Qt json转string
cpp
QJsonArray array;
array.append("1");
array.append("2");
QJsonDocument doc(array);
QString arrayString = doc.toJson(QJsonDocument::Compact);
Qt string转json
cpp
QString jsonString = sql_query.value(22).toString();
QJsonDocument doc = QJsonDocument::fromJson(jsonString.toUtf8());
QJsonArray jsonArray = doc.array();
QML json转string
cpp
console.log(JSON.stringify(jsonArray));