一、Quartz简介 

    Quartz是一个开放源码项目，专注于任务调度器，提供了极为广泛的特性如持久化任务，集群和分布式任务等。Spring对Quartz的集成与其对JDK Timer的集成在任务、触发器和调度计划的声明式配置方面等都非常相似。

    Quartz的核心由两个接口和两个类组成：Job和Scheduler接口，JobDetail和Trigger类。不同于JDK Timer，任务不是从实现一个Job接口的类实例开始运行，实际上Quartz在需要的时候才创建job类实例。可以使用JobDetail类来包装任务状态，并传递一个信息给Job，或在一个Job的多次执行过程之间保存信息。 

 

 

 

 

 

1.创建实体类

package cn.happy.entity;public class Plan {    private String date; //时间        private String task; //任务            public Plan(String date, String task) {        this.date = date;        this.task = task;    }        public Plan() {            }    @Override    public String toString() {        return "Plan [date=" + date + ", task=" + task + "]";    }    public String getDate() {        return date;    }    public void setDate(String date) {        this.date = date;    }    public String getTask() {        return task;    }    public void setTask(String task) {        this.task = task;    }}

2.创建RemindService层

package cn.happy.service;import java.util.ArrayList;import java.util.Date;import java.util.List;import cn.happy.entity.Plan;public class RemindService {    public List
     
       getPlansforToday(){        List
      
        list=new ArrayList
       
        ();        Plan plan1=new Plan("2016-12-17 23:02:32","Study makes me happy!!");         Plan plan2=new Plan("2016-12-17 23:02:50","Really!!");         list.add(plan1);        list.add(plan2);        return list;    }        public void printMessage(){                        List
        
          list=getPlansforToday();        for (Plan plan : list) {            System.out.println("计划的时间："+plan.getDate()+"\t"+"计划的内容："+plan.getTask()+"\t"+ new Date());                    }            }}
        
       
      
     

3.quartz层

package cn.happy.quartz;import org.quartz.Job;import org.quartz.JobExecutionContext;import org.quartz.JobExecutionException;import cn.happy.service.RemindService;public class RemindJob implements Job {private RemindService service=new RemindService();    @Override    public void execute(JobExecutionContext arg0) throws JobExecutionException {                service.printMessage();                            }    public RemindService getService() {        return service;    }    public void setService(RemindService service) {        this.service = service;    }}

4.测试类

package cn.happy.test;import java.util.Date;import org.quartz.JobBuilder;import org.quartz.JobDetail;import org.quartz.Scheduler;import org.quartz.SchedulerFactory;import org.quartz.SimpleScheduleBuilder;import org.quartz.Trigger;import org.quartz.TriggerBuilder;import org.quartz.impl.StdSchedulerFactory;import cn.happy.quartz.RemindJob;public class MyQuartzTest {    public static void tool() throws Exception{                //创建job        JobDetail job = JobBuilder.newJob(RemindJob.class)//                .withIdentity("job1", "group1").build();                //构建trigger        /*         CronTrigger trigger = TriggerBuilder.newTrigger().//                 withIdentity("trigger1", "group1").//                 withSchedule(CronScheduleBuilder.cronSchedule("0 40 18 ? * 7#3 2016"))                 .build();        */             Trigger trigger = TriggerBuilder.newTrigger()                  .withIdentity("myTrigger", "myTriggerGroup")                 .withSchedule(SimpleScheduleBuilder.simpleSchedule()                     .withIntervalInSeconds(3)//每隔三秒执行一次                     .repeatForever())                 .startAt(new Date(System.currentTimeMillis()))                 .build();                        //创建调度者工厂        SchedulerFactory sfc = new StdSchedulerFactory();        //创建一个调度者        Scheduler sched=sfc.getScheduler();            //注册并进行调度        sched.scheduleJob(job, trigger);        sched.start();        //Thread.sleep(3000);                    }        public static void main(String[] args)  {        try {            tool();        } catch (Exception e) {            e.printStackTrace();        }        System.out.println("aa");    }}

效果：