C++正则表达式匹配

例子：匹配 room_id=13549846

QRegExp使用

QString getData = curlSimple.GetSimple(url); QDBG << getData; QRegExp rx("room_id=[\\d]{1,15}"); rx.indexIn(getData); QString roomIDstr = rx.cap().remove("room_id=").remove("\""); QDBG << roomIDstr;

std::regex使用

inline QString regexFrom(QString data, QString pnPattern) { std::string strData = data.toStdString(); std::regex pnR(pnPattern.toStdString()); for (std::sregex_iterator it(strData.begin(), strData.end(), pnR), end; it != end; ++it) { return QString::fromStdString(it->str(1)); } return ""; } //匹配<span class=\"red\">(.*)</span> QString URLcode = curl.GetSimple(QString::fromStdString(strUrl)); QDBG << QString::fromStdString(URLcode); QDBG << regexFrom(URLcode,"<span class=\"red\">(.*)</span>");