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！
Demo代码下载地址：quartz_demo

<!-- 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
要测试RAMdemo的代码，请先删除demo中这个quartz.properties文件，或者重命名！否则会测试不成功！
（1）：Job

package com.dufy.learn;

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 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.dufy.learn;

import java.util.Date;

import org.quartz.CronScheduleBuilder;
import org.quartz.JobBuilder;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SchedulerFactory;
import org.quartz.SimpleScheduleBuilder;
import org.quartz.Trigger;
import org.quartz.TriggerBuilder;
import org.quartz.impl.StdSchedulerFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

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

    private static Logger _log = LoggerFactory.getLogger(RAMQuartz.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：

CronScheduleBuilder：

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quartz_demo里面有，需要的请在里面下载！
运行 tables_db2_v8.sql 这个文件。

#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.dufy.jdbctest;

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

    @Override
    public void execute(JobExecutionContext context)throws JobExecutionException {
        log.info("MyJob  is start ..................");
        
        log.info("Hello quzrtz  "+
                new SimpleDateFormat("yyyy-MM-dd HH:mm:ss ").format(new Date()));
        
        log.info("MyJob  is end .....................");
    }
    
    

}

（2）QuartzJdbcTest

package com.dufy.jdbctest;

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();

        }
    }
}

运行结果：

控制台打印：

Cron和Simple类型，Simple类型的如果JobDetail没有设置.storeDurably(true)，则job在运行完成之后会在数据库中删除！

转自http://www.cnblogs.com/aflyun/p/6515824.html