Quartz
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Quartz是一个完全由Java编写的开源作业调度框架,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。Quartz允许开发人员根据时间间隔来调度作业。它实现了作业和触发器的多对多的关系,还能把多个作业与不同的触发器关联。
先来看一个简单的Quartz应用,让它每隔5s打印"Hello, Quartz",打印10次。
import java.util.Date;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
public class HelloQuartzJob implements Job {
public void execute(JobExecutionContext context)
throws JobExecutionException {
System.out.println("Hello, Quartz! - executing its JOB at "+
new Date() + " by " + context.getTrigger().getName());
}
}
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
public class HelloQuartzJob implements Job {
public void execute(JobExecutionContext context)
throws JobExecutionException {
System.out.println("Hello, Quartz! - executing its JOB at "+
new Date() + " by " + context.getTrigger().getName());
}
}
import java.sql.Date;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SchedulerFactory;
import org.quartz.SimpleTrigger;
import org.quartz.impl.StdSchedulerFactory;
public class HelloQuartzScheduling {
public static void main(String[] args)throws SchedulerException {
SchedulerFactory schedulerFactory = new StdSchedulerFactory();
Scheduler scheduler = schedulerFactory.getScheduler();
JobDetail jobDetail = new JobDetail("helloQuartzJob",
Scheduler.DEFAULT_GROUP, HelloQuartzJob.class);
SimpleTrigger simpleTrigger = new SimpleTrigger("simpleTrigger",
Scheduler.DEFAULT_GROUP);
simpleTrigger.setStartTime(new Date(System.currentTimeMillis()));
simpleTrigger.setRepeatInterval(5000);
simpleTrigger.setRepeatCount(10);
scheduler.scheduleJob(jobDetail, simpleTrigger);
scheduler.start();
}
}
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SchedulerFactory;
import org.quartz.SimpleTrigger;
import org.quartz.impl.StdSchedulerFactory;
public class HelloQuartzScheduling {
public static void main(String[] args)throws SchedulerException {
SchedulerFactory schedulerFactory = new StdSchedulerFactory();
Scheduler scheduler = schedulerFactory.getScheduler();
JobDetail jobDetail = new JobDetail("helloQuartzJob",
Scheduler.DEFAULT_GROUP, HelloQuartzJob.class);
SimpleTrigger simpleTrigger = new SimpleTrigger("simpleTrigger",
Scheduler.DEFAULT_GROUP);
simpleTrigger.setStartTime(new Date(System.currentTimeMillis()));
simpleTrigger.setRepeatInterval(5000);
simpleTrigger.setRepeatCount(10);
scheduler.scheduleJob(jobDetail, simpleTrigger);
scheduler.start();
}
}
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