QT乱码对策

 1 using namespace std;
 2 
 3 //#pragma execution_character_set("UTF-8")
 4 int main(int argc, char *argv[])
 5 { 
 6 QApplication a(argc, argv);
 7 QString str = QStringLiteral("中文测试");
 8 //str = "中文测试";
 9 qDebug() << str;
10 //QMessageBox::information(0, "title", str);
11 char *src = "元数据中文GBK";
12 
13 //元数据是gbk或者gb2312 多字节存入QString
14 //本地编码方式 默认GBK
15 QString str1 = QString::fromLocal8Bit(src);
16 qDebug() << "str1 = " << str1;
17 
18 //把QString 转为gbk
19 cout << str1.toLocal8Bit().toStdString() << endl;
20 //本地处理编码方式，默认是GBK，改为UTF-8
21 QTextCodec::setCodecForLocale(QTextCodec::codecForName("UTF-8"));
22 QString str2 = QString::fromLocal8Bit(str1.toUtf8());
23 
24 QTextCodec::setCodecForLocale(QTextCodec::codecForName("GBK"));
25 qDebug() << "str2 = " << str2;
26 //win api调用qstring作为参数
27 MessageBox(0, str2.toStdWString().c_str(), L"中文标题",0);
28 
29 //vs_cn_codec w;
30 //w.show();
31 return a.exec();
32 }

 

来源：https://www.cnblogs.com/linxuemufeng/p/12432526.html