将以下函数：【 public static String readBinaryFileFile file try FileInputStream fis = new FileInputStreamfile byte fileData = new byteint filelength; fisreadfileData;

修改后的函数如下：

public static String readBinaryFile(File file) {
    try (RandomAccessFile randomAccessFile = new RandomAccessFile(file, "r")) {
        long length = randomAccessFile.length();
        ByteBuffer buffer = ByteBuffer.allocate((int) length);
        randomAccessFile.getChannel().read(buffer);
        buffer.flip();

        StringBuilder stringBuilder = new StringBuilder();
        while (buffer.hasRemaining()) {
            stringBuilder.append(buffer.get()).append(", ");
        }
        String result = stringBuilder.toString();
        result = "[" + result.substring(0, result.length() - 2) + "]";//del /t/n
        byte[] bt = result.getBytes();
        String s = encodeHexString(bt);
        s = "[" + s.substring(0, s.length() - 2) + "]";
        System.out.println(s);
        return s;
    } catch (IOException e) {
        e.printStackTrace();
    }
    return "";
}

其中，findSignatureBlock方法没有提供，你需要自行实现。另外，encodeHexString方法也需要自行实现，可以使用javax.xml.bind.DatatypeConverter.printHexBinary方法替代