Quartz学习——Quartz简单入门Demo（二）

要学习Quartz框架，首先大概了解了Quartz的基本知识后，在通过简单的例子入门，一步一个脚印的走下去。
下面介绍Quartz入门的示例，由于Quartz的存储方式分为RAM和JDBC，分别对这两种进行简单的说明。并附上代码！
首先需要添加Quartz的Jar包，我使用的是quartz.2.2.1版本！

<!-- quartz -->
    <dependency>
         <groupId>org.quartz-scheduler</groupId>
         <artifactId>quartz</artifactId>
         <version>2.2.1</version>
    </dependency>
    <dependency>
          <groupId>org.quartz-scheduler</groupId>
          <artifactId>quartz-jobs</artifactId>
          <version>2.2.1</version>
    </dependency>

1：RAM方式
1）：Job

package com.test.quartz.job;

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Date;

/**
 * Created by o-zhengzhenhai on 2018/8/17.
 */
public class RAMJob implements Job {

    private static Logger _log = LoggerFactory.getLogger(RAMJob.class);

    @Override
    public void execute(JobExecutionContext arg0) throws JobExecutionException {

        _log.info("Say hello to Quartz" + new Date());
    }

}

2）：QuartzTest

package com.test.quartz.job;

/**
 * Created by o-zhengzhenhai on 2018/8/17.
 */

import org.quartz.*;
import org.quartz.impl.StdSchedulerFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Date;

/**
 * This is a RAM Store Quartz!
 * @author dufy
 * @date 2017.02.04
 *
 */
public class QuartzTest {

    private static Logger _log = LoggerFactory.getLogger(QuartzTest.class);

    public static void main(String[] args) throws SchedulerException {
        //1.创建Scheduler的工厂
        SchedulerFactory sf = new StdSchedulerFactory();
        //2.从工厂中获取调度器实例
        Scheduler scheduler = sf.getScheduler();


        //3.创建JobDetail
        JobDetail jb = JobBuilder.newJob(RAMJob.class)
                .withDescription("this is a ram job") //job的描述
                .withIdentity("ramJob", "ramGroup") //job 的name和group
                .build();

        //任务运行的时间，SimpleSchedle类型触发器有效
        long time=  System.currentTimeMillis() + 3*1000L; //3秒后启动任务
        Date statTime = new Date(time);

        //4.创建Trigger
        //使用SimpleScheduleBuilder或者CronScheduleBuilder
        Trigger t = TriggerBuilder.newTrigger()
                .withDescription("")
                .withIdentity("ramTrigger", "ramTriggerGroup")
                //.withSchedule(SimpleScheduleBuilder.simpleSchedule())
                .startAt(statTime)  //默认当前时间启动
                .withSchedule(CronScheduleBuilder.cronSchedule("0/2 * * * * ?")) //两秒执行一次
                .build();

        //5.注册任务和定时器
        scheduler.scheduleJob(jb, t);

        //6.启动 调度器
        scheduler.start();
        _log.info("启动时间 ： " + new Date());

    }
}

运行结果：
SimpleScheduleBuilder：

从控制台可以看出，该任务2秒钟执行一次

2.JDBC方式

使用jdbc方式，就要配置quartz.properties文件，并且在开始的时候在数据库中新增表！
我使用的数据库是mysql，数据库中表在https://blog.csdn.net/baidu_41669919/article/details/81773822里面有，需要的请在里面复制脚本进行数据库表创建！

#JDBC驱动
org.quartz.dataSource.qzDS.driver:com.mysql.jdbc.Driver
org.quartz.dataSource.qzDS.URL:jdbc:mysql://localhost:3306/quartz_test
org.quartz.dataSource.qzDS.user:root
org.quartz.dataSource.qzDS.password:root
org.quartz.dataSource.qzDS.maxConnection:10

1）MyJob

package com.test.quartz.job;

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

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class MyJdbcJob implements Job{
    private static final Logger log = LoggerFactory.getLogger(MyJob.class);

    @Override
    public void execute(JobExecutionContext context)throws JobExecutionException {
        log.info("MyJdbcJob is start ..................");

        log.info("Hello quzrtz  "+
                new SimpleDateFormat("yyyy-MM-dd HH:mm:ss ").format(new Date()));

        log.info("MyJdbcJob is end .....................");
    }



}

2）QuartzJdbcTest

package com.test.quartz.job;

import java.text.ParseException;
import java.util.List;

import org.quartz.CronScheduleBuilder;
import org.quartz.CronTrigger;
import org.quartz.JobBuilder;
import org.quartz.JobDetail;
import org.quartz.JobKey;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SchedulerFactory;
import org.quartz.SimpleScheduleBuilder;
import org.quartz.SimpleTrigger;
import org.quartz.Trigger;
import org.quartz.TriggerBuilder;
import org.quartz.TriggerKey;
import org.quartz.impl.StdSchedulerFactory;

public class QuartzJdbcTest {

    public static void main(String[] args) throws SchedulerException,
            ParseException {
        startSchedule();
        //resumeJob();
    }
    /**
     * 开始一个simpleSchedule()调度
     */
    public static void startSchedule() {
        try {
            // 1、创建一个JobDetail实例，指定Quartz
            JobDetail jobDetail = JobBuilder.newJob(MyJob.class)
            // 任务执行类
                    .withIdentity("job1_1", "jGroup1")
                    // 任务名，任务组
                    .build();


            //触发器类型
            SimpleScheduleBuilder builder = SimpleScheduleBuilder
                    // 设置执行次数
                    .repeatSecondlyForTotalCount(5);

            //CronScheduleBuilder builder = CronScheduleBuilder.cronSchedule("0/2 * * * * ?");
            // 2、创建Trigger
            Trigger trigger = TriggerBuilder.newTrigger()
                    .withIdentity("trigger1_1", "tGroup1").startNow()
                    .withSchedule(builder)
                    .build();

            // 3、创建Scheduler
            Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();
            scheduler.start();
            // 4、调度执行
            scheduler.scheduleJob(jobDetail, trigger);
            try {
                Thread.sleep(60000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

            //关闭调度器
            scheduler.shutdown();

        } catch (SchedulerException e) {
            e.printStackTrace();
        }
    }

    /**
     * 从数据库中找到已经存在的job，并重新开户调度
     */
    public static void resumeJob() {
        try {

            SchedulerFactory schedulerFactory = new StdSchedulerFactory();
            Scheduler scheduler = schedulerFactory.getScheduler();
            JobKey jobKey = new JobKey("job1_1", "jGroup1");
            List<? extends Trigger> triggers = scheduler.getTriggersOfJob(jobKey);
            //SELECT TRIGGER_NAME, TRIGGER_GROUP FROM {0}TRIGGERS WHERE SCHED_NAME = {1} AND JOB_NAME = ? AND JOB_GROUP = ?
            // 重新恢复在jGroup1组中，名为job1_1的 job的触发器运行
            if(triggers.size() > 0){
                for (Trigger tg : triggers) {
                    // 根据类型判断
                    if ((tg instanceof CronTrigger) || (tg instanceof SimpleTrigger)) {
                        // 恢复job运行
                        scheduler.resumeJob(jobKey);
                    }
                }
                scheduler.start();
            }

        } catch (Exception e) {
            e.printStackTrace();

        }
    }
}

Quartz学习——Quartz简单入门Demo（二）

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