SpringBoot自带了任务调度器，通过注解的方式使用。小编觉得挺不错的，现在分享给大家，也给大家做个参考。一起跟随小编过来看看吧
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 [email protected] 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$278/687399269@6594402a} 2018-12-12 15:01:02.707 INFO 34660 --- [ scheduling-1] bj.scheduler.SchedulerApp : 2018-12-12T15:01:02.707 Hello 2018-12-12 15:01:02.707 INFO 34660 --- [ scheduling-1] bj.scheduler.SchedulerApp : 2018-12-12T15:01:02.707 Hello 2018-12-12 15:01:02.708 INFO 34660 --- [ main] bj.scheduler.SchedulerApp : Started SchedulerApp in 3.257 seconds (JVM running for 4.997) 2018-12-12 15:01:03.004 INFO 346<i style="color:transparent">来源gaodai$ma#com搞$代*码*网</i>60 --- [ 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
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