Quartz 代码调用Demo

时间:2021-02-27 11:39:11

一般项目中Quartz都是直接在配置文件中配置,但是一些特殊的情况需要在代码中控制,本文为代码调用的Demo,仅供参考。更多详细的Quartz配置信息,请查看:

JAVA定时任务实现的几种方式

maven:

    <dependencies>
        <!-- quartz -->
        <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>
    </dependencies>

job:

public class MyJob implements Job {

    public void execute(JobExecutionContext context) throws JobExecutionException {
        System.out.println("quartz MyJob date:" + new Date().getTime());
    }

}

test:

 //1.创建Scheduler的工厂
      SchedulerFactory sf = new StdSchedulerFactory();
      //2.从工厂中获取调度器实例
      Scheduler scheduler = sf.getScheduler();

      //3.创建JobDetail
      JobDetail jb = JobBuilder.newJob(MyJob.class)
              .withDescription("this is a ram job") //job的描述
              .withIdentity("ramJob", "ramGroup") //job 的name和group
              .build();

      //任务运行的时间,SimpleSchedle类型触发器有效
      long time=  System.currentTimeMillis() + 3*1000L; //3秒后启动任务
      Date statTime = new Date(time);

      //4.创建Trigger
          //使用SimpleScheduleBuilder或者CronScheduleBuilder
      Trigger t = TriggerBuilder.newTrigger()
                  .withDescription("")
                  .withIdentity("ramTrigger", "ramTriggerGroup")
                  //.withSchedule(SimpleScheduleBuilder.simpleSchedule())
                  .startAt(statTime)  //默认当前时间启动
                  .withSchedule(CronScheduleBuilder.cronSchedule("0/2 * * * * ?")) //两秒执行一次
                  .build();

      //5.注册任务和定时器
      scheduler.scheduleJob(jb, t);

      //6.启动 调度器
      scheduler.start();