如何使用Qt从文件中读取UTF-8文本？

Question

从文件中读取UTF-8编码文本时遇到一些问题.我的版本只读取ASCII字符.

#include <QtCore>

int main()
{
    QFile file("s.txt");

    if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
    {
        return -1;
    }

    QTextStream in(&file);
    while(!in.atEnd())
    {
        QString line = in.readLine();
        qDebug() << line;
    }
}

s.txt:

j?ka? si?
?limak
?nie?yca

输出:

"jka si" 
"limak" 
"nieyca"

我该怎么用？

Answer 1

见QTextStream::setCodec():

in.setCodec("UTF-8");

Answer 2

你shuold做:

QTextStream in(&file);
in.setCodec("UTF-8"); // change the file codec to UTF-8.

while(!in.atEnd())
{
    QString line = in.readLine();
    qDebug() << line.toLocal8Bit(); // convert to locale multi-byte string 
}