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QTextCodec *codec=QTextCodec::codecForName(”gbk”);
QTextCodec *codec=QTextCodec::codecForName(”utf8″);
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QTextCodec::setCodecForCStrings(codec);
//Õâ¸öº¯ÊýÖ÷ÒªÊÇÓÃÔÚ×Ö·û³£Á¿»òÕßQByteArray¹¹ÔìQString¶ÔÏóʱʹÓõÄÒ»ÖÖ±àÂ뷽ʽ¡£
QTextCodec::setCodecForTr(codec);
//Õâ¸öº¯ÊýµÄ×÷ÓÃÊÇÉèÖô«¸øtrº¯ÊýʱµÄĬÈÏ×Ö·û´®±àÂ룬GUIÉè¼ÆÖÐ×î³£ÓõÄÒ»ÖÖ¡£
QTextCodec::setCodecForLocale(codec);
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#include <QApplication>
#include <QTextCodec>
#include <QWidget>
#include <QLabel>
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QTextCodec::setCodecForTr(QTextCodec::codecForName("gb18030"));//********
    QWidget *pWidget = new QWidget;
    QLabel label(pWidget);
    label.setText(QObject::tr("ͬһ¸öÊÀ½ç£¬Í¬Ò»¸öÃÎÏë"));
    pWidget->show();
    return app.exec();
}
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