Quartz -第一篇-入门

特点：分布式+集群
设计模式：
　　工厂模式
　　builder模式
　　组件模式
　　链式写法
核心概念：调度器，任务，触发器
 
使用：
　　依赖：
　　 
         <dependency>
            <groupId>org.quartz-scheduler</groupId>
            <artifactId>quartz</artifactId>
            <version>2.2.3</version>
        </dependency>

创建一个实例实现Job接口，实现其中的execute方法，将你要做的任务放到此方法

package quartz.job;

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;

import javax.xml.crypto.Data;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * ClassName: HelloJob<br/>
 * Description: <br/>
 * date: 2019/1/22 11:19 AM<br/>
 *
 * @author chengluchao
 * @since JDK 1.8
 */

public class HelloJob implements Job {

    @Override
    public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
        Date date = new Date();
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println("Current Exec Time Is:" + simpleDateFormat.format(date));
        System.out.println("Hello word!");
    }
}

编写调用类

package quartz.job;

import org.quartz.JobBuilder;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerFactory;
import org.quartz.SimpleScheduleBuilder;
import org.quartz.Trigger;
import org.quartz.TriggerBuilder;
import org.quartz.impl.StdSchedulerFactory;

/**
 * ClassName: HelloScheduler<br/>
 * Description: <br/>
 * date: 2019/1/22 11:23 AM<br/>
 *
 * @author chengluchao
 * @since JDK 1.8
 */

public class HelloScheduler {
    public static void main(String[] args) throws Exception {
        //创建一个JobDetail实例，将HelloJob.class绑定
        JobDetail jobDetail = JobBuilder
                .newJob(HelloJob.class)
                .withIdentity("myJob", "group1")
                .build();
        //创建一个Trigger实例，定义该job立即执行，并且每隔两秒钟重复执行一次，直到永远
        Trigger trigger = TriggerBuilder
                .newTrigger()
                .withIdentity("myTrigger", "group1")
                .startNow()//立即执行
                .withSchedule(
                        SimpleScheduleBuilder
                                .simpleSchedule()
                                .withIntervalInSeconds(2)//两秒一次
                                .repeatForever())//直到永远
                .build();
        //创建Schduler实例
        SchedulerFactory schedulerFactory = new StdSchedulerFactory();
        Scheduler scheduler = schedulerFactory.getScheduler();
        scheduler.start();
        scheduler.scheduleJob(jobDetail, trigger);
    }
}

14:56:17.296 [DefaultQuartzScheduler_QuartzSchedulerThread] DEBUG org.quartz.simpl.PropertySettingJobFactory - Producing instance of Job 'group1.myJob', class="quartz".job.HelloJob
14:56:17.296 [DefaultQuartzScheduler_QuartzSchedulerThread] DEBUG org.quartz.core.QuartzSchedulerThread - batch acquisition of 1 triggers
14:56:17.296 [DefaultQuartzScheduler_Worker-10] DEBUG org.quartz.core.JobRunShell - Calling execute on job group1.myJob
Current Exec Time Is:2019-01-22 14:56:17
Hello word!
14:56:19.295 [DefaultQuartzScheduler_QuartzSchedulerThread] DEBUG org.quartz.simpl.PropertySettingJobFactory - Producing instance of Job 'group1.myJob', class="quartz".job.HelloJob
14:56:19.295 [DefaultQuartzScheduler_QuartzSchedulerThread] DEBUG org.quartz.core.QuartzSchedulerThread - batch acquisition of 1 triggers
14:56:19.295 [DefaultQuartzScheduler_Worker-1] DEBUG org.quartz.core.JobRunShell - Calling execute on job group1.myJob
Current Exec Time Is:2019-01-22 14:56:19
Hello word!
14:56:21.296 [DefaultQuartzScheduler_QuartzSchedulerThread] DEBUG org.quartz.simpl.PropertySettingJobFactory - Producing instance of Job 'group1.myJob', class="quartz".job.HelloJob
14:56:21.296 [DefaultQuartzScheduler_QuartzSchedulerThread] DEBUG org.quartz.core.QuartzSchedulerThread - batch acquisition of 1 triggers
14:56:21.296 [DefaultQuartzScheduler_Worker-2] DEBUG org.quartz.core.JobRunShell - Calling execute on job group1.myJob
Current Exec Time Is:2019-01-22 14:56:21
Hello word!

补充：

jobDetail的重要属性：
　　name
　　group 默认"DEFAULT"
　　jobClass
　　jobDataMap：
　　　　　　在任务调度的时候，jobDataMap可以进行存储一些信息；
 
打印jobDetail的信息
        System.out.println("jobDetail's name : " + jobDetail.getKey().getName());
        System.out.println("jobDetail's gruop : " + jobDetail.getKey().getGroup());
        System.out.println("jobDetail's jobClass : " + jobDetail.getKey().getClass());

jobDataMap的使用：

public class HelloScheduler {
    public static void main(String[] args) throws Exception {
        //创建一个JobDetail实例，将HelloJob.class绑定
        JobDetail jobDetail = JobBuilder
                .newJob(HelloJob.class)
                .withIdentity("myJob")
                .usingJobData("message","hello myJob1")
                .usingJobData("floatJobvalue",3.14f)
                .build();

        //创建一个Trigger实例，定义该job立即执行，并且每隔两秒钟重复执行一次，直到永远
        Trigger trigger = TriggerBuilder
                .newTrigger()
                .withIdentity("myTrigger", "group1")
                .usingJobData("message","hello myTrigger1")
                .usingJobData("doubleJobvalue",885.02)
                .startNow()//立即执行
                .withSchedule(
                        SimpleScheduleBuilder
                                .simpleSchedule()
                                .withIntervalInSeconds(2)//两秒一次
                                .repeatForever())//直到永远
                .build();
        //创建Schduler实例
        SchedulerFactory schedulerFactory = new StdSchedulerFactory();
        Scheduler scheduler = schedulerFactory.getScheduler();
        scheduler.start();
        scheduler.scheduleJob(jobDetail, trigger);
    }
}
public class HelloJob implements Job {

    @Override
    public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
        Date date = new Date();
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println("Current Exec Time Is:" + simpleDateFormat.format(date));
        System.out.println("Hello word!");


        JobKey key = jobExecutionContext.getJobDetail().getKey();
        System.out.println("JobDetailKey : " + key.getName() + "JobDetailValue : " + key.getGroup());
        TriggerKey triggerKey1 = jobExecutionContext.getTrigger().getKey();
        System.out.println("triggerKey1 : " + triggerKey1.getName() + "triggervalue1 : " + triggerKey1.getGroup());


        JobDataMap dataMap = jobExecutionContext.getJobDetail().getJobDataMap();
        JobDataMap tdataMap = jobExecutionContext.getTrigger().getJobDataMap();

        System.out.println(dataMap.get("message"));
        System.out.println(tdataMap.get("message"));


        JobDataMap dataMap2 = jobExecutionContext.getMergedJobDataMap();
        //Trigger会覆盖JobDetail的信息
        System.out.println(dataMap2.get("message"));
        System.out.println(dataMap2.get("message"));


    }

获取jobDataMap的值的方式2：

 在HelloJob类中定义属性，属性名和map中的key一样，加上get/set方法

在HelloJob的类中就可以直接使用

Trigger的方法：
.startAt(date)//首次执行的时间
.endAt(endDate)//最后一次执行的时间
.startNow()//立即执行
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原文地址：https://www.cnblogs.com/chenglc/p/10303960.html