package com.cvicse.ump.timer.service;

import java.util.Date;

import java.util.Timer;

import com.cvicse.ump.timer.task.TimTaskTest;

/**

 * 定时任务管理器

 * @author dyh

 *

 */

public class TimerManager {

    /**

     * 单例模式

     */

    private static TimerManager timerManager = null;

    private TimerManager(){}

    public static TimerManager getInstance(){

        if(timerManager == null){

            timerManager = new TimerManager();

        }

        return timerManager;

    }

    /**

     * 定时器

     */

    private Timer timer = new Timer("homePageTimer");

    /**

     * 定时任务

     */

    private TimTaskTest timerTask = null;

    /**

     * 启动定时任务

     */

    public void startTimerTask(){

        timer.purge();

        if(timerTask==null){

            timerTask = new TimTaskTest();

        }

        timer.schedule(timerTask, new Date(), 5000);

    }

    /**

     * 定时任务取消

     */

    public void stopTimerTask(){

        timerTask.cancel();

        timerTask = null;//如果不重新new，会报异常

    }

}

import java.util.Calendar;

import java.util.Date;

import java.util.Timer;

import java.util.TimerTask;

public class Test {

    public static void main(String[] args) throws InterruptedException {

        System.out.println("当前时间为：" + new Date());

        Calendar c = Calendar.getInstance();

        Date runDate1 = c.getTime();

        System.out.println("计划时间为：" + runDate1);

        MyTaskA task1 = new MyTaskA();

        MyTaskB task2 = new MyTaskB();

        Timer timer = new Timer();

        timer.schedule(task1, runDate1, 4000);

        timer.schedule(task2, runDate1, 4000);

    }

}

class MyTaskA extends TimerTask {

    @Override

    public void run() {

        System.out.println("A run timer=" + new Date());

        this.cancel();// 调用的是TimerTask类中的cancel()方法

        System.out.println("A任务自己移除自己,B任务不受影响，继续运行");

    }

}

class MyTaskB extends TimerTask {

    @Override

    public void run() {

        System.out.println("B run timer=" + new Date());

    }

}

import java.util.Calendar;

import java.util.Date;

import java.util.Timer;

import java.util.TimerTask;

public class Test {

    public static void main(String[] args) throws InterruptedException {

        System.out.println("当前时间为：" + new Date());

        Calendar c = Calendar.getInstance();

        Date runDate1 = c.getTime();

        System.out.println("计划时间为：" + runDate1);

        MyTaskA task1 = new MyTaskA();

        MyTaskB task2 = new MyTaskB();

        Timer timer = new Timer();

        timer.schedule(task1, runDate1, 4000);

        timer.schedule(task2, runDate1, 4000);

         Thread.sleep(12000);

         timer.cancel();

         System.out.println("A、B任务都移除了");

    }

}

class MyTaskA extends TimerTask {

    @Override

    public void run() {

        System.out.println("A run timer=" + new Date());

    }

}

class MyTaskB extends TimerTask {

    @Override

    public void run() {

        System.out.println("B run timer=" + new Date());

    }

}