疯狂Java讲义习题11.3

题目描述： 实现一个工具类，该工具可实现copy功能，若被copy的对象是文件，程序将制定文件复制到制定目录下，如过被copy对象是目录，程序应将该目录及其目录下的所有文件复制到指令目录下。  代码如下：

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import java.io.*; public class cpft {     public static void copyFile(String dst,String src) throws IOException     {         FileOutputStream fos = null;         FileInputStream fis = null;                 fos = new FileOutputStream(dst+"\\"+src.substring(src.lastIndexOf('\\')+1));             fis = new FileInputStream(src);             int hasRead = 0;             byte[] bbuf = new byte[1024];             while ((hasRead = fis.read(bbuf)) > 0)             {                                  fos.write(bbuf,0,hasRead);             }              }     public static void copy(String dst,String src) throws IOException     {         File newFile = new File(src);         File[] fileList = newFile.listFiles();         //File dstFile = new File(dst+"//"+newFile.getName());         if (newFile.isFile())         {                          copyFile(dst,src);         }         else         {             File dstFile = new File(dst+"//"+newFile.getName());             if (!dstFile.exists())             {                 dstFile.mkdirs();             }             for (File file:fileList)             {                 if (file.isFile())                         copyFile(dstFile.getAbsolutePath(),file.getAbsolutePath());                 else                         copy(dstFile.getAbsolutePath(),file.getAbsolutePath());             }                     }     }     public static void main(String[] args) throws IOException     {                  String src = "F:\\paper";         String dst = "F:\\冰点文库";         copy(dst,src);         System.out.println("finished Copy");     } } 运行结果：（完成复制） finished Copy <script>window._bd_share_config={"common":{"bdSnsKey":{},"bdText":"","bdMini":"2","bdMiniList":false,"bdPic":"","bdStyle":"0","bdSize":"16"},"share":{}};with(document)0[(getElementsByTagName('head')[0]||body).appendChild(createElement('script')).src='http://bdimg.share.baidu.com/static/api/js/share.js?v=89860593.js?cdnversion='+~(-new Date()/36e5)];</script> 阅读(65) | 评论(0) | 转发(0) | 0

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