quartz学习笔记（一）简单入门

前言

quartz是Java编写的一款开源的任务调度开发框架，在项目开发中很多场景都可以用到，比如订单超期自动收货。

所谓程序源于生活，生活中也有很多场景可以用quartz来模拟，比如工作日早上七点起床，再比如，每天八杯水，

隔一小时一杯，在这里我就根据这两个例子来给大家初步介绍quartz。

粗糙类图+流程介绍

1.简要画一下quartz大致结构，画的不好，还望见谅:)

2.使用quartz开发，首先得知道自己的需要去完成的任务，quartz提供一个Job接口，只要实现它的execute()方法即可，然后创建调度工厂拿到调度实例，

设置好触发器，将任务和触发器加入到调度中即可，具体实现请参考后续代码。

编码实现

开发环境

• gradle 4.1
• quartz 2.2.1
• jdk1.7

新建gradle项目

group 'com.haq.quartz'
version '1.0-SNAPSHOT'

apply plugin: 'java'

sourceCompatibility = 1.7

repositories {
    mavenCentral()
}

dependencies {
    compile group: 'org.quartz-scheduler', name: 'quartz', version: '2.2.1'
    compile group: 'org.slf4j', name: 'slf4j-api', version: '1.7.21'
    compile group: 'ch.qos.logback', name: 'logback-core', version: '1.1.7'
    compile group: 'ch.qos.logback', name: 'logback-classic', version: '1.1.7'
    testCompile group: 'junit', name: 'junit', version: '4.12'
}

创建quartz配置文件quartz.properties

 #============================================================================
 #   Scheduler configration
 #============================================================================
 org.quartz.scheduler.instanceName = MyScheduler
 org.quartz.scheduler.instanceId = AUTO

 org.quartz.scheduler.skipUpdateCheck: true

 #============================================================================
 # jobstore configration
 #============================================================================
 org.quartz.jobStore.class=org.quartz.simpl.RAMJobStore
 #==============================================================
 # threadPool configuration
 #==============================================================
 #org.quartz.threadPool.class = org.quartz.simpl.SimpleThreadPool
 org.quartz.threadPool.threadCount = 10
 #org.quartz.threadPool.threadPriority = 5
 #org.quartz.threadPool.threadsInheritContextClassLoaderOfInitializingThread = true

新建任务类

分别创建MorningJob和DrinkJob

 package com.haq.quartz.job;

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

 import java.util.Date;

 public class DrinkJob implements Job {

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

     @Override
     public void execute(JobExecutionContext context) throws JobExecutionException {
         log.info(new Date() + "  hey! it is time to drink some water!");
     }

 }

 package com.haq.quartz.job;

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

 import java.util.Date;

 public class MorningJob implements Job {

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

     @Override
     public void execute(JobExecutionContext context) throws JobExecutionException {
         log.info(new Date() + "  Morning , it is time to get up!");
     }
 }

创建调度类 TestSchedule

 package com.haq.quartz.schedule;

 import com.haq.quartz.job.DrinkJob;
 import com.haq.quartz.job.MorningJob;
 import org.quartz.*;
 import org.quartz.impl.StdSchedulerFactory;

 public class TestSchedule {
     public static void main(String[] args) throws SchedulerException, InterruptedException {
         SchedulerFactory sf = new StdSchedulerFactory();

         Scheduler scheduler = sf.getScheduler();
         JobDetail drinkjob = JobBuilder.newJob(DrinkJob.class)
                 .withIdentity("drinkjob", "group1")
                 .build();
         Trigger drinktrgger = TriggerBuilder.newTrigger()
                 .withIdentity("drinktrgger", "group1")
                 .startNow()
                 .withSchedule(SimpleScheduleBuilder.simpleSchedule()
 //                                    .withIntervalInHours(1)  为方便测试，改为5秒执行一次
                         .withIntervalInSeconds(5)
                         .withRepeatCount(8))
                 .build();

         JobDetail morningjob = JobBuilder.newJob(MorningJob.class)
                 .withIdentity("morningjob", "group1")
                 .build();
         Trigger morningtrgger = TriggerBuilder.newTrigger()
                 .withIdentity("morningtrgger", "group1")
                 .startNow()
                 .withSchedule(DailyTimeIntervalScheduleBuilder.dailyTimeIntervalSchedule()
 //                                    .onMondayThroughFriday() 为方便测试将时间调整为当前时间
                         .onSaturdayAndSunday()
                         .startingDailyAt(new TimeOfDay(12,35,0))
                         .withRepeatCount(5))
                 .build();

         scheduler.scheduleJob(drinkjob, drinktrgger);
         scheduler.scheduleJob(morningjob, morningtrgger);

         scheduler.start();

         Thread.sleep(90L * 1000L);

         scheduler.shutdown();
     }
 }

运行结果如下：

源码下载：

https://github.com/xiaodongio/quartz_learning/tree/day1