Some Thing Wrong When I Save QString To File With Unicode Bom ?

[joeQ]

Hi, I want to save QString to file with the Unicode Bom, like the following Code

#include <QCoreApplication>

#include <QString>
#include <QFile>
#include <QTextStream>
#include <QDebug>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    QString str = QString::fromUtf8("你好,我是QString");
    QFile file;
    QTextStream out;

    file.setFileName("a.txt");
    if( !file.open( QIODevice::WriteOnly | QIODevice::Text) )
    {
        qDebug() << file.errorString();
        return 0;
    }

    out.setDevice(&file);
    out.setCodec("UTF-8");
    out.setGenerateByteOrderMark(true);
    out << str;
    file.close();
    qDebug() << "OK!";

    return a.exec();
}

But, when i use the vim :%!xxd to see the hex. I am not found the 0xffef.

Maybe there is a better way to save QString to file with unicode and bom x0ffef ?

[joeQ]

@joeQ

oh, I know what i wrong! if i want to save file with x0ffef, i should use the 'utf-16'.

#include <QCoreApplication>

#include <QString>
#include <QFile>
#include <QTextStream>
#include <QDebug>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    QString str = QString("你好,我是QString");
    QFile file;
    QTextStream out;

    file.setFileName("a.txt");
    if( !file.open( QIODevice::WriteOnly | QIODevice::Text) )
    {
        qDebug() << file.errorString();
        return 0;
    }

    out.setDevice(&file);
    out.setCodec("UTF-16"); ///< hould use the utf-16
    out.setGenerateByteOrderMark(true);
    out << str;
    file.close();
    qDebug() << "OK!";

    return a.exec();
}