Spring boot 动态的配置Scheduling

一：springboot配置静态定时任务

1：pom中添加依赖

2：启动类中加入@EnableScheduling来开启定时任务

3：@Scheduled(cron = "0/10* * * * ?")// 每过10秒执行一次

二： springboot动态配置定时任务：主要动态的配置。

package com.example.demo.config;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import org.springframework.lang.Nullable;

import org.springframework.scheduling.Trigger;

import org.springframework.scheduling.TriggerContext;

import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;

import org.springframework.scheduling.support.CronTrigger;

import org.springframework.stereotype.Component;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.concurrent.ScheduledFuture;

@Component

@Configuration

public class DynamicSchedulingConfig {

@Autowired

    private ThreadPoolTaskSchedulerthreadPoolTaskScheduler;

    @Bean

    public ThreadPoolTaskSchedulerthreadPoolTaskScheduler(){

return new ThreadPoolTaskScheduler();

    }

private ScheduledFuturefuture;

    private Stringcron ="";

    public StringgetCron() {

return cron;

    }

public void setCron(String cron) {

this.cron = cron;

        stopCron();

        future =threadPoolTaskScheduler.schedule(new Runnable() {

@Override

              public void run() {

try {

System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()));

                  }catch (Exception e) {

e.printStackTrace();

                  }

}

}, new Trigger() {

@Nullable

@Override

              public DatenextExecutionTime(TriggerContext triggerContext) {

if("".equals(cron)||cron==null){

return null;

                  }

CronTrigger cronTrigger =new CronTrigger(cron);

                  Date nextExeDate = cronTrigger.nextExecutionTime(triggerContext);

                  return nextExeDate;

              }

});

    }

public void stopCron(){

if(future!=null){

future.cancel(true);

        }

}

}