用java兑现文件copy功能

用java实现文件copy功能

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public class CopyFileUtil {
	public static void main(String[] args) {
		System.out.println("输入文件路径：");
		copyFile();
	}
	public static void copyFile() {
		BufferedReader reader = new BufferedReader(new InputStreamReader(
				System.in));
		String line;
		try {
			while ((line = reader.readLine()) != null) {
				File f = new File(line);
				if (f.isFile() && f.exists()) {
					String filename = f.getName();
					FileInputStream in = new FileInputStream(f);
					FileOutputStream out = new FileOutputStream(new File("E:\\"
							+ filename));
					byte[] buffer = new byte[1024];
					int len = -1;
					while ((len = in.read(buffer)) != -1) {
						out.write(buffer, 0, len);
					}
					in.close();
					out.close();
					System.out.println("拷贝文件成功！ 程序退出");
					break;
				} else {
					System.out.println("文件不存在或输入的不是文件是目录！请重新输入");
					continue;
				}
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

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