Spring Schedule Task动态改写Cron配置方式

@SpringBootApplication
@EnableScheduling
public class SchedulingTasksApplication {
 public static void main(String[] args) {
  SpringApplication.run(SchedulingTasksApplication.class);
 }
}

public class ScheduleTaskSimpleJob {
    @Scheduled(cron = "0 15 10 * * ?")
    public void scheduleCronTask() {    
        long now = System.currentTimeMillis() / 1000;
        System.out.println(
        "schedule tasks using cron jobs - " + now);
    }
}

Implements SchedulinGConfigurer就可以，想怎么改怎么改。
public class ScheduleTaskSimpleJob implements SchedulingConfigurer {    
    public void scheduleCronTask() {    
        long now = System.currentTimeMillis() / 1000;
        System.out.println(
        "schedule tasks using cron jobs - " + now);
    }
    @Override
 public void configureTasks(ScheduledTaskReGIStrar taskRegistrar) {
  taskRegistrar.addTriggerTask(new Runnable() {
   @Override
   public void run() {
    scheduleCronTask();
   }
  }, new Trigger() {
   @Override
   public Date nextExecutionTime(TriggerContext triggerContext) {
    //TODO 将时间配置10：15转换为cron
    String cron = "0 15 10 * * ?";       
    CronTrigger trigger = new CronTrigger(cron);    
    Date nextExecDate = trigger.nextExecutionTime(triggerContext);
    return nextExecDate;
   }
  });  
 }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="Http://www.springframework.org/schema/beans"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns:task="http://www.springframework.org/schema/task"
 xmlns:context="http://www.springframework.org/schema/context"
 xsi:schemaLocation="
  http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd 
  http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd 
  http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd ">
 
 <context:component-scan base-package="com.pes_soft.task.demo" />
 
 <!-- Spring注解方式配置调度任务 -->
 <task:executor id="executor" pool-size="3"/>
 <task:scheduler id="scheduler" pool-size="3"/>
 <task:annotation-driven executor="executor" scheduler="scheduler"/>
</beans>

package com.pes_soft.task.demo; 
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Lazy;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
 
@Lazy(false)
@Component
public class SpringStaticCronTask {
 private static final Logger logger = LoggerFactory.getLogger(SpringStaticCronTask.class);
 
 @Scheduled(cron="0/5 * * * * ?")
 public void staticCronTask() {
  logger.debug("staticCronTask is running...");
        }
}

package com.pes_soft.task.demo; 
import java.util.Date; 
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Lazy;
import org.springframework.scheduling.Trigger;
import org.springframework.scheduling.TriggerContext;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.SchedulingConfigurer;
import org.springframework.scheduling.config.ScheduledTaskRegistrar;
import org.springframework.scheduling.support.CronTrigger;
import org.springframework.stereotype.Component;
 
@Lazy(false)
@Component
@EnableScheduling
public class SpringDynamicCronTask implements SchedulingConfigurer {
 private static final Logger logger = LoggerFactory.getLogger(SpringDynamicCronTask.class);
 private static String cron;
 public SpringDynamicCronTask() {
 cron = "0/5 * * * * ?";
  
  // 开启新线程模拟外部更改了任务执行周期
  new Thread(new Runnable() {
   @Override
   public void run() {
    try {
     Thread.sleep(15 * 1000);
    } catch (InterruptedException e) {
     e.printStackTrace();
    }
    
    cron = "0/10 * * * * ?";
    System.err.println("cron change to: " + cron);
   }
  }).start();
 }
 
 @Override
 public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
  taskRegistrar.addTriggerTask(new Runnable() {
   @Override
   public void run() {
    // 任务逻辑
    logger.debug("dynamicCronTask is running...");
   }
  }, new Trigger() {
   @Override
   public Date nextExecutionTime(TriggerContext triggerContext) {
    // 任务触发，可修改任务的执行周期
    CronTrigger trigger = new CronTrigger(cron);
                Date nextExec = trigger.nextExecutionTime(triggerContext);
                return nextExec;
   }
  });
 }
}