/***任务定时调度:Timer类 (相当于闹钟) TimerTask类 (抽象类)* */
package cn.sxt.thread;import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Timer;
import java.util.TimerTask;public class Test_0412_TimeDispatch {public static void main(String[] args) {Timer timer=new Timer();//闹钟//timer.schedule(new MyTask(), 3000);//执行安排。3秒后执行MyTask()类中run方法,仅执行1次//timer.schedule(new MyTask(), 2000,1000);//中间参数：第一次执行的时间，2秒后，每隔1秒执行一次run方法,执行多次//timer.schedule(new MyTask(), new Date(3000),1000);//5秒后，每隔1秒执行一次run方法,执行多次Calendar calendar=new GregorianCalendar(2019,03,10,00,14,50);//指定2019年04年10日00点14分50秒这个时间来运行程序timer.schedule(new MyTask(), calendar.getTime(),1000);}}
//任务类
class MyTask extends TimerTask{public void run() {for (int i = 0; i < 5; i++) {System.out.println(i+"->休息一下");}System.out.println("end");}}

package cn.sxt.thread;import static org.quartz.DateBuilder.evenSecondDateAfterNow;
import static org.quartz.JobBuilder.newJob;
import static org.quartz.TriggerBuilder.newTrigger;import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerFactory;
import org.quartz.Trigger;
import org.quartz.impl.StdSchedulerFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;import java.util.Date;public class SimpleExample {public void run() throws Exception {//1、 创建Scheduler的工厂SchedulerFactory sf = new StdSchedulerFactory();//2、从工厂获得调度器Scheduler sched = sf.getScheduler();//3、创建JobDetailJobDetail job = newJob(HelloJob.class).withIdentity("job1", "group1").build();//4、触发器    Date runTime=evenSecondDateAfterNow();Trigger trigger = newTrigger().withIdentity("trigger1", "group1").startAt(runTime).build();// 5、注册任务和触发条件
    sched.scheduleJob(job, trigger);//6、启动
    sched.start();try {// 5秒后停下Thread.sleep(5L * 1000L);} catch (Exception e) {}sched.shutdown(true);}public static void main(String[] args) throws Exception {SimpleExample example = new SimpleExample();example.run();}}

package cn.sxt.thread;import java.util.Date;import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;public class HelloJob implements Job {public HelloJob() {}public void execute(JobExecutionContext context)throws JobExecutionException {System.out.println("---start----");System.out.println("Hello World"+new Date());System.out.println("---end----");}
}