Security.java 文件源码

public String createSha1(File file) throws TechnicalException {
    try (InputStream fis = new FileInputStream(file);) {
        MessageDigest sha1 = MessageDigest.getInstance("SHA-1");
        int n = 0;
        byte[] buffer = new byte[8192];
        while (n != -1) {
            n = fis.read(buffer);
            if (n > 0) {
                sha1.update(buffer, 0, n);
            }
        }
        return new HexBinaryAdapter().marshal(sha1.digest());
    } catch (NoSuchAlgorithmException | IOException e) {
        throw new TechnicalException(Messages.getMessage(TechnicalException.TECHNICAL_ERROR_MESSAGE_CHECKSUM_IO_EXCEPTION), e);
    }
}