内容简介：SpringBoot自带了任务调度器，通过注解的方式使用。启用方式: 在配置类上注解文章首发:
SpringBoot自带了任务调度器，通过注解的方式使用。
启用方式: 在配置类上注解 org.springframework.scheduling.annotation.EnableScheduling
Java示例
package bj.scheduler;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.scheduling.annotation.Schedules;
import java.time.LocalDateTime;
/**
* Created by BaiJiFeiLong@gmail.com at 2018/12/12 下午2:51
*/
@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
@EnableScheduling
@Slf4j
public class SchedulerApp {
public static void main(String[] args) throws InterruptedException {
SpringApplication.run(SchedulerApp.class, args);
Thread.currentThread().join();
}
@Schedules({
@Scheduled(fixedRate = 1000),
@Scheduled(fixedDelay = 1001),
@Scheduled(cron = "* * * * * *")
})
public void sayHello() {
log.info("{} Hello", LocalDateTime.now());
}
}
要点
- @EnableScheduling 启用任务调度器
- @Schedules 组合多个调度器。多个调度器全部启用。
- @Scheduled 单个调度器的配置
- fixedRate 固定执行频率(毫秒)，不计执行耗时
- fixedDelay 固定执行延迟(毫秒)，表示距离上次执行完毕的时长
- cron CronTab调度格式，第一位表示秒
控制台输出
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.1.0.RELEASE)
2018-12-12 15:01:00.332 INFO 34660 --- [ main] bj.scheduler.SchedulerApp : Starting SchedulerApp on MacBook-Air-2.local with PID 34660 (/Users/yuchao/temp/java/hellomaven/target/classes started by yuchao in /Users/yuchao/temp/java/hellomaven)
2018-12-12 15:01:00.339 INFO 34660 --- [ main] bj.scheduler.SchedulerApp : No active profile set, falling back to default profiles: default
2018-12-12 15:01:02.395 INFO 34660 --- [ main] o.s.s.c.ThreadPoolTaskScheduler : Initializing ExecutorService 'taskScheduler'
2018-12-12 15:01:02.496 WARN 34660 --- [ main] reactor.netty.tcp.TcpResources : [http] resources will use the default LoopResources: DefaultLoopResources {prefix=reactor-http, daemon=true, selectCount=4, workerCount=4}
2018-12-12 15:01:02.498 WARN 34660 --- [ main] reactor.netty.tcp.TcpResources : [http] resources will use the default ConnectionProvider: PooledConnectionProvider {name=http, poolFactory=reactor.netty.resources.ConnectionProvider$$Lambda$278/687399269@6594402a}
2018-12-12 15:01:02.707 INFO 34660 --- [ scheduling-1] bj.scheduler.SchedulerApp : 2018-12-12T15:01:02.707 Hello
2018-12-12 15:01:02.707 INFO 34660 --- [ scheduling-1] bj.scheduler.SchedulerApp : 2018-12-12T15:01:02.707 Hello
2018-12-12 15:01:02.708 INFO 34660 --- [ main] bj.scheduler.SchedulerApp : Started SchedulerApp in 3.257 seconds (JVM running for 4.997)
2018-12-12 15:01:03.004 INFO 34660 --- [ scheduling-1] bj.scheduler.SchedulerApp : 2018-12-12T15:01:03.004 Hello
2018-12-12 15:01:03.704 INFO 34660 --- [ scheduling-1] bj.scheduler.SchedulerApp : 2018-12-12T15:01:03.704 Hello
2018-12-12 15:01:03.710 INFO 34660 --- [ scheduling-1] bj.scheduler.SchedulerApp : 2018-12-12T15:01:03.710 Hello
2018-12-12 15:01:04.002 INFO 34660 --- [ scheduling-1] bj.scheduler.SchedulerApp : 2018-12-12T15:01:04.002 Hello
2018-12-12 15:01:04.702 INFO 34660 --- [ scheduling-1] bj.scheduler.SchedulerApp : 2018-12-12T15:01:04.702 Hello
2018-12-12 15:01:04.712 INFO 34660 --- [ scheduling-1] bj.scheduler.SchedulerApp : 2018-12-12T15:01:04.712 Hello
2018-12-12 15:01:05.000 INFO 34660 --- [ scheduling-1] bj.scheduler.SchedulerApp : 2018-12-12T15:01:05 Hello
2018-12-12 15:01:05.700 INFO 34660 --- [ scheduling-1] bj.scheduler.SchedulerApp : 2018-12-12T15:01:05.700 Hello
2018-12-12 15:01:05.716 INFO 34660 --- [ scheduling-1] bj.scheduler.SchedulerApp : 2018-12-12T15:01:05.716 Hello
以上所述就是小编给大家介绍的《SpringBoot任务调度器》，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对 码农网 的支持！
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