Utf-8 转 GBK

QTextCodec *gbk = QTextCodec::codecForName("gb18030");
 QTextCodec *utf8 = QTextCodec::codecForName("utf-8");
 QTextCodec::setCodecForTr(gbk);
 QTextCodec::setCodecForLocale(gbk);
// QString utfStr = QObject::trUtf8( tr("webservice 读取完成").toUtf8()); //utf-8
 QString utfStr = QObject::trUtf8(pp); //utf-8
// QString gbkStr = QObject::tr("中文"); // gbk
 QString utf2gbk = gbk->toUnicode(utfStr.toLocal8Bit()); // utf8 conver gbk
// qDebug() << utf2gbk;
 gloinfo = utf2gbk;
 qDebug() << gloinfo;
// QString gbk2utf1 = utf8->toUnicode(utf2gbk.toUtf8()); // gbk convert utf8
// QString g2u = gbk->toUnicode(gbk->fromUnicode(readStr)); // gbk convert utf8