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.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());
}
}
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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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以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://baijifeilong.github.io/2018/12/12/spring-boot-scheduler/