复制文件

public static void copy(File file, File dest) throws FileNotFoundException {
		if (!file.exists()) {
			throw new FileNotFoundException(file.getName() + " not found");
		}

		if (file.isDirectory()) {
			dest.mkdirs();
			return;
		}

		if (!file.isFile()) {
			return;
		}

		FileInputStream in = null;
		FileOutputStream out = null;
		try {
			in = new FileInputStream(file);
			out = new FileOutputStream(dest);
			byte[] buffer = new byte[1024];
			int count = 0;
			while ((count = in.read(buffer)) != -1) {
				if (!isCanceled)
					out.write(buffer, 0, count);
				else 
					break;
			}
			in.close();
			out.close();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				if (in != null) {
					in.close();
				}
				if (out != null) {
					out.flush();
					out.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}