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());
    }

}