1.文件夾的拷貝

public void copy(File src, File dest) throws IOException {if (dest.isFile()) {throw new RuntimeException(dest + '不是文件夾');}File file = new File(dest.getPath() + '/' + src.getName());if (src.isFile()) {FileInputStream fis = new FileInputStream(src);BufferedInputStream bis = new BufferedInputStream(fis);FileOutputStream fos = new FileOutputStream(file);BufferedOutputStream bos = new BufferedOutputStream(fos);byte[] bytes = new byte[1024];int len;while ((len = bis.read(bytes)) != -1) {bos.write(bytes, 0, len);}bis.close();fis.close();bos.close();fos.close();} else if(src.isDirectory()){file.mkdir();File[] files = src.listFiles();for (File file2 : files) {copy(file2, dest);}}}

2. 刪除整個文件夾：

public void delete(File dir) {if (dir.isDirectory()) {File[] files = dir.listFiles();for (File file : files) {delete(file);}}dir.delete();}

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