求助： 用java 来实现文件复制 ！

Question

/**
     * Get the all the filenames with absolute path
     * All the files fullpath will be store in vector
     * @return the path name
     */
    public static void getFilesRecursive(File dir,Vector v)
    {
        if(dir.isDirectory())
        {
            String path = dir.getAbsolutePath();
            String sub[] = dir.list();
            for(int i = 0;i<sub.length;i++)
            {
                File f = new File(path + File.separator + sub[i]);
                getFilesRecursive(f,v);
            }
        }
        else
        {            String tmp = dir.getAbsolutePath();
            v.add(tmp);
            //System.out.println(tmp);
        }    }将返回的Vector,每个Object cast为String,再用IO读出再写往其它地方即可

Answer 1

byte buffer[]; //共享内存
try {
         String srcFileName = "abc.dat";
         File srcFile = new File(srcFileName);
         buffer[] = new byte[(int)srcFile.length()];
         BufferedInputStream input = new BufferedInputStream(new FileInputStream(srcFileName.getName()));
         input.read(buffer,0,buffer.length);
         input.close();
 
String dstFileName = "abc_bak.dat";
File dstFile = new File(dstFileName);
         BufferedOutputStream output = new BufferedOutputStream(new FileOutputStream(dstFilename.getName()));
         output.write(buffer,0,buffer.length);
         output.flush();
         output.close();      } catch(Exception e){
         e.printStackTrace();
      }

Answer 2

http://www.csdn.net/Develop/read_article.asp?id=19064

Answer 3

看上面程序：buffer.length 即文件大小