1 package com.xx.model;
2
3 import java.util.Calendar;
4 import java.util.Date;
5 import java.util.Timer;
6 import javax.servlet.ServletContextEvent;
7 import javax.servlet.ServletContextListener;
8 import org.apache.commons.logging.Log;
9 import org.apache.commons.logging.LogFactory;
10 import com.xx.model.XXTask;
11
12 public class XXTimerListener implements ServletContextListener {
13
14 private Timer timer = null;
15 private static final Log log = LogFactory.getLog(XXTimerListener.class);
16 final Log logrecords = LogFactory.getLog("records");
17
18 public void contextDestroyed(ServletContextEvent arg0) {
19 // TODO Auto-generated method stub
20
21 }
22
23 public void contextInitialized(ServletContextEvent arg0) {
24 // TODO Auto-generated method stub
25
26 try {
27 timer = new Timer(true);
28 try {
29 Calendar calendar = Calendar.getInstance();
30 calendar.set(Calendar.HOUR_OF_DAY, 10); // 上午10点
31 calendar.set(Calendar.MINUTE, 0);
32 calendar.set(Calendar.SECOND, 0);
33 Date date = calendar.getTime(); // 第一次执行定时任务的时间
34 // 如果第一次执行定时任务的时间 小于当前的时间
35 // 此时要在 第一次执行定时任务的时间加一天，以便此任务在下个时间点执行。如果不加一天，任务会立即执行。
36 if (date.before(new Date())) {
37 date = addDay(date, 1);
38 }
39 timer.schedule(new XXTask(),date,24*3600*1000);
40 log.info("任务创建成功！");
41 } catch (Exception e) {
42 log.error("任务创建失败！", e);
43 }
44 } catch (Exception e) {
45 // TODO Auto-generated catch block
46 e.printStackTrace();
47 }
48 }
49
50 public Date addDay(Date date, int num) {
51 Calendar startDT = Calendar.getInstance();
52 startDT.setTime(date);
53 startDT.add(Calendar.DAY_OF_MONTH, num);
54 return startDT.getTime();
55 }
56 }
1 package com.xx.model;
2 import java.util.TimerTask;
3 import org.apache.commons.logging.Log;
4 import org.apache.commons.logging.LogFactory;
5 /**
6 * @author qjl
7 *
8 */
9 public class XXTask extends TimerTask {
10
11 private static final Log log = LogFactory.getLog(XXTask.class);
12 MeasureCountsAjax mscAjax = new MeasureCountsAjax();
13
14 @Override
15 public void run() {
16
17 log.debug("定时任务" + new Date(System.currentTimeMillis()));
18 try {
19 //定时任务要执行的方法写这里
20 } catch (Exception e) {
21 log.error("定时运行失败", e);
22 } finally {
23 }
24 }
25 }
1 <listener>
2 <listener-class>
3 com.xx.model.XXTimerListener
4 </listener-class>
5 </listener>
