我心飛翔
慢慢的度過

隨筆-200 評論-148 文章-15 trackbacks-0

I?have?to?say?this?is?a?very?poor?written?OOP?code.?No?wonder?most?people?are?doing?Micrsoft?ASP(because?it?is?not?OOP?at?all!).?Here?is?the?version?I?cooked?for?about?10-15?min?of?my?time.

public?class?DirCopyUtil?{

????public?static?void?copy(File?src,?File?dest)?throws?IOException?{
????????getCopyable(src).copy(dest);
????}

????//this?is?the?factory?pattern.
????public?static?Copyable?getCopyable(File?src)?{
????????//if?the?source?if?file?then?return?a?file?copier
????????if?(src.isFile())?{
????????????return?new?FileCopier(src);
????????}
????????/*else?it?has?to?be?a?directory?copier,?we?could?also?enhance?it?to?be?other?type?of?copier?such?as?httpcopier?etc...*/
????????return?new?DirCopier(src);

????}

????interface?Copyable?{
????????void?copy(File?dest)?throws?IOException;
????}

????static?class?DirCopier?implements?Copyable?{
????????File?srcDir;

????????public?DirCopier(File?srcDir)?{
????????????if?(!srcDir.isDirectory())?{
????????????????throw?new?IllegalArgumentException("passed?in?paremter?has?to?be?directory"?+?srcDir);
????????????}
????????????this.srcDir?=?srcDir;
????????}
????????/**
?????????*?copy?current?directory?content?under?'destRoot'?directory
?????????*?@param?destRoot??the?destination?root?directory,?all?the?file?and?sub?directory?will?be?copied?under?this
?????????*?destRoot?directory,?if?destRoot?doesn't?exist,?this?will?create?the?directory.
?????????*?@throws?IOException
?????????*/
????????public?void?copy(File?destRoot)?throws?IOException?{
//??????????1)?if?destRoot?is?not?exist?it?will?create?it
????????????if?(!destRoot.exists())?{
????????????????if?(!destRoot.mkdirs())?{
????????????????????throw?new?IOException("unable?to?create?dir:"?+?destRoot);
????????????????}
????????????}
????????????if?(!destRoot.isDirectory())?{
????????????????throw?new?IllegalArgumentException("passed?in?paremter?has?to?be?directory"?+?destRoot);
????????????}
????????????File[]?dirContents?=?srcDir.listFiles();
????????????//we?know?dirContents?can?not?be?null?since?only?file?will?return?null,?so?no?need?to?check?null
????????????for?(int?i?=?0;?i?<?dirContents.length;?i++)?{
????????????????File?_srcFile?=?dirContents[i];
????????????????String?_srcPath?=?_srcFile.getCanonicalPath();
????????????????/*now?I?need?to?get?the?relative?path
????????????????question?here?is?c:\abc\?cannonicalpath?return??"c:\abc"?or?"c:\\abc\\"??the?answer?is?"c:\\abc"
????????????????so?the?following?statement?never?executed,?but?I?am?just?playing?safe?here?since?I?don't?know?if
????????????????every?JVM?implementation?will?behave?the?same?as?my?XP?machine?and?Sun?1.4?*/
????????????????if?(_srcPath.endsWith(File.separator))?{?//the?endswith?has?subtle?bug,?but?it?should?not?matter
????????????????????_srcPath?=?_srcPath.substring(0,?_srcPath.length()?-?File.separator.length());
????????????????}
????????????????File?dest?=?new?File(destRoot,?_srcPath.substring(_srcPath.lastIndexOf(File.separatorChar)?+?1));
????????????????//here?I?wire?back?to?the?factory?method.
????????????????getCopyable(dirContents[i]).copy(dest);
????????????}
????????}

????}

????static?class?FileCopier?implements?Copyable?{
????????File?src;

????????public?FileCopier(File?src)?{
????????????if?(!src.isFile())?{
????????????????throw?new?IllegalArgumentException("passed?in?paremter?has?to?be?file"?+?src);
????????????}
????????????this.src?=?src;
????????}

????????/**
?????????*?Copy?the?current?file?to?the?dest?file,?if?the?dest?file?doesn't?exist?it?will?be?created.
?????????*?@param?dest??the?destination?file
?????????*?@throws?IOException
?????????*/
????????public?void?copy(File?dest)?throws?IOException?{
????????????if?(!dest.exists())?{
????????????????dest.createNewFile();
????????????}
????????????if?(!dest.isFile())?{
????????????????throw?new?IllegalArgumentException("passed?in?paremter?has?to?be?file"?+?dest);
????????????}

????????????//do?straight?file?copy
????????????FileInputStream?in?=?new?FileInputStream(src);
????????????FileOutputStream?out?=?new?FileOutputStream(dest);
????????????byte[]?buffer?=?new?byte[1024?*?4];?//4k?buffer
????????????int?len?=?0;
????????????while?((len?=?in.read(buffer,?0,?buffer.length))?>?0)?{
????????????????out.write(buffer,?0,?len);
????????????}
????????????in.close();
????????????out.close();
????????}
????}
}

posted on 2008-07-22 17:01 無聲閱讀(381) 評論(0) 編輯收藏所屬分類: 職場生活

新用戶注冊刷新評論列表


只有注冊用戶登錄后才能發表評論。




網站導航: 博客園 IT新聞 Chat2DB C++博客博問管理
相關文章: kettle ETL java 調用 kettle job 或 transfer 轉win8 64位+Oracle 11g 64位下使用PL/SQL Developer 的解決辦法 Java 獲取當前日期和時間清除目錄下的SVN信息 Linux下使用gzip壓縮與解壓文件 Linux 下ftp自動登錄 struts1.x防止重復提交 C#正則表達式小結 jbpm4 java.lang.LinkageError: loader constraint violation 包沖突 c#web定時任務

道可道非常道，名可名非常名

<

2008年7月

>

日

一

二

三

四

五

六

29

30

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

1

2

3

4

5

6

7

8

9

常用鏈接

留言簿(5)

我參與的團隊

JLive開發團隊(0/0)

隨筆分類(174)

隨筆檔案(200)

文章分類(20)

文章檔案(15)

收藏夾

共享代碼

開源網站

ajax中國
finereport
hibernate
Java開源大全
java技術論壇
java論壇
java論壇
用戶名parable
linux伊甸園
luanyong
oracle下載
oracle資源
Struts插件
這個插件功能強大,包括JSF,struts,hibernate等
unix論壇
開源力量社區
源程序網站
資料中心
資源網站
parable

常用鏈接

留言簿(5)

我參與的團隊

隨筆分類(174)

隨筆檔案(200)

文章分類(20)

文章檔案(15)

收藏夾

開源網站

朋友博客

最新隨筆

搜索

最新評論

閱讀排行榜

評論排行榜