- /* 方法1 */
- QFile theFile(fileNamePath);
- theFile.open(QIODevice::ReadOnly);
- QByteArray ba = QCryptographicHash::hash(theFile.readAll(), QCryptographicHash::Md5);
- theFile.close();
- qDebug() << ba.toHex().constData();
- /* 方法2 */
- /*
- * 获取文件md5值
- */
- QByteArray MainWindow::getFileMd5(QString filePath)
- {
- QFile localFile(filePath);
- if (!localFile.open(QFile::ReadOnly))
- {
- qDebug() << "file open error.";
- return 0;
- }
- QCryptographicHash ch(QCryptographicHash::Md5);
- quint64 totalBytes = 0;
- quint64 bytesWritten = 0;
- quint64 bytesToWrite = 0;
- quint64 loadSize = 1024 * 4;
- QByteArray buf;
- totalBytes = localFile.size();
- bytesToWrite = totalBytes;
- while (1)
- {
- if(bytesToWrite > 0)
- {
- buf = localFile.read(qMin(bytesToWrite, loadSize));
- ch.addData(buf);
- bytesWritten += buf.length();
- bytesToWrite -= buf.length();
- buf.resize(0);
- }
- else
- {
- break;
- }
- if(bytesWritten == totalBytes)
- {
- break;
- }
- }
- localFile.close();
- QByteArray md5 = ch.result();
- return md5;
- }
http://blog.csdn.net/emdfans/article/details/23871741