Quartz--Trigger

Trigger
Quartz中的触发器,用来告诉调度程序什么时候触发,即Trigger对象是用来触发Job的

触发器通用属性
JobKey
StartTime
EndTime
JobKey
表示job实例的表示.触发器被触发时,该指定的job实例会执行

StartTime 表示触发器额时间表首次被触发的时间
他的值的类型是Java.util.Date

EndTime
指定触发器的不再被触发的时间
他的值的类型是Java.util.Date

trigger通过builder模式创建

package cn.miye.web;

import java.text.SimpleDateFormat;
import java.util.Date;

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.quartz.JobKey;
import org.quartz.Trigger;

public class HelloJob implements Job {

    @Override
    public void execute(JobExecutionContext context) throws JobExecutionException {
        // 打印当前时间
        Date date = new Date();
        SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println("当前时间:" + sf.format(date));
        Trigger currentTrigger = context.getTrigger();
        System.out.println("任务开始时间:"+sf.format(currentTrigger.getStartTime()));
        System.out.println("任务结束时间:"+sf.format(currentTrigger.getEndTime()));
        JobKey jobKey = currentTrigger.getJobKey();
        System.out.println("JobKey的分组名称:"+jobKey.getGroup()+"JobKey的名称:"+jobKey.getName());
    }

}

package cn.miye.web;

import java.text.SimpleDateFormat;
import java.util.Date;

import org.quartz.JobBuilder;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SchedulerFactory;
import org.quartz.SimpleScheduleBuilder;
import org.quartz.Trigger;
import org.quartz.TriggerBuilder;
import org.quartz.impl.StdSchedulerFactory;

public class HelloScheduler {
    public static void main(String[] args) throws SchedulerException {
        // 打印当前时间
        Date date = new Date();
        SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println("Current Exec Time Is:" + sf.format(date));
        //获取距离当前时间3s之后的时间
        date.setTime(date.getTime()+3000);//3s
        //获取距离当前时间9s之后的时间
        Date endDate = new Date();
        endDate.setTime(endDate.getTime()+9000);
        // 创建一个JobDetail实例,将该实例与HelloJobClass绑定
        JobDetail jobDetail = JobBuilder.newJob(HelloJob.class)
                .withIdentity("myJob", "group1")
                .build();
        // 创建一个Trigger实例,定义该job立即执行,并每隔两秒钟执行一次,直到程序停止
        Trigger trigger = TriggerBuilder.newTrigger()
                .withIdentity("mytrigger", "group1")
                .startAt(date)//表示在date的时间开始执行
                .endAt(endDate)//表示最后的执行时间
                .withSchedule(SimpleScheduleBuilder.simpleSchedule()
                .withIntervalInSeconds(2).repeatForever()).build();
        // 创建Scheduler实例
        SchedulerFactory sfact = new StdSchedulerFactory();
        Scheduler scheduler = sfact.getScheduler();
        scheduler.start();
        scheduler.scheduleJob(jobDetail, trigger);
    }
}

子类

　　

SimpleTrigger
　　作用
　　在一个指定时间段内执行一次作业任务
　　或在指定的时间间隔内多次执行作业任务

package cn.miye.web;

import java.text.SimpleDateFormat;
import java.util.Date;

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;

public class HelloJob implements Job {

    @Override
    public void execute(JobExecutionContext context) throws JobExecutionException {
        // 打印当前时间
        Date date = new Date();
        SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println("当前时间:" + sf.format(date));
        System.out.println("Hello Word!");
    }

}

package cn.miye.web;

import java.text.SimpleDateFormat;
import java.util.Date;

import org.quartz.JobBuilder;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SchedulerFactory;
import org.quartz.SimpleTrigger;
import org.quartz.TriggerBuilder;
import org.quartz.impl.StdSchedulerFactory;

public class HelloScheduler {
    public static void main(String[] args) throws SchedulerException {
        // 打印当前时间
        Date date = new Date();
        SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println("Current Exec Time Is:" + sf.format(date));
        //获取距离当前时间4s之后的时间
        date.setTime(date.getTime()+4000L);//4s
        // 创建一个JobDetail实例,将该实例与HelloJobClass绑定
        JobDetail jobDetail = JobBuilder.newJob(HelloJob.class)
                .withIdentity("myJob", "group1")
                .build();
        // 创建一个SimpleTrigger实例,在距离当前时间4s中后执行且只执行一次
        SimpleTrigger trigger = (SimpleTrigger) TriggerBuilder.newTrigger()
                .withIdentity("mytrigger", "group1")
                .startAt(date)
                .build();
        // 创建Scheduler实例
        SchedulerFactory sfact = new StdSchedulerFactory();
        Scheduler scheduler = sfact.getScheduler();
        scheduler.start();
        scheduler.scheduleJob(jobDetail, trigger);
    }
}

//创建一个SimpleTrigger实例,在距离当前时间4s中后执行且每个两秒执行一次,执行3次
SimpleTrigger trigger = (SimpleTrigger)TriggerBuilder.newTrigger().withIdentity("mytrigger", "group1")
        .startAt(date)
        .withSchedule(SimpleScheduleBuilder.simpleSchedule()
                .withIntervalInSeconds(2).withRepeatCount(3)).build();

withRepeatCount(SimpleTrigger.REPEAT_INDEFINITELY)
//执行无数次

CronTrigger

作用
基于日历的作业调度器
而不是像Simpletrigger 那样精确指定间隔时间,比SimpleTrigger更常用

(每月某天或者每周某天)
基于Cron表达式
Cron表达式
用于配置CronTrigger实例
是由7个子表达式组成的字符串,描述了时间表的详细信息
格式:[秒] [分] [时] [日] [月] [周] [年]

* 每

简单例子

package cn.miye.web;

import java.text.SimpleDateFormat;
import java.util.Date;

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;

public class HelloJob implements Job {

    @Override
    public void execute(JobExecutionContext context) throws JobExecutionException {
        // 打印当前时间
        Date date = new Date();
        SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println("当前时间:" + sf.format(date));
        System.out.println("Hello World");
    }

}

package cn.miye.web;

import java.text.SimpleDateFormat;
import java.util.Date;

import org.quartz.CronScheduleBuilder;
import org.quartz.CronTrigger;
import org.quartz.JobBuilder;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SchedulerFactory;
import org.quartz.TriggerBuilder;
import org.quartz.impl.StdSchedulerFactory;

public class HelloScheduler {
    public static void main(String[] args) throws SchedulerException {
        // 打印当前时间
        Date date = new Date();
        SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println("Current Exec Time Is:" + sf.format(date));
        // 创建一个JobDetail实例,将该实例与HelloJobClass绑定
        JobDetail jobDetail = JobBuilder.newJob(HelloJob.class)
                .withIdentity("myJob", "group1")
                .build();
        // 每年每周每月每天每时每分秒钟执行一次
        CronTrigger trigger = (CronTrigger)TriggerBuilder
                .newTrigger()
                .withIdentity("mytrigger", "group1")
                .withSchedule(
                        CronScheduleBuilder.cronSchedule("* * * * * ? *"))
                .build();
        // 创建Scheduler实例
        SchedulerFactory sfact = new StdSchedulerFactory();
        Scheduler scheduler = sfact.getScheduler();
        scheduler.start();
        scheduler.scheduleJob(jobDetail, trigger);
    }
}

在线Cron表达式生成工具http://www.pdtools.net/tools/becron.jsp