java项目(非ssm等框架)下的quartz定时器任务详解编程语言

package quartz; 
 
import java.text.SimpleDateFormat; 
import java.util.Date;  
 
import org.quartz.Job;  
import org.quartz.JobExecutionContext;  
import org.quartz.JobExecutionException;  
  
public class MyJob implements Job {  
  
    @Override  
    public void execute(JobExecutionContext arg0) throws JobExecutionException {  
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss SSS");  
        System.out.println(sdf.format(new Date()));  
    }  
  
} 

package quartz; 
 
import static org.quartz.CronScheduleBuilder.cronSchedule;  
import static org.quartz.JobBuilder.newJob;  
import static org.quartz.TriggerBuilder.newTrigger;  
  
import java.text.SimpleDateFormat;  
import java.util.Date;  
  
import org.quartz.CronTrigger;  
import org.quartz.JobDetail;  
import org.quartz.Scheduler;  
import org.quartz.SchedulerFactory;  
import org.quartz.impl.StdSchedulerFactory;  
  
public class Test {  
    public void go() throws Exception {  
        // 首先，必需要取得一个Scheduler的引用  
      SchedulerFactory sf = new StdSchedulerFactory();  
        Scheduler sched = sf.getScheduler();  
        //jobs可以在scheduled的sched.start()方法前被调用  
          
        //job 1将每隔20秒执行一次  
        JobDetail job = newJob(MyJob.class).withIdentity("job1", "group1").build();  
        CronTrigger trigger = newTrigger().withIdentity("trigger1", "group1").withSchedule(cronSchedule("0/20 * * * * ?")).build();  
        Date ft = sched.scheduleJob(job, trigger);  
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss SSS");  
        System.out.println(job.getKey() + " 已被安排执行于: " + sdf.format(ft) + "，并且以如下重复规则重复执行: " + trigger.getCronExpression());  
  
        // job 2将每2分钟执行一次（在该分钟的第15秒)  
        job = newJob(MyJob.class).withIdentity("job2", "group1").build();  
        trigger = newTrigger().withIdentity("trigger2", "group1").withSchedule(cronSchedule("15 0/2 * * * ?")).build();  
        ft = sched.scheduleJob(job, trigger);  
       System.out.println(job.getKey() + " 已被安排执行于: " + sdf.format(ft) + "，并且以如下重复规则重复执行: "+ trigger.getCronExpression());  
         
        // 开始执行，start()方法被调用后，计时器就开始工作，计时调度中允许放入N个Job  
      sched.start();  
        try {  
            //主线程等待一分钟  
            Thread.sleep(60L * 1000L);  
        } catch (Exception e) {}      
       //关闭定时调度，定时器不再工作  
       sched.shutdown(true);  
}  
  
    public static void main(String[] args) throws Exception {  
  
        Test test = new Test();  
        test.go();  
    }  
  
}