文件的复制，使用BufferedReader和BufferedWriter、BufferedInputStream和BufferedOutputStream类对文件进行复制。

可以使用以下代码来使用BufferedReader和BufferedWriter类对文件进行复制：

try (BufferedReader reader = new BufferedReader(new FileReader("source.txt"));
     BufferedWriter writer = new BufferedWriter(new FileWriter("destination.txt"))) {
     String line;
     while ((line = reader.readLine()) != null) {
         writer.write(line);
         writer.newLine();
     }
} catch (IOException e) {
     e.printStackTrace();
}

使用BufferedInputStream和BufferedOutputStream类对文件进行复制的代码如下：

try (BufferedInputStream bis = new BufferedInputStream(new FileInputStream("source.txt"));
     BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("destination.txt"))) {
     byte[] buffer = new byte[1024];
     int bytesRead;
     while ((bytesRead = bis.read(buffer)) != -1) {
         bos.write(buffer, 0, bytesRead);
     }
} catch (IOException e) {
     e.printStackTrace();
}

这些代码使用了缓冲流来提高文件复制的效率，同时使用了try-with-resources语句来自动关闭流。