Springboot 使用Quartz 定时任务框架

使用场景： 定时任务时间需要根据数据表的时间来进行定时任务，而springboot自带的定时任务cron表达式 并不能够动态改变 因此使用
Quartz 定时任务框架 可以快速解决问题 。

SprintBoot 整合 Quartz框架

一，导入依赖

  <!-- quartz依赖 -->
       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-quartz</artifactId>
       </dependency>

二 ，配置类

package com.lancoo.buildingboard.config;



import com.lancoo.buildingboard.quartz.QuartzSchedulerHandle;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SchedulerFactory;
import org.quartz.impl.StdSchedulerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationListener;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.event.ContextRefreshedEvent;

/**
 * @Author:linjunbo
 * @Description:
 * @Date: 2020/1/6 17:18
 */
@Configuration
public class ApplicationStartQuartzJobListener implements ApplicationListener<ContextRefreshedEvent> {
    @Autowired
    private QuartzSchedulerHandle quartzSchedulerHandle;
    /**
     * 初始启动quartz
     */
    @Override
    public void onApplicationEvent(ContextRefreshedEvent contextRefreshedEvent) {
        try {
            quartzSchedulerHandle.startJob();
        } catch (SchedulerException e) {
            e.printStackTrace();
        }


    }
    @Bean
    public Scheduler scheduler() throws SchedulerException {
        SchedulerFactory schedulerFactoryBean = new StdSchedulerFactory();
        return schedulerFactoryBean.getScheduler();
    }
}

三，添加定时任务 实现Job接口

package com.lancoo.buildingboard.quartz;

import com.lancoo.buildingboard.common.DateTimeUnits;
import com.lancoo.buildingboard.entity.db.StudyRoom;
import com.lancoo.buildingboard.mapper.CourseInfoMapper;
import com.lancoo.buildingboard.service.RoomElectricDayService;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.quartz.SchedulerException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.Calendar;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;

/**
 * @Author:linjunbo
 * @Description: Quartz定时框架 业务
 * @Date: 2020/1/6 10:42
 */
@Component
public class SchedulerQuartzJob1 implements Job {
    
    @Override
    public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
        //定时业务
    }

}

4、定时任务处理类

package com.lancoo.buildingboard.quartz;


import com.lancoo.buildingboard.quartz.SchedulerQuartzJob1;
import com.lancoo.buildingboard.quartz.SchedulerQuartzJob2;
import org.quartz.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Component;

import java.util.Date;


/**
 * @Author:linjunbo
 * @Description: Quartz定时框架 业务
 * @Date: 2020/1/6 10:42
 */

@Component
public class QuartzSchedulerHandle {
    // 任务调度
    @Autowired
    private Scheduler scheduler;

    /**
     * 开始执行所有任务
     *
     * @throws SchedulerException
     */
    public void startJob() throws SchedulerException {
        startJob1(scheduler);
        startJob2(scheduler);
        scheduler.start();
    }

   

    /**
     * 获取Job信息
     *
     * @param name
     * @param group
     * @return
     * @throws SchedulerException
     */
    public String getJobInfo(String name, String group) throws SchedulerException {
        TriggerKey triggerKey = new TriggerKey(name, group);
        CronTrigger cronTrigger = (CronTrigger) scheduler.getTrigger(triggerKey);
        return String.format("time:%s,state:%s", cronTrigger.getCronExpression(),
                scheduler.getTriggerState(triggerKey).name());
    }

    /**
     *  获取cron表达式
     * @param name
     * @param group
     * @return
     * @throws SchedulerException
     */
    public String getTime(String name, String group) throws SchedulerException {
        TriggerKey triggerKey = new TriggerKey(name, group);
        CronTrigger cronTrigger = (CronTrigger) scheduler.getTrigger(triggerKey);
        return  cronTrigger.getCronExpression()  ;
    }

    /**
     * 修改某个任务的执行时间
     *
     * @param name
     * @param group
     * @param time
     * @return
     * @throws SchedulerException
     */
    public boolean modifyJob(String name, String group, String time) throws SchedulerException {
        Date date = null;
        TriggerKey triggerKey = new TriggerKey(name, group);
        CronTrigger cronTrigger = (CronTrigger) scheduler.getTrigger(triggerKey);
            String oldTime = cronTrigger.getCronExpression();
        if (!oldTime.equalsIgnoreCase(time)) {
            CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule(time);
            CronTrigger trigger = TriggerBuilder.newTrigger().withIdentity(name, group)
                    .withSchedule(cronScheduleBuilder).build();
            date = scheduler.rescheduleJob(triggerKey, trigger);
        }
        return date != null;
    }

    /**
     * 暂停所有任务
     *
     * @throws SchedulerException
     */
    public void pauseAllJob() throws SchedulerException {
        scheduler.pauseAll();
    }

    /**
     * 暂停某个任务
     *
     * @param name
     * @param group
     * @throws SchedulerException
     */
    public void pauseJob(String name, String group) throws SchedulerException {
        JobKey jobKey = new JobKey(name, group);
        JobDetail jobDetail = scheduler.getJobDetail(jobKey);
        if (jobDetail == null)
            return;
        scheduler.pauseJob(jobKey);
    }

    /**
     * 恢复所有任务
     *
     * @throws SchedulerException
     */
    public void resumeAllJob() throws SchedulerException {
        scheduler.resumeAll();
    }

    /**
     * 恢复某个任务
     *
     * @param name
     * @param group
     * @throws SchedulerException
     */
    public void resumeJob(String name, String group) throws SchedulerException {
        JobKey jobKey = new JobKey(name, group);
        JobDetail jobDetail = scheduler.getJobDetail(jobKey);
        if (jobDetail == null)
            return;
        scheduler.resumeJob(jobKey);
    }

    /**
     * 删除某个任务
     *
     * @param name
     * @param group
     * @throws SchedulerException
     */
    public void deleteJob(String name, String group) throws SchedulerException {
        JobKey jobKey = new JobKey(name, group);
        JobDetail jobDetail = scheduler.getJobDetail(jobKey);
        if (jobDetail == null)
            return;
        scheduler.deleteJob(jobKey);
    }

 /**
     * 动态定时任务
     * @param scheduler
     * @throws SchedulerException
     */
    private void startJob1(Scheduler scheduler) throws SchedulerException {
        String testTime = "0 0 1 * * ?";
        // 通过JobBuilder构建JobDetail实例，JobDetail规定只能是实现Job接口的实例
        // JobDetail 是具体Job实例
        JobDetail jobDetail = JobBuilder.newJob(SchedulerQuartzJob1.class).withIdentity("job", "group").build();
        // 基于表达式构建触发器
        CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule(testTime);
        // CronTrigger表达式触发器 继承于Trigger
        // TriggerBuilder 用于构建触发器实例
        CronTrigger cronTrigger = TriggerBuilder.newTrigger().withIdentity("job", "group")
                .withSchedule(cronScheduleBuilder).build();
        scheduler.scheduleJob(jobDetail, cronTrigger);
    }
    private void startJob2(Scheduler scheduler) throws SchedulerException {
        JobDetail jobDetail = JobBuilder.newJob(SchedulerQuartzJob2.class).withIdentity("job2", "group2").build();
        CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule("0 0 1 * * ?");
        CronTrigger cronTrigger = TriggerBuilder.newTrigger().withIdentity("job2", "group2")
                .withSchedule(cronScheduleBuilder).build();
        scheduler.scheduleJob(jobDetail, cronTrigger);
    }
}

demo 结构图