Qt中文編碼和QString類Unicode編碼轉換

 

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1 window中文GBK編碼和Unicode編碼轉換

//GBK‐> QString

QString str = QString::fromLocal8Bit("新浪微博");

 

//QString ‐> GBK

QString text = ui.lineEdit‐>text();

QByteArray bytes = text.toLocal8Bit();

const char* gbk = bytes.data();

2 Linux中文中文編碼和Unicode編碼轉換

UTF‐8‐> QString :

char utf8[] = {0xE4 ,0xBD, 0xA0, 0xE5, 0xA5, 0xBD, 0};  

QString str2 = QString::fromUtf8(utf8);

 

QString ‐> UTF‐8:

QString text = ui.lineEdit‐>text();

QByteArray bytes = text.toUtf8();

const char* utf8 = bytes.data();

int size = bytes.size();

 

3 使用QTextCodec類實現編碼<pre name="code" class="cpp">// QString(Unicode) ‐> std::string (GBK)

static string FromUnicode(const QString& qstr)

{

QTextCodec* pCodec = QTextCodec::codecForName("gb2312");

if(!pCodec) return "";

QByteArray arr = pCodec‐>fromUnicode(qstr);

string cstr = arr.data();

return cstr;

}

// std::string (GBK) ‐> QString(Unicode)

static QString ToUnicode(const string& cstr)

{

QTextCodec* pCodec = QTextCodec::codecForName("gb2312");

if(!pCodec) return "";

QString qstr = pCodec‐>toUnicode(cstr.c_str(), cstr.length());

return qstr;

}