Qt中UTF-8转Unicode

#include <QtCore/QCoreApplication>
#include <QDebug>
#include <iostream>
#include <QTextCodec>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

   // const std::string str = "汉字";
    const QString str = "汉字";


    std::cout << str.length() << std::endl;

    QTextCodec *codec = QTextCodec::codecForName("UTF-8");
    QString unicode_str = codec->toUnicode(str.toLatin1().data());

    for(int i = 0;i <unicode_str.length();++i) {
        qDebug() << QString::number(unicode_str[i].unicode(),16);
    }
    
    return a.exec();
}
#include <QtCore/QCoreApplication>
#include <QD