Qt读写文件简单示例

void testReadWriteFile()
{
    //当前程序所在文件夹
    QString dirPath = QCoreApplication::applicationDirPath();
    QString path = QDir::cleanPath(dirPath + QDir::separator() + "test.txt");
    qDebug() << "File path: " << path;

    //写文件
    {
        QString text = "Hello,世界！";
        QByteArray data = text.toUtf8();

        QFile file(path);
        bool ret = file.open(QFile::WriteOnly);
        file.write(data);
        file.close();

        qDebug() << "Write file: " << text;
    }

    //读文件
    {
        QFile file(path);
        bool ret = file.open(QFile::ReadOnly);
        QByteArray data = file.readAll();
        file.close();

        QString text = QString::fromUtf8(data);
        qDebug() << "Read file: " << text;
    }
}