Java定时任务小结之TimerTask

利用java提供的timer类和timerTask类进行简单的定时任务操作(即排程任务)。

package com.linming.task;

import java.util.Timer;

/**
 * @author lin ming 
 * @date 2012-4-11 下午08:23:41
 * @description
 */
public class TimeTask {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Timer timer = new Timer();
		timer.schedule(new TestTask(), 1000);//程序运行一分钟后执行
	//	timer.schedule(new TestTask(), 1000, 1000);//程序运行一分钟后执行，且间隔一分钟后循环执行
	//	timer.schedule(new TestTask(), DateTime);//DateTime为设定的执行时间对象
	//	timer.schedule(new TestTask(), DateTime, time);//time为延迟时间

	}
}

TestTask类

package com.linming.task;

import java.util.TimerTask;

/**
 * @author lin ming 
 * @date 2012-4-11 下午08:25:41
 * @description
 */
public class TestTask extends TimerTask {

	@Override
	public void run() {
		System.out.println("定时任务在这里执行");

	}

}

基于Spring配置的简单定时任务实现(这里提供核心源码)

applicationContext.xml

 <bean id="emailTracker" class="com.linming.task.EmailTracker">
		<property name="sendMail" ref="sendMail"/>
 	</bean>
	
	<bean id="scheduledTask" class="org.springframework.scheduling.timer.ScheduledTimerTask">
	    <!-- wait 10 seconds before starting repeated execution -->
	    <property name="delay" value="0" />
	    <!-- run every 300 seconds -->
	    <property name="period" value="300000" />
	    <property name="timerTask" ref="emailTracker" />
	</bean>    
	
	<bean id="timerFactory" class="org.springframework.scheduling.timer.TimerFactoryBean">
	    <property name="scheduledTimerTasks">
	        <list>
	            <ref bean="scheduledTask" />
	        </list>
	    </property>
	</bean>

EmailTracker

public class EmailTracker extends TimerTask {
	private SendMail sendMail;

	@Override
	public void run() {
		// 发送邮件的具体实现
		
	}

	public SendMail getSendMail() {
		return sendMail;
	}

	public void setSendMail(SendMail sendMail) {
		this.sendMail = sendMail;
	}
	.....
}

再增加一个小示例，源码如下(直接运行能看到结果):

package com.pratise.test;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.util.Timer;
import java.util.TimerTask;
import java.util.Vector;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;

/**
 * @author F3226080
 * @date Apr 13, 2012
 * 
 */
public class JTableDemo {
	private Vector vector1 = new Vector();
//	private Vector vector2 = new Vector();
	private Vector vector3 = new Vector();
	JTable student;
	JScrollPane pane3;
	JPanel panel;
	JFrame frame;
	int i = 1;//主要用于区别是否成功刷新了页面
	
	public JTableDemo() {
		vector1.addElement("提单号");
		vector1.addElement("dd");
		vector1.addElement("总重量");
		vector1.addElement("总卷数");
		vector1.addElement("客户名称");
		vector1.addElement("有效开始时间");
		vector1.addElement("有效结束时间");
		vector1.addElement("备注");
	}
	
	public void createTable(){
		student = new JTable (vector3,vector1);
		student.setPreferredScrollableViewportSize(new Dimension(1000, 100));//设置表格的大小
		student.setRowHeight (30);//设置每行的高度为20
		student.setSelectionForeground (Color.black);//设置所选择行的前景色
		student.setGridColor (Color.black);//设置网格线的颜色
		student.setShowGrid (true);//是否显示网格线
		student.setShowHorizontalLines (true);//是否显示水平的网格线
		student.setShowVerticalLines (true);//是否显示垂直的网格线
		student.doLayout ();//使表布局行与列
		student.setBackground (Color.lightGray);//表格背景
		pane3 = new JScrollPane (student);
		panel = new JPanel (new GridLayout (0, 1));
		panel.setPreferredSize (new Dimension (1000,400));
		panel.add (pane3);
		frame = new JFrame ("xxxxxxxxx");
		frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
		frame.setContentPane (panel);//将Panel加入窗口中
		frame.setBounds(200, 200, 1000, 300);
		frame.setVisible(true);
	}

	public static void main(String[] args) {
		JTableDemo demo = new JTableDemo();
		demo.createTable();
		demo.excuteTimerTask();
	}
	
	public void excuteTimerTask(){
        final Timer timer = new Timer();
        TimerTask tt=new TimerTask() { 
            @Override
            public void run() {
            	vector3.clear();
            	//你需要处理的查询结果
            	Vector vector2 = new Vector();
            	if(i==1) {
            		vector2.addElement("1021");
            		vector2.addElement("1021");
            		vector2.addElement("1021");
            		vector2.addElement("1021");
            		vector2.addElement("1021");
            		vector2.addElement("1021");
            		vector2.addElement("1021");
            		vector2.addElement("1021");
            	} else if(i==3){
            		vector2.addElement("1111111");
            		vector2.addElement("1111111");
            		vector2.addElement("1111111");
            		vector2.addElement("1111111");
            		vector2.addElement("1111111");
            		vector2.addElement("1111111");
            		vector2.addElement("1111111");
            		vector2.addElement("1111111");
            	} else{
            		vector2.addElement("2222");
            		vector2.addElement("222");
            		vector2.addElement("222");
            		vector2.addElement("22");
            		vector2.addElement("1111111");
            		vector2.addElement("1111111");
            		vector2.addElement("1111111");
            		vector2.addElement("1111111");
            	}
            	i++;
        		vector3.addElement(vector2);
        		student = new JTable (vector3,vector1);
        		pane3 = new JScrollPane (student);
        		frame.setContentPane(panel);
        		frame.validate();
            }
        };
        timer.schedule(tt, 1000, 1000);
    }

}