spring-task定时任务动态配置修改执行时间

因项目需要，几个定时任务需要人为动态设置执行时间，于是乎吧，就查阅相关资料，是可以动态设置的，废话不多说，直接上代码，一目了然。

package com.seckill.quartz;

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;

import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * Created by loup on 2017/11/11.
 */
@Component
@EnableScheduling
public class DynamicScheduledTask implements SchedulingConfigurer {

    //时间表达式  每2秒执行一次
    private String cron = "0/2 * * * * ?";

    private SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

    @Override
    public void configureTasks(ScheduledTaskRegistrar scheduledTaskRegistrar) {
        scheduledTaskRegistrar.addTriggerTask(new Runnable() {
            @Override
            public void run() {
                //任务逻辑
                System.out.println("---------------start-------------------");
                System.out.println("动态修改定时任务参数，时间表达式cron为：" + cron);
                System.out.println("当前时间为：" + sdf.format(new Date()));
                System.out.println("----------------end--------------------");
            }
        }, new Trigger() {
            @Override
            public Date nextExecutionTime(TriggerContext triggerContext) {
                CronTrigger cronTrigger = new CronTrigger(cron);
                Date nextExecDate = cronTrigger.nextExecutionTime(triggerContext);
                return nextExecDate;
            }
        });
    }

    public void setCron(String cron) {
        this.cron = cron;
    }
}

 这个是定时任务调度执行器，采用的是注解的方式。首先要动态配置，要设置为@EnableScheduling，这是确保能够动态，然后实现SchedulingConfigurer，重写configureTasks方法，接下来就是这个的相关spring配置文件，要引入下面这个task，不然识别不了啊，配置文件就是这么简单

http://www.springframework.org/schema/task

接下来就是写测试类，测试可不可行啊

package com.seckill.quartz;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.io.IOException;

/**
 * Created by loup on 2017/11/11.
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration({"classpath*:/conf/spring-quartz.xml"})
public class QuartzTest {

    @Autowired
    private DynamicScheduledTask dynamicScheduledTask;

    @Test
    public void test1(){
        try {
            Thread.sleep(10000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        dynamicScheduledTask.setCron("0/10 * * * * ?");
        try {
            System.in.read();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

运行测试类，查看结果，达到效果，亲测可用