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发表于 2011-10-21 10:36 |只看该作者 |倒序浏览

Java 定时器

1.package com.xuanzhi.userstat.spweekly;
2.
3.import java.util.Timer;
4.
5.import javax.servlet.ServletContextEvent;
6.import javax.servlet.ServletContextListener;
7.
8.public class TimerListener implements ServletContextListener {
9.
10. private Timer timer = null;
11. private SampleTask sampletask;
12. public static String configPath = "";
13. @Override
14. public void contextDestroyed(ServletContextEvent event) {
15. // TODO Auto-generated method stub
16. timer.cancel();
17. event.getServletContext().log("定时器销毁");
18. }
19.
20. @Override
21. public void contextInitialized(ServletContextEvent event) {
22. // TODO Auto-generated method stub
23.
24. configPath = event.getServletContext().getRealPath("/")+"upload/splist.xls";
25. System.out.println(configPath);
26.
27. timer = new Timer(true);
28.
29. sampletask = new SampleTask(event.getServletContext());
30. event.getServletContext().log("定时器已启动");
31.
32. timer.schedule(sampletask, 0,60*60);
33.
34. event.getServletContext().log("已添加任务调度表");
35.
36. }
37.
38.}

复制代码

package com.xuanzhi.userstat.spweekly;

import java.util.Timer;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
public class TimerListener implements ServletContextListener {
private Timer timer = null;
private SampleTask sampletask;
public static String configPath = "";
@Override
public void contextDestroyed(ServletContextEvent event) {
// TODO Auto-generated method stub
timer.cancel();
event.getServletContext().log("定时器销毁");
}
@Override
public void contextInitialized(ServletContextEvent event) {
// TODO Auto-generated method stub
configPath = event.getServletContext().getRealPath("/")+"upload/splist.xls";
System.out.println(configPath);
timer = new Timer(true);
sampletask = new SampleTask(event.getServletContext());
event.getServletContext().log("定时器已启动");
timer.schedule(sampletask, 0,60*60);
event.getServletContext().log("已添加任务调度表");
}
}

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Java代码

1.package com.xuanzhi.userstat.spweekly;
2.
3.import java.text.ParseException;
4.import java.text.SimpleDateFormat;
5.import java.util.Calendar;
6.import java.util.Date;
7.import java.util.TimerTask;
8.
9.import javax.servlet.ServletContext;
10.
11.import com.xuanzhi.userstat.dailydata.MailUtil;
12.
13.public class SampleTask extends TimerTask {
14.
15. public SampleTask(ServletContext context) {
16. this.context = context;
17. }
18.
19. private ServletContext context;
20. private static boolean isRunning = false;
21. private static boolean flag = true;
22. private static final int WEEK_DAY = 2;
23.
24. @Override
25. public void run() {
26. // TODO Auto-generated method stub
27. SimpleDateFormat fm = new SimpleDateFormat("yyyy-MM-dd");
28. Calendar cal = Calendar.getInstance();
29. cal.setTime(new Date());
30.
31.
32. if(!isRunning)
33. {
34. if(WEEK_DAY == cal.get(Calendar.DAY_OF_WEEK) && flag)
35. {
36. isRunning = true;
37. context.log("开始执行指定任务");
38.
39. //需要执行的代码
40. getSpContent gs = new getSpContent();
41. String mailCountent = gs.sendMail(TimerListener.configPath);
42.
43. MailUtil.sendMail("mengfanzhi@yolotone.com","","", "通道收入周报 "+fm.format(new Date()),mailCountent , null);
44.
45. isRunning = false;
46. flag = false;
47. context.log("指定任务执行结束");
48. }
49. }
50. else
51. {
52. context.log("上一次任务执行还未结束");
53. }
54.
55. if(WEEK_DAY != cal.get(Calendar.DAY_OF_WEEK))
56. {
57. flag = true;
58. }
59. }
60.
61.}
package com.xuanzhi.userstat.spweekly;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.TimerTask;
import javax.servlet.ServletContext;
import com.xuanzhi.userstat.dailydata.MailUtil;
public class SampleTask extends TimerTask {
public SampleTask(ServletContext context) {
this.context = context;
}
private ServletContext context;
private static boolean isRunning = false;
private static boolean flag = true;
private static final int WEEK_DAY = 2;
@Override
public void run() {
// TODO Auto-generated method stub
SimpleDateFormat fm = new SimpleDateFormat("yyyy-MM-dd");
Calendar cal = Calendar.getInstance();
cal.setTime(new Date());
if(!isRunning)
{
if(WEEK_DAY == cal.get(Calendar.DAY_OF_WEEK) && flag)
{
isRunning = true;
context.log("开始执行指定任务");
//需要执行的代码
getSpContent gs = new getSpContent();
String mailCountent = gs.sendMail(TimerListener.configPath);
MailUtil.sendMail("mengfanzhi@yolotone.com","","", "通道收入周报 "+fm.format(new Date()),mailCountent , null);
isRunning = false;
flag = false;
context.log("指定任务执行结束");
}
}
else
{
context.log("上一次任务执行还未结束");
}
if(WEEK_DAY != cal.get(Calendar.DAY_OF_WEEK))
{
flag = true;
}
}
}

复制代码

最后在web.xml中配置监听器

Java代码

1.<listener>
2.<listener-class>com.xuanzhi.userstat.spweekly.TimerListener</listener-class>
3.</listener>

复制代码

java, java

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