目的实现一个间隔轮询执行的功能。
从网上看到java中可以使用Timer，于是本篇文件就对自己的使用记录，进行一次记录。
主函数：
1 package cn.test.timer;
2
3 import java.io.FileOutputStream;
4 import java.io.IOException;
5 import java.io.OutputStreamWriter;
6 import java.text.SimpleDateFormat;
7 import java.util.Date;
8 import java.util.Timer;
9 import java.util.TimerTask;
10
11 public class TestTimer {
12 public static void main(String[] args) {
13 Timer timer = new Timer();
14 // schedule task
15 timer.schedule(new MyTimerTask(), 0, 2000);
16
17 System.out.println("task over time:" + new Date());
18
19 try {
20 Thread.sleep(8000);
21 } catch (InterruptedException e) {
22 e.printStackTrace();
23 }
24
25 System.out.println("task over time:" + new Date());
26 }
27
28 } 继承TimerTask的自定义类MyTimerTask：
1 package cn.test.timer;
2
3 import java.io.*;
4 import java.text.SimpleDateFormat;
5 import java.util.Date;
6 import java.util.TimerTask;
7
8 import org.apache.log4j.Logger;
9
10 public class MyTimerTask extends TimerTask {
11 private final Logger logger = Logger.getLogger(MyTimerTask.class.getName());
12 private final SimpleDateFormat fullDateFormat = new SimpleDateFormat("yyyyMMdd HH:mm:ss");
13 private final SimpleDateFormat shortDateFormat = new SimpleDateFormat("yyyy-MM-dd");
14
15 @Override
16 public void run() {
17 // TODO Auto-generated method stub
18 System.out.println("task run time:" + new Date());
19
20 logger.info("start.............................");
21
22 String fileDir = "D:/Java_Study/windowsservice/JavaService_2_0_10-amd64/log/";
23 String filePath = fileDir + shortDateFormat.format(new Date()) + ".txt";
24
25 File logDirector = new File(fileDir);
26 File logFile = new File(filePath);
27
28 try {
29 if (!logDirector.exists()) {
30 logDirector.createNewFile();
31 }
32 if (!logFile.exists()) {
33 logFile.createNewFile();
34 }
35 FileWriter writer = new FileWriter(filePath, true);
36
37 writer.write(fullDateFormat.format(new Date())+"\r\n");
38 writer.close();
39
40 } catch (final IOException e) {
41 e.printStackTrace();
42 logger.error("error:\r\n" + e.getMessage() + "\r\n" + e.getStackTrace());
43 } finally {
44
45 }
46 logger.info("end.............................");
47 }
48
49 } 运行起来后，Console上输出信息为：
task over time:Fri Apr 22 23:53:15 CST 2016
task run time:Fri Apr 22 23:53:15 CST 2016
0 INFO 2016-04-22 23:53:15 cn.test.timer.MyTimerTask start.............................
1 INFO 2016-04-22 23:53:15 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:17 CST 2016
1998 INFO 2016-04-22 23:53:17 cn.test.timer.MyTimerTask start.............................
2000 INFO 2016-04-22 23:53:17 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:19 CST 2016
3998 INFO 2016-04-22 23:53:19 cn.test.timer.MyTimerTask start.............................
4001 INFO 2016-04-22 23:53:19 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:21 CST 2016
5998 INFO 2016-04-22 23:53:21 cn.test.timer.MyTimerTask start.............................
6001 INFO 2016-04-22 23:53:21 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:23 CST 2016
7998 INFO 2016-04-22 23:53:23 cn.test.timer.MyTimerTask start.............................
task over time:Fri Apr 22 23:53:23 CST 2016
8000 INFO 2016-04-22 23:53:23 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:25 CST 2016
9998 INFO 2016-04-22 23:53:25 cn.test.timer.MyTimerTask start.............................
9999 INFO 2016-04-22 23:53:25 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:27 CST 2016
11999 INFO 2016-04-22 23:53:27 cn.test.timer.MyTimerTask start.............................
12000 INFO 2016-04-22 23:53:27 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:29 CST 2016
13999 INFO 2016-04-22 23:53:29 cn.test.timer.MyTimerTask start.............................
14001 INFO 2016-04-22 23:53:29 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:31 CST 2016
15999 INFO 2016-04-22 23:53:31 cn.test.timer.MyTimerTask start.............................
16000 INFO 2016-04-22 23:53:31 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:33 CST 2016
17999 INFO 2016-04-22 23:53:33 cn.test.timer.MyTimerTask start.............................
18001 INFO 2016-04-22 23:53:33 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:35 CST 2016
19999 INFO 2016-04-22 23:53:35 cn.test.timer.MyTimerTask start.............................
20001 INFO 2016-04-22 23:53:35 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:37 CST 2016
21999 INFO 2016-04-22 23:53:37 cn.test.timer.MyTimerTask start.............................
22001 INFO 2016-04-22 23:53:37 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:39 CST 2016
23999 INFO 2016-04-22 23:53:39 cn.test.timer.MyTimerTask start.............................
24003 INFO 2016-04-22 23:53:39 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:41 CST 2016
25999 INFO 2016-04-22 23:53:41 cn.test.timer.MyTimerTask start.............................
26001 INFO 2016-04-22 23:53:41 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:43 CST 2016
27999 INFO 2016-04-22 23:53:43 cn.test.timer.MyTimerTask start.............................
28002 INFO 2016-04-22 23:53:43 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:45 CST 2016
30000 INFO 2016-04-22 23:53:45 cn.test.timer.MyTimerTask start.............................
30002 INFO 2016-04-22 23:53:45 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:47 CST 2016
32000 INFO 2016-04-22 23:53:47 cn.test.timer.MyTimerTask start.............................
32004 INFO 2016-04-22 23:53:47 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:49 CST 2016
34000 INFO 2016-04-22 23:53:49 cn.test.timer.MyTimerTask start.............................
34002 INFO 2016-04-22 23:53:49 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:51 CST 2016
36000 INFO 2016-04-22 23:53:51 cn.test.timer.MyTimerTask start.............................
36002 INFO 2016-04-22 23:53:51 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:53 CST 2016
38000 INFO 2016-04-22 23:53:53 cn.test.timer.MyTimerTask start.............................
38001 INFO 2016-04-22 23:53:53 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:55 CST 2016
40000 INFO 2016-04-22 23:53:55 cn.test.timer.MyTimerTask start.............................
40002 INFO 2016-04-22 23:53:55 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:57 CST 2016
42000 INFO 2016-04-22 23:53:57 cn.test.timer.MyTimerTask start.............................
42002 INFO 2016-04-22 23:53:57 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:53:59 CST 2016
44000 INFO 2016-04-22 23:53:59 cn.test.timer.MyTimerTask start.............................
44004 INFO 2016-04-22 23:53:59 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:54:01 CST 2016
46000 INFO 2016-04-22 23:54:01 cn.test.timer.MyTimerTask start.............................
46001 INFO 2016-04-22 23:54:01 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:54:03 CST 2016
48001 INFO 2016-04-22 23:54:03 cn.test.timer.MyTimerTask start.............................
48003 INFO 2016-04-22 23:54:03 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:54:05 CST 2016
50001 INFO 2016-04-22 23:54:05 cn.test.timer.MyTimerTask start.............................
50002 INFO 2016-04-22 23:54:05 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:54:07 CST 2016
52001 INFO 2016-04-22 23:54:07 cn.test.timer.MyTimerTask start.............................
52003 INFO 2016-04-22 23:54:07 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:54:09 CST 2016
54001 INFO 2016-04-22 23:54:09 cn.test.timer.MyTimerTask start.............................
54003 INFO 2016-04-22 23:54:09 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:54:11 CST 2016
56001 INFO 2016-04-22 23:54:11 cn.test.timer.MyTimerTask start.............................
56002 INFO 2016-04-22 23:54:11 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:54:13 CST 2016
58001 INFO 2016-04-22 23:54:13 cn.test.timer.MyTimerTask start.............................
58003 INFO 2016-04-22 23:54:13 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:54:15 CST 2016
60001 INFO 2016-04-22 23:54:15 cn.test.timer.MyTimerTask start.............................
60003 INFO 2016-04-22 23:54:15 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:54:17 CST 2016
62001 INFO 2016-04-22 23:54:17 cn.test.timer.MyTimerTask start.............................
62003 INFO 2016-04-22 23:54:17 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:54:19 CST 2016
64002 INFO 2016-04-22 23:54:19 cn.test.timer.MyTimerTask start.............................
64004 INFO 2016-04-22 23:54:19 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:54:21 CST 2016
66002 INFO 2016-04-22 23:54:21 cn.test.timer.MyTimerTask start.............................
66004 INFO 2016-04-22 23:54:21 cn.test.timer.MyTimerTask end.............................
task run time:Fri Apr 22 23:54:23 CST 2016
68002 INFO 2016-04-22 23:54:23 cn.test.timer.MyTimerTask start.............................
68003 INFO 2016-04-22 23:54:23 cn.test.timer.MyTimerTask end.............................
