操作系统：Win XP Sp2
IDE&框架：C,Qt Creator 2.0.
我试图将一些unicode(UTF-8)文本输出到Windows控制台,但是我看到的都是乱码代替unicode字符.我知道win控制台支持unicode(自从2000年以来)…至少根据维基百科和许多网络,但我不知道如何使它与Qt工作.我看过的大多数“解决方案”(没有看到很多)使用C和WInAPI技术,我不能使用,因为这不是Qt的方式.我使用QStrings和Qt！
代码下面我拿出所有不同的东西,我试图保持代码简单的帖子.希望有人可以得到代码的工作.
#include <QtCore/QCoreApplication>
#include <QString>
#include <QTextStream>
#include <QDate>
#include <QFile>
using namespace std;
int main(int argc,char *argv[])
{
QCoreApplication app(argc,argv);
QTextStream qin(stdin);
QTextStream qout(stdout);
//The last 2 chars in QString each need a double slash for an accent.
QString szqLine = QString::fromUtf8("abc áéüóöú őű");
//I want this text console output to be in red text color.
qout << "Bellow are some unicode characters: " << endl;
//The Win XP console does not display the unicode chars correctly!!
//The cosole does not display unicode chars even though it is capable
//according to wikipedia. I just don't kNow how with Qt.
//I want this text output in white(or default font color,not red.)
qout << szqLine << endl;
//Would be nice to get some unicode input from console too.
qout << "Write some unicode chars like above: " << endl;
QString szqInput;
szqInput = QString::fromUtf8(qin.readLine());
qout << "You wrote: " << endl;
qout << szqInput << endl;
return app.exec();
}
#include <QTextStream>
#ifdef Q_OS_WIN32
#include <windows.h>
#include <iostream>
#else
#include <locale.h>
#endif
class ConsoleTextStream: public QTextStream {
public:
ConsoleTextStream();
ConsoleTextStream& operator<<(const QString &string);
};
ConsoleTextStream::ConsoleTextStream():
QTextStream(stdout,qiodevice::writeonly)
{
}
ConsoleTextStream& ConsoleTextStream::operator<<(const QString &string)
{
#ifdef Q_OS_WIN32
WriteConsoleW(GetStdHandle(STD_OUTPUT_HANDLE),string.utf16(),string.size(),NULL,NULL);
#else
QTextStream::operator<<(string);
#endif
return *this;
}
class ConsoleInput: public QTextStream {
public:
Consoleinput();
QString readLine();
};
ConsoleInput::Consoleinput():
QTextStream(stdin,qiodevice::ReadOnly)
{
}
QString ConsoleInput::readLine()
{
#ifdef Q_OS_WIN32
const int bufsize = 512;
wchar_t buf[bufsize];
DWORD read;
QString res;
do {
ReadConsoleW(GetStdHandle(STD_INPUT_HANDLE),buf,bufsize,&read,NULL);
res += QString::fromWChararray(buf,read);
} while (read > 0 && res[res.length() - 1] != '\n');
// Could just do res.truncate(res.length() - 2),but better be safe
while (res.length() > 0
&& (res[res.length() - 1] == '\r' || res[res.length() - 1] == '\n'))
res.truncate(res.length() - 1);
return res;
#else
return QTextStream::readLine();
#endif
}
int main()
{
#ifndef Q_OS_WIN32
setlocale(LC_ALL,"");
#endif
ConsoleTextStream qout;
qout << QString::fromUtf8("Текст на иврите: לחם גרוזיני מסורתי הנאפה בתנור לבנים\n");
qout << QString::fromUtf8("Текст на японском: ※当サイト内コンテンツ・画像・写真データの、転載・転用・加工・無断複製は禁止いたします.\n");
qout << QString::fromUtf8("Текст на европейском: áéüóöú őű\n");
qout << flush; // needed on Linux
ConsoleInput qin;
QString s = qin.readLine();
qout << s << endl;
s = qin.readLine(); // one more time,to ensure we read everything ok
qout << s << endl;
return 0;
}
在Windows上,除了俄罗斯和欧洲之外,它会打印所有文字的方框.看起来,Lucida控制台不支持希伯来语和日语.有趣的是,当我将文本从控制台复制到剪贴板,然后粘贴到支持Unicode的地方(例如在浏览器中)时,它会正确显示.这证明Windows实际上是输出Unicode,只是不显示它.需要一些支持Unicode的控制台字体.
请注意,在上面的示例中,我仅覆盖了一个运算符<()(),但是如果我想使用它们,我将需要覆盖它们,因为它们返回QTextStream&但不是虚拟的,所以有必要使它们都返回ConsoleTextStream& amp;其他的东西,如qout<< 1 < someUnicodeString将无法正常工作. 我也在Linux上用UTF-8语言环境测试了这个例子,效果很好. 使用ReadConsoleW()的控制台输入工作是因为默认情况下,控制台配置为所谓的线路输入模式,所以它等待直到用户点击Enter,但不等到足够的字符可用来填充缓冲区,所以它完全正好是我们想要：读取一行,只要缓冲区大小就够了.