需要做一个简单的定期数据备份，开始想到是 quatz ，查了些资料发现 quatz 功能比较强大，而自己的需求很简单，能定期备份数据就行。
查到了util.timer何timertask两个类，可以定期执行任务。而数据备份做一个读取文件和文件夹的就可以。如下：
1.数据备份
1
package copy;
2
3import java.io.*;
4
5
public class CopyDirectory 
{
6
// 源文件夹
7 static String url1 = "test";
8 // 目标文件夹
9 static String url2 = "F:/mirc1/";
10
11
12
public static void copy ()throws IOException{
13
14 (new File(url2)).mkdirs();
15 File[] file = (new File(url1)).listFiles();
16 for (int i = 0; i < file.length; i++) {
17 if (file[i].isFile()) {
18 copyFile(file[i], new File(url2 + file[i].getName()));
19
}
20 if (file[i].isDirectory()) {
21 String sourceDir = url1 + File.separator + file[i].getName();
22 String targetDir = url2 + File.separator + file[i].getName();
23 copyDirectiory(sourceDir, targetDir);
24 }
25 }
26 }
27
28 public static void copyFile(File sourceFile, File targetFile)
29 throws IOException {
30 FileInputStream input = new FileInputStream(sourceFile);
31 BufferedInputStream inBuff = new BufferedInputStream(input);
32
33 FileOutputStream output = new FileOutputStream(targetFile);
34 BufferedOutputStream outBuff = new BufferedOutputStream(output);
35
36 byte[] b = new byte[1024 * 5];
37 int len;
38 while ((len = inBuff.read(b)) != -1) {
39 outBuff.write(b, 0, len);
40 }
41 outBuff.flush();
42
43 inBuff.close();
44 outBuff.close();
45 output.close();
46 input.close();
47 }
48
49 public static void copyDirectiory(String sourceDir, String targetDir)
50 throws IOException {
51 (new File(targetDir)).mkdirs();
52 File[] file = (new File(sourceDir)).listFiles();
53 for (int i = 0; i < file.length; i++) {
54 if (file[i].isFile()) {
55 File sourceFile = file[i];
56 File targetFile = new File(new File(targetDir)
57 .getAbsolutePath()
58 + File.separator + file[i].getName());
59 copyFile(sourceFile, targetFile);
60 }
61 if (file[i].isDirectory()) {
62 String dir1 = sourceDir + "/" + file[i].getName();
63 String dir2 = targetDir + "/" + file[i].getName();
64 copyDirectiory(dir1, dir2);
65 }
66 }
67 }
68
}
69
2 . 设定数据备份工作执行时间间隔
1package copy;
2
3import java.util.Date;
4import java.util.Timer;
5
6public class CopyWork {
7 public static void main(String[] args) {
8 Date date = new Date();
9 Timer timer = new Timer();
10 timer.schedule(new Worker(), new Date(), 60000);
11 }
12
13}
14
3.测试
1package copy;
2
3import java.io.IOException;
4import java.util.TimerTask;
5
6public class Worker extends TimerTask{
7
8 @Override
9 public void run() {
10 try {
11 CopyDirectory.copy();
12 } catch (IOException e) {
13
14 e.printStackTrace();
15 }
16
17 }
18
19}
20