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  • 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:

    这里写图片描述

    CronScheduleBuilder:

    这里写图片描述

    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:
    这里写图片描述

    控制台打印:
    这里写图片描述

    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!


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    "不管做什么,只要坚持下去就会看到不一样!在路上,不卑不亢!"

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  • 原文地址:https://www.cnblogs.com/aflyun/p/6515824.html
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