SpringBoot任务调度器的实现代码

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 15:01:02.708 info 34660 --- [ main] bj.scheduler.schedulerapp : started schedulerapp in 3.257 seconds (jvm running for 4.997)