1.准备环境jar包

Your project will need (at least) the Quartz core library, named quartz-x.y.z.jar (where x.y.z is a version number), in its classpath.if you are a Maven user you can add the dependencies (only the first below is required):

 <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>
2.通过工厂调用Schedulers，只有当start()方法被调用时，才会触发定时器操作。

// Grab the Scheduler instance from the Factory

  Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();

  // and start it off

  scheduler.start();

3.引入相关API

　import org.quartz.Scheduler;

  import org.quartz.SchedulerException;

  import org.quartz.impl.StdSchedulerFactory;

  import static org.quartz.JobBuilder.*;

  import static org.quartz.TriggerBuilder.*;

 import static org.quartz.SimpleScheduleBuilder.*;

4.实现Job接口，并编写execute方法

public class MyJob implements org.quartz.Job {

      public MyJob() {

      }

      public void execute(JobExecutionContext context) throws JobExecutionException {

          System.err.println("Hello World!  MyJob is executing.");

      }

  }
5.And then schedule those jobs with triggers that define at what time(s) the job should run.

// define the job and tie it to our MyJob class

  JobDetail job = newJob(MyJob.class)

      .withIdentity("job1", "group1")

      .build();

  // Trigger the job to run now, and then repeat every 40 seconds

  Trigger trigger = newTrigger()

      .withIdentity("trigger1", "group1")

      .startNow()

      .withSchedule(simpleSchedule()

              .withIntervalInSeconds(40)

              .repeatForever())

      .build();

  // Tell quartz to schedule the job using our trigger

  scheduler.scheduleJob(job, trigger);