把Ｃ盘中的一个多层文件夹拷贝到D盘中 黑马程序员

---------------------- <a href="http://www.itheima.com"target="blank">asp.net+Unity开发</a>、<a href="http://www.itheima.com"target="blank">.Net培训</a>、期待与您交流！ ----------------------class CopyWenJianJia{        public static void main(String[] args)throws Exception        {                //源文件夹                String yuan = "C://nimeizide";                //目的地                String mudi = "D://nimeizide";                //建立目标文件夹                (new File(mudi)).mkdirs();                //获取源文件夹当下的文件或目录                File[] files = (new File(yuan)).listFiles();                for(File file : files)                {                        if(file.isDirectory())                        {                                String yuanDir = yuan + "//" + file.getName();                                String mudiDir = mudi + "//" + file.getName();                                //复制目录                                copyDir(yuanDir, mudiDir);                        }                        else                        {                                copyFile(file, new File(mudi + "//" + file.getName()));                        }                }        }        //复制文件夹        public static void copyDir(String yuanDir, String mudiDir)throws Exception        {                (new File(mudiDir)).mkdirs();                File[] files = (new File(yuanDir)).listFiles();                for(File file : files)                {                        if(file.isFile())                        {                                File yuanFile = file;//源文件                                File mudiFile = new File(new File(mudiDir).getAbsolutePath() + "//" + file.getName());                                copyFile(yuanFile, mudiFile);                        }                        else                        {                                String yuanJia = yuanDir + "//" + file.getName();                                String mudiJia = mudiDir + "//" + file.getName();                                copyDir(yuanJia, mudiJia);                        }                }        }        //复制文件        public static void copyFile(File yuanFile, File mudiFile)throws Exception        {                BufferedInputStream buis = new BufferedInputStream(new FileInputStream(yuanFile.getAbsoluteFile()));                BufferedOutputStream buos = new BufferedOutputStream(new FileOutputStream(mudiFile.getAbsoluteFile()));                byte[] buf = new byte[1024];                int len;                while((len = buis.read(buf)) != -1)                {                        buos.write(buf, 0, len);                        buos.flush();                }                buis.close();                buos.close();        }}---------------------- <a href="http://www.itheima.com"target="blank">ASP.Net+Unity开发</a>、<a href="http://www.itheima.com"target="blank">.Net培训</a>、期待与您交流！ ----------------------