Quartz 是个开源的作业调度框架，为在 Java 应用程序中进行作业调度提供了简单却强大的机制。今天我们就来学习一下它的使用，这里会分篇章对它进行介绍。只是希望能有个人，在我说没事的时候，知道我不是真的没事；能有个人，在我强颜欢笑的时候，知道我不是真的开心。

quartz的使用案例

我的测试环境用的是maven，这次的测试代码是作为一个maven模块编写的(可能引用了父模块的jar依赖)，首先添加quartz的依赖。

org.quartz-scheduler

quartz

2.3.0

项目结构如下：

一、quartz的配置，这个不是必须的但是比较有用

quartz是可以灵活配置的，而最好的方式就是在应用的classpath上创建quartz.properties文件进行配置。详细的配置项，可以参考：http://www.quartz-scheduler.org/documentation/quartz-2.1.x/configuration/。下面的内容是我们本次测试的配置。

# This scheduler’s name will be “MyScheduler”.

org.quartz.scheduler.instanceName=MyScheduler

# There are3 threads in the thread pool, which means that a maximum of 3jobs can be run simultaneously.

org.quartz.threadPool.threadCount= 3# All of Quartz’s data, suchas details of jobs and triggers, is held in memory (rather than ina database)

org.quartz.jobStore.class = org.quartz.simpl.RAMJobStore

二、开始我们的程序的编写

packagecom.linux.huhx.example1;importorg.quartz.Scheduler;importorg.quartz.SchedulerException;importorg.quartz.impl.StdSchedulerFactory;/*** @Author: huhx

* @Date: 2017-11-23 上午 8:59*/

public classQuartzTest {public static voidmain(String[] args) {try{

Scheduler scheduler=StdSchedulerFactory.getDefaultScheduler();

scheduler.start();

scheduler.shutdown();

}catch(SchedulerException e) {

e.printStackTrace();

}

}

}

运行上述的代码，如果已经配置了日志，可以看到如下的控制台输出。

09:23:18.593 [main] INFO org.quartz.impl.StdSchedulerFactory - Using default implementation forThreadExecutor09:23:18.624 [main] INFO o.quartz.core.SchedulerSignalerImpl - Initialized Scheduler Signaller of type: classorg.quartz.core.SchedulerSignalerImpl09:23:18.624 [main] INFO org.quartz.core.QuartzScheduler - Quartz Scheduler v.2.3.0created.09:23:18.640 [main] INFO org.quartz.simpl.RAMJobStore -RAMJobStore initialized.09:23:18.640 [main] INFO org.quartz.core.QuartzScheduler - Scheduler meta-data: Quartz Scheduler (v2.3.0) 'MyScheduler' with instanceId 'NON_CLUSTERED'Schedulerclass: 'org.quartz.core.QuartzScheduler' -running locally.

NOT STARTED.

Currentlyinstandby mode.

Number of jobs executed:0Using thread pool'org.quartz.simpl.SimpleThreadPool' - with 3threads.

Using job-store 'org.quartz.simpl.RAMJobStore' - which does not support persistence. and isnot clustered.09:23:18.640 [main] INFO org.quartz.impl.StdSchedulerFactory - Quartz scheduler 'MyScheduler' initialized from default resource file in Quartz package: 'quartz.properties'

09:23:18.640 [main] INFO org.quartz.impl.StdSchedulerFactory - Quartz scheduler version: 2.3.0

09:23:18.640 [MyScheduler_QuartzSchedulerThread] DEBUG o.quartz.core.QuartzSchedulerThread - batch acquisition of 0triggers09:23:18.640 [main] INFO org.quartz.core.QuartzScheduler -Scheduler MyScheduler_$_NON_CLUSTERED started.09:23:18.640 [main] INFO org.quartz.core.QuartzScheduler -Scheduler MyScheduler_$_NON_CLUSTERED shutting down.09:23:18.640 [main] INFO org.quartz.core.QuartzScheduler -Scheduler MyScheduler_$_NON_CLUSTERED paused.09:23:18.640 [main] DEBUG org.quartz.simpl.SimpleThreadPool -Shutting down threadpool...09:23:18.640 [main] DEBUG org.quartz.simpl.SimpleThreadPool -Shutdown of threadpool complete.09:23:18.640 [main] INFO org.quartz.core.QuartzScheduler -Scheduler MyScheduler_$_NON_CLUSTERED shutdown complete.09:23:19.109 [MyScheduler_Worker-2] DEBUG org.quartz.simpl.SimpleThreadPool - WorkerThread isshut down.09:23:19.109 [MyScheduler_Worker-1] DEBUG org.quartz.simpl.SimpleThreadPool - WorkerThread isshut down.09:23:19.109 [MyScheduler_Worker-3] DEBUG org.quartz.simpl.SimpleThreadPool - WorkerThread is shut down.

需要注意的一点就是：如果我们通过StdSchedulerFactory.getDefaultScheduler()的方式维护一个调度器，我们的应用不会终止直到scheduler.shutdown()方法被调用。下面我们添加一个简单的Hello的任务并加以调度。这里面我们提供QuartzTest完整的代码，我们在调度器开始后，让程序睡眠10秒。这样可以在shutdown之前，可以看到HelloJob的调度执行。

packagecom.linux.huhx.example1;import org.quartz.*;importorg.quartz.impl.StdSchedulerFactory;importjava.util.concurrent.TimeUnit;/*** @Author: huhx

* @Date: 2017-11-23 上午 8:59*/

public classQuartzTest {public static voidmain(String[] args) {try{

Scheduler scheduler=StdSchedulerFactory.getDefaultScheduler();

scheduler.start();//define the job and tie it to our HelloJob class

JobDetail job = JobBuilder.newJob(HelloJob.class)

.withIdentity("job1", "group1")

.build();//每5秒运行一次job

Trigger trigger =TriggerBuilder.newTrigger()

.withIdentity("trigger1", "group1")

.startNow()

.withSchedule(SimpleScheduleBuilder.simpleSchedule()

.withIntervalInSeconds(5)

.repeatForever())

.build();//Tell quartz to schedule the job using our trigger

scheduler.scheduleJob(job, trigger);

TimeUnit.SECONDS.sleep(10);

scheduler.shutdown();

}catch(Exception e) {

e.printStackTrace();

}

}

}

我们的HelloJob的代码比较简单就是输出字符串：hello world.

packagecom.linux.huhx.example1;importorg.quartz.Job;importorg.quartz.JobExecutionContext;importorg.quartz.JobExecutionException;/*** @Author: huhx

* @Date: 2017-11-23 上午 9:02*/

public class HelloJob implementsJob {

@Overridepublic void execute(JobExecutionContext jobExecutionContext) throwsJobExecutionException {

System.out.println("hello world.");

}

}

运行QuartzTest，可以看到如下的日志输出。由于我们的调度器是每5秒执行一次HelloJob，睡眠10秒之后会执行3次。

09:39:50.488 [main] INFO org.quartz.impl.StdSchedulerFactory - Using default implementation forThreadExecutor09:39:50.519 [main] INFO o.quartz.core.SchedulerSignalerImpl - Initialized Scheduler Signaller of type: classorg.quartz.core.SchedulerSignalerImpl09:39:50.519 [main] INFO org.quartz.core.QuartzScheduler - Quartz Scheduler v.2.3.0created.09:39:50.519 [main] INFO org.quartz.simpl.RAMJobStore -RAMJobStore initialized.09:39:50.519 [main] INFO org.quartz.core.QuartzScheduler - Scheduler meta-data: Quartz Scheduler (v2.3.0) 'MyScheduler' with instanceId 'NON_CLUSTERED'Schedulerclass: 'org.quartz.core.QuartzScheduler' -running locally.

NOT STARTED.

Currently in standby mode.

Number of jobs executed:0Using thread pool'org.quartz.simpl.SimpleThreadPool' - with 3threads.

Using job-store 'org.quartz.simpl.RAMJobStore' -which does not support persistence. and is not clustered.09:39:50.519 [main] INFO org.quartz.impl.StdSchedulerFactory - Quartz scheduler 'MyScheduler' initialized from default resource file in Quartz package: 'quartz.properties'

09:39:50.519 [main] INFO org.quartz.impl.StdSchedulerFactory - Quartz scheduler version: 2.3.0

09:39:50.519 [main] INFO org.quartz.core.QuartzScheduler -Scheduler MyScheduler_$_NON_CLUSTERED started.09:39:50.519 [MyScheduler_QuartzSchedulerThread] DEBUG o.quartz.core.QuartzSchedulerThread - batch acquisition of 0triggers09:39:50.535 [MyScheduler_QuartzSchedulerThread] DEBUG o.quartz.core.QuartzSchedulerThread - batch acquisition of 1triggers09:39:50.535 [MyScheduler_QuartzSchedulerThread] DEBUG o.q.simpl.PropertySettingJobFactory - Producing instance of Job 'group1.job1', class=com.linux.huhx.example1.HelloJob09:39:50.551 [MyScheduler_QuartzSchedulerThread] DEBUG o.quartz.core.QuartzSchedulerThread - batch acquisition of 1triggers09:39:50.551 [MyScheduler_Worker-1] DEBUG org.quartz.core.JobRunShell -Calling execute on job group1.job1

hello world.09:39:55.520 [MyScheduler_QuartzSchedulerThread] DEBUG o.q.simpl.PropertySettingJobFactory - Producing instance of Job 'group1.job1', class=com.linux.huhx.example1.HelloJob09:39:55.520 [MyScheduler_QuartzSchedulerThread] DEBUG o.quartz.core.QuartzSchedulerThread - batch acquisition of 1triggers09:39:55.520 [MyScheduler_Worker-2] DEBUG org.quartz.core.JobRunShell -Calling execute on job group1.job1

hello world.09:40:00.521 [MyScheduler_QuartzSchedulerThread] DEBUG o.q.simpl.PropertySettingJobFactory - Producing instance of Job 'group1.job1', class=com.linux.huhx.example1.HelloJob09:40:00.521 [MyScheduler_QuartzSchedulerThread] DEBUG o.quartz.core.QuartzSchedulerThread - batch acquisition of 1triggers09:40:00.521 [MyScheduler_Worker-3] DEBUG org.quartz.core.JobRunShell -Calling execute on job group1.job1

hello world.09:40:00.536 [main] INFO org.quartz.core.QuartzScheduler -Scheduler MyScheduler_$_NON_CLUSTERED shutting down.09:40:00.536 [main] INFO org.quartz.core.QuartzScheduler -Scheduler MyScheduler_$_NON_CLUSTERED paused.09:40:00.536 [main] DEBUG org.quartz.simpl.SimpleThreadPool -Shutting down threadpool...09:40:00.536 [main] DEBUG org.quartz.simpl.SimpleThreadPool -Shutdown of threadpool complete.09:40:00.536 [main] INFO org.quartz.core.QuartzScheduler -Scheduler MyScheduler_$_NON_CLUSTERED shutdown complete.09:40:00.583 [MyScheduler_Worker-2] DEBUG org.quartz.simpl.SimpleThreadPool -WorkerThread is shut down.09:40:00.615 [MyScheduler_Worker-1] DEBUG org.quartz.simpl.SimpleThreadPool -WorkerThread is shut down.09:40:01.021 [MyScheduler_Worker-3] DEBUG org.quartz.simpl.SimpleThreadPool - WorkerThread is shut down.

友情链接