QXmlStreamWriter and cyrillic

在windows中通过QXmlStreamWriter编写XML文件时，我有编码问题，我该如何解决?使用stream.setCodec("UTF-8")或"windows-1251"没有帮助。

QFile *file = new QFile(filename);
if (file->open(QIODevice::WriteOnly | QIODevice::Text))
         {
         QXmlStreamWriter stream(file);
         stream.setAutoFormatting(true);
         stream.writeStartDocument();
         stream.writeStartElement("СЕКЦИЯ"); // start root section
            stream.writeStartElement("FIELD");
            stream.writeAttribute("name", "Имя");
            stream.writeAttribute("value", "Иван");
            stream.writeEndElement();
         stream.writeEndElement(); // END СЕКЦИЯ
         file->close();
}