JSON:一种轻量级的数据交换格式

1 JSON Viewer    Tools
2 Target struct

{
"method": "userAuth",
"value":
[
"cardnum": "1234567890"
]
}

3 Begin construct
JsonArray keywords = JsonArray() << "cardnum" << "1234567890";
JsonObject extra;
extra["method"] = "userAuth";
extra["value"] = keywords;

4 Finished
qDebug()<<QtJson::serialize(extra);

note:
一种Complex的构造方式
JsonObject extra;
JsonObject subobj;

subobj["cardnum"] = "1234567890";
JsonArray keywords = JsonArray() << subobj; //with {}
extra["method"] = "userAuth";
extra["value"] = keywords;

JsonObject indent;
JsonArray plugin = result["value"].toList();
foreach(QVariant plug, plugin)
{
indent = plug.toMap();
qDebug()<< "cardNum:" << indent["cardNum"].toString();
}

QString strobj = QtJson::serializeStr(extra); //extra is an object
string sParam = strobj.toStdString(); //from QString to std::string