.println("fixedDelay:"+new Date());
    }
    @Scheduled(fixedRate = 2000)
    public void fixedRate(){
        System.out.println("fixedRate:"+new Date());
    }
    @Scheduled(initialDelay = 1000, fixedRate = 2000)
    public void initialDelay(){
        System.out.println("initialDelay:"+new Date());
    }
    @Scheduled(cron = "0 * * * * ?")
    public void cron(){
        System.out.println("cron:"+new Date());
    }
}

@Scheduled Start a timed task ,fixedDelay =1000, Indicates that the execution of the current task ends 1 Start another task in seconds ;

fixedRate=2000 Indicates that the current task starts execution 2 Start another scheduled task in seconds ,initialDelay=1000 Indicates the delay time of the first execution

Running results （ Console ）