Quartz教程(一）Quick Start

在这里Download Quartz可以下载最新版本的压缩包，及查看maven配置：

<dependency>
    <groupId>org.quartz-scheduler</groupId>
    <artifactId>quartz</artifactId>
    <version>2.2.1</version>
</dependency>
<dependency>
    <groupId>org.quartz-scheduler</groupId>
    <artifactId>quartz-jobs</artifactId>
    <version>2.2.1</version>
</dependency>   

如果是下载使用，要注意相关的jar包及依赖的jar包要在classpath路径下。这里推荐使用maven或者gradle等工具。

编辑quartz.properties。Quartz有大量可配置的属性，具体可以查看这个页面：Quartz Configuration Reference。

maven项目可以配置在resources文件夹下

一个基本的配置文件内容大概是这样：

# 调度名称
org.quartz.scheduler.instanceName = MyScheduler
# 线程数量，意味着最大可以同时跑的Job数量
org.quartz.threadPool.threadCount = 3
# 所有的数据都是放在内存里，包括jobs和triggers
org.quartz.jobStore.class = org.quartz.simpl.RAMJobStore

启动报错：

public class QuickStart {
    public static void main(String[] args) {
        try {
            // Grab the Scheduler instance from the Factory
            Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();

            // and start it off
            scheduler.start();

            scheduler.shutdown();

        } catch (SchedulerException se) {
            se.printStackTrace();
        }
    }
}

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

配置一个依赖即可解决

<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-jdk14</artifactId>
    <version>1.7.25</version>
</dependency>

稍做修改：

// 定义Job
public class MyJob implements Job {

    public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
        Logger.getAnonymousLogger().info("MyJob");
    }
}

// 任务
public class QuickStart {

    public static void main(String[] args) {
        try {
            // Grab the Scheduler instance from the Factory
            Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();

            // and start it off
            scheduler.start();

            // define the job and tie it to our MyJob class
            JobDetail job = newJob(MyJob.class)
                    .withIdentity("myJob", "group1")
                    .build();

            // Trigger the job to run now, and then every 5 seconds
            Trigger trigger = newTrigger()
                    .withIdentity("myTrigger", "group1")
                    .startNow()
                    .withSchedule(simpleSchedule()
                            .withIntervalInSeconds(5)
                            .repeatForever())
                    .build();

            // Tell quartz to schedule the job using our trigger
            scheduler.scheduleJob(job, trigger);

        } catch (SchedulerException se) {
            se.printStackTrace();
        }
    }
}

日志：

五月 23, 2018 8:52:19 下午 org.quartz.impl.StdSchedulerFactory instantiate
信息: Using default implementation for ThreadExecutor
五月 23, 2018 8:52:19 下午 org.quartz.core.SchedulerSignalerImpl <init>
信息: Initialized Scheduler Signaller of type: class org.quartz.core.SchedulerSignalerImpl
五月 23, 2018 8:52:19 下午 org.quartz.core.QuartzScheduler <init>
信息: Quartz Scheduler v.2.2.1 created.
五月 23, 2018 8:52:19 下午 org.quartz.simpl.RAMJobStore initialize
信息: RAMJobStore initialized.
五月 23, 2018 8:52:19 下午 org.quartz.core.QuartzScheduler initialize
信息: Scheduler meta-data: Quartz Scheduler (v2.2.1) 'MyScheduler' with instanceId 'NON_CLUSTERED'
  Scheduler class: 'org.quartz.core.QuartzScheduler' - running locally.
  NOT STARTED.
  Currently in standby mode.
  Number of jobs executed: 0
  Using thread pool 'org.quartz.simpl.SimpleThreadPool' - with 3 threads.
  Using job-store 'org.quartz.simpl.RAMJobStore' - which does not support persistence. and is not clustered.

五月 23, 2018 8:52:19 下午 org.quartz.impl.StdSchedulerFactory instantiate
信息: Quartz scheduler 'MyScheduler' initialized from default resource file in Quartz package: 'quartz.properties'
五月 23, 2018 8:52:19 下午 org.quartz.impl.StdSchedulerFactory instantiate
信息: Quartz scheduler version: 2.2.1
五月 23, 2018 8:52:19 下午 org.quartz.core.QuartzScheduler start
信息: Scheduler MyScheduler_$_NON_CLUSTERED started.
五月 23, 2018 8:52:19 下午 start.MyJob execute
信息: MyJob
五月 23, 2018 8:52:24 下午 start.MyJob execute
信息: MyJob
五月 23, 2018 8:52:29 下午 start.MyJob execute
信息: MyJob

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