图片与二进制数据互转、图片数据转Base64

int ConvertImageFileToChar( QString strImageFile, char *pPlateImageChar)

{      

QFile file(strImageFile);      

if (!file.exists()) {      

return -1;      

}      

QByteArray arrayData;      

if (file.open(QIODevice::ReadOnly))      

{      

arrayData = file.readAll();      

file.close();      

}      

else {      

return -1;      

}      

if (arrayData.size() <= 0) {      

return -1;      

}      

int imageLen = arrayData.size();      

if (pPlateImageChar != NULL) {      

memcpy(pPlateImageChar, arrayData.data(), imageLen);      

}      

return imageLen;      

}      

void WriteImageData(char* pImageData, int iDataLen, QString strFileName)

{      

QString strLogPath = QCoreApplication::applicationDirPath() + "/" + "Log" + "/" + "JpgFile";      

QDir dir(strLogPath);      

if (!dir.exists()) {      

dir.mkpath(strLogPath);      

}      

strFileName = strLogPath + "/"  + strFileName + ".jpg";      

QImage image;      

image.loadFromData(reinterpret_cast<unsigned char*>(pImageData), iDataLen);      

image.save(strFileName);      

}      

int ConvertImageFileToBase64(QStringList strImageFileList, QStringList &strImageBase64List)

{      

for (int i = 0; i < strImageFileList.count(); i++)      

{      

QString strImageBase64 = "";      

QFile file(strImageFileList.at(i));      

if (!file.exists())      

{      

strImageBase64List << strImageBase64;      

continue;      

}      

if (file.open(QIODevice::ReadOnly))      

{      

QByteArray fileByteArray = file.readAll();      

if (!fileByteArray.isEmpty()) {      

strImageBase64 = QString(fileByteArray.toBase64());      

}      

file.close();      

}      

strImageBase64List << strImageBase64;      

}      

return 0;      

}      

int ConvertImageDataToBase64(QStringList strImageFileList, QStringList &strImageBase64List)

{      

for (int i = 0; i < strImageFileList.count(); i++)      

{      

QString strImageBase64 = "";      

if (!QFile::exists(QString(strImageFileList.at(i))))      

{      

strImageBase64List << strImageBase64;      

continue;      

}      

QImage image = QImage(strImageFileList.at(i));      

if (!image.isNull())      

{      

QByteArray arrayData;      

QBuffer buffer(&arrayData);      

buffer.open(QIODevice::WriteOnly);      

image.save(&buffer,"JPG");      

if (!arrayData.isEmpty())      

{      

QByteArray arrayBase64Data = arrayData.toBase64();      

strImageBase64 = QString(arrayBase64Data);      

}      

buffer.close();      

}      

strImageBase64List << strImageBase64;      

}      

return 0;      

}