djtask.java

一个真实项目的源代码。有一个比较优秀的时间类

package com.zx.gwgl;

import java.io.IOException;
import java.util.Date;
import java.util.Timer;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.work.util.DateUtil;
import com.zx.cheliang.CheLiangDjTask;
public class DjTask extends HttpServlet {
	private static Timer t = new Timer();
	
	/* (non-Javadoc)
	 * @see javax.servlet.GenericServlet#init()
	 */
	public void init()throws ServletException  {
		FaWenDjTask  fawenDjTask = new FaWenDjTask();
		ShouWenDjTask shouWenDjTask = new ShouWenDjTask();
		QianBaoDjTask qianbaoDjTask = new QianBaoDjTask();
		
		CheLiangDjTask cheLiangDjTask = new CheLiangDjTask();
		
		Date d = new Date();//2007-06-27 23:59:59
		int year = Integer.parseInt(DateUtil.getCurrentYear());
		int month = Integer.parseInt(DateUtil.getCurrentMonth())-1;
		int day = Integer.parseInt(DateUtil.getCurrentDay())-1;
		d  = DateUtil.getDate(year,month,day,23,59,59);//2007-06-27 23:59:59
		System.out.println("自动登记的定时器开始启动！设置时间为："+d.toLocaleString()+"。");
		t.scheduleAtFixedRate(fawenDjTask,d,24*60*60*1000);
		t.scheduleAtFixedRate(shouWenDjTask,d,24*60*60*1000);
		t.scheduleAtFixedRate(qianbaoDjTask,d,24*60*60*1000);
		
		t.scheduleAtFixedRate(cheLiangDjTask,d,24*60*60*1000);//车辆信息自动登记
		
		
		System.out.println("自动登记的定时器启动结束！成功启动！每天夜里12点开始执行任务！");
	}

	/* (non-Javadoc)
	 * @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException  {

	}

	/* (non-Javadoc)
	 * @see javax.servlet.http.HttpServlet#doPost(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException  {

	}
	/**
	 * 销毁定时器，施放资源。
	 */
	public void destory(){
		System.out.println("自动登记的定时器开始销毁！");
		t.cancel();
		System.out.println("自动登记的定时器销毁结束！");
		
	}
	
	/**
	 * 测试程序。
	 * @param args
	 * @throws Exception
	 */
	public static void main(String[] args) throws Exception{
		DjTask d  = new DjTask();
		d.init();
	}
}