nio按行读取16进制文件

要按行读取16进制文件，您可以使用Java的NIO（New IO）库来实现。首先，您需要导入所需的类，如引用中所示。然后，您可以使用以下代码来实现按行读取16进制文件的操作：

public static void main(String[] args) {
    File file = new File("file.cht"); // 替换成您要读取的文件路径

    try (RandomAccessFile raf = new RandomAccessFile(file, "r");
         FileChannel channel = raf.getChannel()) {

        int bufferSize = 102400;
        ByteBuffer buffer = ByteBuffer.allocate(bufferSize);

        while (channel.read(buffer) != -1) {
            buffer.flip();
            while (buffer.hasRemaining()) {
                byte[] lineBuffer = new byte[16];
                int bytesToRead = Math.min(buffer.remaining(), lineBuffer.length);
                buffer.get(lineBuffer, 0, bytesToRead);

                StringBuilder hexLine = new StringBuilder();
                for (byte b : lineBuffer) {
                    hexLine.append(String.format("%02X ", b));
                }

                System.out.println(hexLine.toString());
            }
            buffer.clear();
        }
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

这段代码通过使用`RandomAccessFile`和`FileChannel`来读取文件的内容，并使用`ByteBuffer`来缓冲读取的数据。然后，它会按照每行16个字节的大小，将每一行的字节转换为16进制字符串，并打印出来。

请注意，您需要将代码中的`"file.cht"`替换为您要读取的文件的实际路径。另外，您还可以根据需要修改缓冲区大小和输出方式。

希望这可以帮助到您！<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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