Я читаю один файл Excel в моей локальной системе. Я использую POI jar версии 3.7, но получаю ошибку Недопустимая подпись заголовка; прочитайте -2300849302551019537 или в шестнадцатеричном формате 0xE011BDBFEFBDBFEF, ожидаемо -2226271756974174256 или в шестнадцатеричном 0xE11AB1A1E011CFD0.

Открытие xls файла в Excel работает нормально.

Кодовый блок, где это происходит: кто-нибудь идея?

/**
 * create a new HeaderBlockReader from an InputStream
 *
 * @param stream the source InputStream
 *
 * @exception IOException on errors or bad data
 */
public HeaderBlockReader(InputStream stream) throws IOException {
    // At this point, we don't know how big our
    //  block sizes are
    // So, read the first 32 bytes to check, then
    //  read the rest of the block
    byte[] blockStart = new byte[32];
    int bsCount = IOUtils.readFully(stream, blockStart);
    if(bsCount != 32) {
        throw alertShortRead(bsCount, 32);
    }

    // verify signature
    long signature = LittleEndian.getLong(blockStart, _signature_offset);

    if (signature != _signature) {
        // Is it one of the usual suspects?
        byte[] OOXML_FILE_HEADER = POIFSConstants.OOXML_FILE_HEADER;
        if(blockStart[0] == OOXML_FILE_HEADER[0] &&
            blockStart[1] == OOXML_FILE_HEADER[1] &&
            blockStart[2] == OOXML_FILE_HEADER[2] &&
            blockStart[3] == OOXML_FILE_HEADER[3]) {
            throw new OfficeXmlFileException("The supplied data appears to be in the Office 2007+ XML. You are calling the part of POI that deals with OLE2 Office Documents. You need to call a different part of POI to process this data (eg XSSF instead of HSSF)");
        }
        if ((signature & 0xFF8FFFFFFFFFFFFFL) == 0x0010000200040009L) {
            // BIFF2 raw stream starts with BOF (sid=0x0009, size=0x0004, data=0x00t0)
            throw new IllegalArgumentException("The supplied data appears to be in BIFF2 format.  "
                    + "POI only supports BIFF8 format");
        }

        // Give a generic error
        throw new IOException("Invalid header signature; read "
                              + longToHex(signature) + ", expected "
                              + longToHex(_signature));
    }