CronTrigger 示例 1

项目地址：  

    https://github.com/yuleiqq/quartz_example/tree/master/quartz_study

 SimpleTrigger 示例不再介绍，可以参考前面的博客内容； CronTrigger   在实际当中比SimpleTrigger 使用的更多

下面请看具体的代码示例。

定义一个任务job

package com.example03;

import java.util.Date;

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

/**
 * @author  yulei
 *
 * job 任务，打印当前时间
 */

public class SimpleJob implements Job {

    private static Logger log = LoggerFactory.getLogger(SimpleJob.class);

    public SimpleJob() {
    }


    public void execute(JobExecutionContext context) throws JobExecutionException {

        JobKey jobKey = context.getJobDetail().getKey();
        log.info("SimpleJob says: " + jobKey + " executing at " + new Date());
    }

}

 定义调度器和触发器，如下示例显示了Cron 表达式常用的基本情形 。

package com.example03;

import static org.quartz.CronScheduleBuilder.cronSchedule;
import static org.quartz.JobBuilder.newJob;
import static org.quartz.TriggerBuilder.newTrigger;

import org.quartz.CronTrigger;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerMetaData;
import org.quartz.impl.StdSchedulerFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Date;
import java.util.concurrent.TimeUnit;

/**
 * @author  yulei
 * @date 2020/1/17
 *
 * CronTrigger  定时器示例  ,基本展示了Cron 表达式的所有示例
 */
public class CronTriggerExample {

  public void run() throws Exception {
    Logger log = LoggerFactory.getLogger(CronTriggerExample.class);

    //调度器实例化
    Scheduler sched = StdSchedulerFactory.getDefaultScheduler();


    //任务1:  每20秒运行一次
    JobDetail job = newJob(SimpleJob.class).withIdentity("job1", "group1").build();

    CronTrigger trigger = newTrigger().withIdentity("trigger1", "group1").withSchedule(cronSchedule("0/20 * * * * ?"))
        .build();

    Date ft = sched.scheduleJob(job, trigger);
    log.info(job.getKey() + " has been scheduled to run at: " + ft + " and repeat based on expression: "
             + trigger.getCronExpression());

    //任务2:  每隔1分钟执行一次 ,在当前的执行分钟的15秒开始执行
    job = newJob(SimpleJob.class).withIdentity("job2", "group1").build();

    trigger = newTrigger().withIdentity("trigger2", "group1").withSchedule(cronSchedule("15 0/2 * * * ?")).build();

    ft = sched.scheduleJob(job, trigger);
    log.info(job.getKey() + " has been scheduled to run at: " + ft + " and repeat based on expression: "
             + trigger.getCronExpression());

    //任务3:  是每隔一分钟跑步一次，但只在上午8点到下午5点之间
    job = newJob(SimpleJob.class).withIdentity("job3", "group1").build();

    trigger = newTrigger().withIdentity("trigger3", "group1").withSchedule(cronSchedule("0 0/2 8-17 * * ?")).build();

    ft = sched.scheduleJob(job, trigger);
    log.info(job.getKey() + " has been scheduled to run at: " + ft + " and repeat based on expression: "
             + trigger.getCronExpression());

    //任务4: 每天下的5点到11点之间，每3分钟执行一次
    job = newJob(SimpleJob.class).withIdentity("job4", "group1").build();

    trigger = newTrigger().withIdentity("trigger4", "group1").withSchedule(cronSchedule("0 0/3 17-23 * * ?")).build();

    ft = sched.scheduleJob(job, trigger);
    log.info(job.getKey() + " has been scheduled to run at: " + ft + " and repeat based on expression: "
             + trigger.getCronExpression());

    //任务5:  每个月的第1日和第15日的上午10点执行一次
    job = newJob(SimpleJob.class).withIdentity("job5", "group1").build();

    trigger = newTrigger().withIdentity("trigger5", "group1").withSchedule(cronSchedule("0 0 10am 1,15 * ?")).build();

    ft = sched.scheduleJob(job, trigger);
    log.info(job.getKey() + " has been scheduled to run at: " + ft + " and repeat based on expression: "
             + trigger.getCronExpression());

    // 任务6: 周一到周五的每小时的半点执行，如 8:30, 10:30
    job = newJob(SimpleJob.class).withIdentity("job6", "group1").build();

    trigger = newTrigger().withIdentity("trigger6", "group1").withSchedule(cronSchedule("0,30 * * ? * MON-FRI"))
        .build();

    ft = sched.scheduleJob(job, trigger);
    log.info(job.getKey() + " has been scheduled to run at: " + ft + " and repeat based on expression: "
             + trigger.getCronExpression());

    // job 7 只在周六和周日的每小时半点执行，如 8:30, 10:30
    job = newJob(SimpleJob.class).withIdentity("job7", "group1").build();

    trigger = newTrigger().withIdentity("trigger7", "group1").withSchedule(cronSchedule("0,30 * * ? * SAT,SUN"))
        .build();

    ft = sched.scheduleJob(job, trigger);
    log.info(job.getKey() + " has been scheduled to run at: " + ft + " and repeat based on expression: "
             + trigger.getCronExpression());

    log.info("------- Starting Scheduler ----------------");

    sched.start();

    log.info("------- Started Scheduler -----------------");

    log.info("------- Waiting five minutes... ------------");

    TimeUnit.MINUTES.sleep(5);
    log.info("------- Shutting Down ---------------------");

    sched.shutdown(true);

    log.info("------- Shutdown Complete -----------------");

    //统计当前已执行的任务个数
    SchedulerMetaData metaData = sched.getMetaData();
    log.info("Executed " + metaData.getNumberOfJobsExecuted() + " jobs.");

  }

  public static void main(String[] args) throws Exception {

    CronTriggerExample example = new CronTriggerExample();
    example.run();
  }

}

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