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
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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测试数据 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
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. ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | ' _| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: 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 |
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原文链接:https://baijifeilong.github.io/2018/12/12/spring-boot-scheduler/
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