java 編寫(xiě)定時(shí)器實(shí)例 每天定時(shí)執(zhí)行和N分鐘執(zhí)行一次

1、Java定時(shí)器的使用，這里簡(jiǎn)單的說(shuō)兩種使用方式。在這里我用的是線程，可以單獨(dú)啟動(dòng)。僅供參考！第一種：要求程序定時(shí)執(zhí)行某個(gè)方法，如：沒(méi)5分鐘掃描數(shù)據(jù)庫(kù)tb_test表package com.jwht.hbgs.datatransfer;import java.io.IOException;/* * <p>Title: </p> * <p>Description: </p> * <p>Copyright: Copyright (c) 2005</p> * <p>Company: </p> * autho

2、r ASLU * version 1.0 */public class TsMGap public TsMGap() public void go() throws IOException ThreadTimer th=new ThreadTimer(); th.start();/線程啟動(dòng) public static void main(String args) TsMGap tm = new TsMGap(); try tm.go(); catch(Exception e) e.printStackTrace(); package com.jwht.hbgs.datatransfer;imp

3、ort java.util.*;/* * <p>Title: </p> * <p>Description: </p> * <p>Copyright: Copyright (c) 2005</p> * <p>Company: </p> * author ASLU * version 1.0 */public class ThreadTimer extends Thread public ThreadTimer() static int num=5;/分鐘 public void start() /每5

4、分鐘執(zhí)行一次定時(shí)任務(wù) RefreshItem ri = new RefreshItem(60*ThreadTimer.num); public static void main(String args) ThreadTimer tm = new ThreadTimer(); tm.start();/啟動(dòng)ThreadTimer中start()方法。 public static class RefreshItem public RefreshItem(int seconds) Timer timer = new Timer(); timer.scheduleAtFixedRate(new Refr

5、eshTask(), new Date(), seconds * 1000); class RefreshTask extends TimerTask public void run() /查詢(xún) TsManagerBean tm=new TsManagerBean(); tm.getTsTxSmsinfo(); tm.getTsTxSmsinfo2(); package com.jwht.hbgs.datatransfer;import java.sql.*;import java.util.*;import java.util.Date;import mon.*;import java.te

6、xt.*;import com.jwht.hbgs.datatransfer.*;import com.jwht.hbgs.smsoper.*;/* * <p>Title: </p> * <p>Description: </p> * <p>Copyright: Copyright (c) 2005</p> * <p>Company: </p> * author ASLU * version 1.0 * 2013年11月14日 09:42:03改 發(fā)送后update iseend=1不刪除數(shù)據(jù) */p

7、ublic class TsManagerBean public TsManagerBean() public void getTsTxSmsinfo2() 具體實(shí)現(xiàn)方法。 第二中：要求程序在某個(gè)特定時(shí)間去執(zhí)行某項(xiàng)任務(wù)，如：要求程序每天晚上23:19:10去執(zhí)行任務(wù)創(chuàng)建啟動(dòng)線程的ShanChu類(lèi)package .dingshishanchu;import java.io.IOException;public class ShanChu public ShanChu() public void go() throws IOException ShanChuTimer th=new ShanChu

8、Timer(); th.start();/線程啟動(dòng) System.out.println("啟動(dòng)定時(shí)刪除線程。"); public static void main(String args) ShanChu tm = new ShanChu(); try tm.go(); catch(Exception e) e.printStackTrace(); 創(chuàng)建定時(shí)器ShanChuTimerpackage .dingshishanchu;import java.util.*;public class ShanChuTimer extends Thread public ShanC

9、huTimer() private static final long PERIOD_DAY = 24*60*60*1000;/以毫秒為單位，24*60*60*1000是1天public void start() RefreshItem ri = new RefreshItem();public static void main(String args) ShanChuTimer tm = new ShanChuTimer();tm.start();/ 啟動(dòng)ThreadTimer中start()方法。/ 定制每天的xx:xx:xx執(zhí)行，/ 每天的date時(shí)刻執(zhí)行task, 僅執(zhí)行一次/ tim

10、er.schedule(task, date);public static class RefreshItem public RefreshItem() / timer.scheduleAtFixedRate(new RefreshTask(), new Date(),seconds */ 200); /1000毫秒=1分鐘/ 設(shè)置執(zhí)行時(shí)間Calendar calendar = Calendar.getInstance();int year = calendar.get(Calendar.YEAR);int month = calendar.get(Calendar.MONTH);int da

11、y = calendar.get(Calendar.DAY_OF_MONTH);/ 每天/這里說(shuō)明一點(diǎn)，如果你啟動(dòng)任務(wù)的時(shí)間（上午10點(diǎn)）晚于你設(shè)定的時(shí)間（早上8點(diǎn)），程序會(huì)立馬執(zhí)行一次，這里需要將day+1默認(rèn)推遲一天。這里我設(shè)定的時(shí)間是晚上22點(diǎn)01分18秒，所以只要我在這個(gè)時(shí)間前啟動(dòng)就ok.calendar.set(year, month, day, 22, 01, 18);/設(shè)置固定時(shí)間Date date = calendar.getTime();System.out.println("第一次執(zhí)行時(shí)間是："+date);Timer timer = new Timer

12、();timer.schedule(new RefreshTask(), date, PERIOD_DAY);/間隔時(shí)間為PERIOD_DAY（1天）class RefreshTask extends TimerTask public void run() ShanChuBean tm = new ShanChuBean();System.out.println("執(zhí)行定時(shí)刪除進(jìn)行中。");tm.del();創(chuàng)建具體實(shí)現(xiàn)的ShanChuBean類(lèi)package .dingshishanchu;import java.io.File;import java.text.Simp

13、leDateFormat;import java.util.Date;public class ShanChuBean public ShanChuBean() public void del() SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");/ 設(shè)置日期格式String loadpath = "D:/workspace/sc" + "/dir"File file = new File(loadpath);/ 里面輸入特定目錄/ System.out.println(loadpath);/ System.out.println("file.length() "+file.length();/需要loadpath指定到文件名，輸出文件大小File temp = null;File filelist = file.listFiles();for (int i = 0; i < filelist.length; i+) temp = filelisti;if (temp.getName().endsWith("") / 獲得文件名，如果后綴為“”，這個(gè)你自己寫(xiě)，就刪除文件tem