QString和QJson互转

1、QJsonObject转QString

QString strRet;
QJsonDocument doc(jsonObj);
strRet = QString(doc.toJson(QJsonDocument::Indented));

2、QString转QJsonObject

QJsonDocument doc = QJsonDocument::fromJson(strJson.toUtf8());
QJsonObject obj = doc.object();

3、QJsonArray转QString

QString strRet;
QJsonDocument doc(jar);
strRet = QString(doc.toJson(QJsonDocument::Indented));

4、QString转QJsonArray

 QJsonDocument doc = QJsonDocument::fromJson(strJson.toUtf8());
 QJsonArray arry = doc.array();