SpringBoot任务调度器的实现代码

小蚂蚁

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 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CodeAE代码之家。
原文链接：https://baijifeilong.github.io/2018/12/12/spring-boot-scheduler/