如何在QT中将实体字符（转义字符）转换为HTML？

Question

我想在QT中将实体字符（转义字符）转换为HTML，请帮助我....

即：我想将"替换为"，将>替换为>

=====这是我的代码无效====

   QString MyApp::ReplaceString(const QString Data, const QString &Before, const      QString &After)
{

    QString Result = Data;
    Result.replace(Before, After, Qt::CaseInsensitive);
    return Result;
}

======

QTextCodec *codec = QTextCodec::codecForName("UTF-8");
QByteArray data=pReply->readAll();
QString str = codec->toUnicode((const char *)data);

str = Qt::escape(str);
str = ReplaceString(str, """, "\"");   

str = ReplaceString(str,">", ">");

Answer 1

我不确定我理解你想要什么，只是猜测。您可以使用QTextDocument。尝试这样的事情：

QTextDocument text;
text.setHtml("<>"");
QString plain = text.toPlainText();
qDebug("%s.", qPrintable(plain));

请记住，QTextDocument需要gui模块。

Answer 2

我认为这可以解决您的问题。

QString escaped= 
QString(myhtml).replace("&","&amp;").replace(">","&gt;").replace("<","&lt;");

Answer 3

测试escape()功能：

 QString plain = "#include <QtCore>"
 QString html = Qt::escape(plain);
 // html == "#include &lt;QtCore&gt;"

和convertFromPlainText()功能：

QString Qt::convertFromPlainText ( const QString & plain, WhiteSpaceMode mode = WhiteSpacePre )

Answer 4

您好，将非ASCII字符转换为＆amp;＃ XXX ; （其中 XXX 是一个数字）：

/***************************************************************************//*!
* @brief Encode all non ASCII characters into &#...;
* @param[in] src        Text to analyze
* @param[in,opt] force  Force the characters "list" to be converted.
* @return ASCII text compatible. 
*
* @note Original code: http://www.qtforum.org/article/3891/text-encoding.html
*
* @warning Do not forget to use QString::fromUtf8()
*/
QString encodeEntities( const QString& src, const QString& force=QString() )
{
    QString tmp(src);
    uint len = tmp.length();
    uint i = 0;
    while( i<len )
    {
        if( tmp[i].unicode() > 128 || force.contains(tmp[i]) ){
            QString rp = "&#"+QString::number(tmp[i].unicode())+";";
            tmp.replace(i,1,rp);
            len += rp.length()-1;
            i += rp.length();
        }else{
            ++i;
        }
    }
    return tmp;
}


/***************************************************************************//*!
* @brief Allows decode &#...; into UNICODE (utf8) character.
* @param[in] src    Text to analyze
* @return UNICODE (utf8) text.
*
* @note Do not forget to include QRegExp
*/
QString decodeEntities( const QString& src )
{
    QString ret(src);
    QRegExp re("&#([0-9]+);");
    re.setMinimal(true);

    int pos = 0;
    while( (pos = re.indexIn(src, pos)) != -1 )
    {
        ret = ret.replace(re.cap(0), QChar(re.cap(1).toInt(0,10)));
        pos += re.matchedLength();
    }
    return ret;
}

基本用法：

qDebug() << encodeEntities(QString::fromUtf8("éà@<>hello the world €"),QString("<>"));
// Will print: &#233;&#224;@&#60;&#62;hello the world &#8364;
qDebug() << decodeEntities("a&#223;&#233;plop&#233;&#224;&#231;&#234;&#8364;");
// Will print: hello world