qt文件操作

int query::readFromFile()
{
//    QFile file("./student.txt");
//    if(!file.open(QIODevice::ReadOnly | QIODevice::Text))
//    {
//        QMessageBox::critical(this, "error", "readfile failed");
//        return -1;
//    }
//    while(!file.atEnd())
//    {
//        QByteArray line = file.readLine();
//        qDebug()<<line;
//    }

//QTextCodec *code=QTextCodec::codecForName("utf8");//本人采用的是UTF8格式显示的
QFile file("./student.txt");
file.open(QIODevice::ReadOnly | QIODevice::Text);
QTextStream in(&file);
in.setCodec("utf8");//输出流的设置--------必须嘀
//in.setCodec(code)
while(!in.atEnd())
{
QString line = in.readLine();
qDebug()<<line;
}
file.close();
return 0;
}