Qt Json

// 定义一个抽象接口类 #ifndef JSONBASE_H #define JSONBASE_H #include<QJsonObject> class IJsonSerialize { public: IJsonSerialize() = default; virtual void read( QJsonObject &json) = 0; virtual void write( QJsonObject &json) = 0; }; #endif // JSONBASE_H // 要进行序列化的类，都继承于同样的接口 // 对于复杂字段都要继承并实现其read 和write #ifndef CAMSETTINGS_H #define CAMSETTINGS_H #include<QObject> #include<JsonBase.h> #include<QString> enum ActionType{Auto,Manual}; enum PixelFormat{JPEG,PNG,RAW}; class Exposure:public IJsonSerialize { Q_GADGET; public: Exposure() = default; void read( QJsonObject &json) override; void write( QJsonObject &json) override; ActionType Mode()const; void setMode(const ActionType type); int ISP() const; void setISP(const int i); int Time() const; void setTime(const int i); private: ActionType _mode; int _isp; int _time; }; class CamSettings:public IJsonSerialize { Q_GADGET; public: CamSettings() =default; void read( QJsonObject &json) override; void write( QJsonObject &json) override; Exposure getExposure() const; void setExposure(const Exposure &e); ActionType Af_Mode() const; void setAfMode(const ActionType a); QString Rate() const; void setRate(const QString &s); QString ProjName() const; void setProjName(const QString &s); QString PixFormat()const; void setPixFormat(const QString &s) ; private: Exposure _exposure ; ActionType _af_mode ; QString _rate; QString _proj_name; QString _pix_format; }; #endif #include "camsettings.h" void CamSettings::read( QJsonObject &json) { if(json.contains("exposure") && json["exposure"].isObject()) { Exposure ex; auto a =json["exposure"].toObject(); ex.read(a); _exposure = ex; } if(json.contains("afmode") && json["afmode"].isDouble()) _af_mode = ActionType(json["afmode"].toInt()); if(json.contains("rate") && json["rate"].isString()) _rate = json["rate"].toString(); if(json.contains("projname") && json["projname"].isString()) _proj_name = json["projname"].toString(); if(json.contains("pixformat") && json["pixformat"].isString()) _pix_format = json["pixformat"].toString(); } void CamSettings::write( QJsonObject &json) { QJsonObject exp; _exposure.write(exp); json["exposure"] = exp; json["afmode"] = _af_mode; json["rate"] = _rate; json["projname"] = _proj_name; json["pixformat"] = _pix_format; } Exposure CamSettings::getExposure() const { return _exposure; } void CamSettings::setExposure(const Exposure &e) { _exposure = e; } ActionType CamSettings::Af_Mode() const { return _af_mode; } void CamSettings::setAfMode(const ActionType a) { _af_mode = a; } QString CamSettings::Rate() const { return _rate; } void CamSettings::setRate(const QString &s) { _rate = s; } QString CamSettings::ProjName() const { return _proj_name; } void CamSettings::setProjName(const QString &s) { _proj_name = s; } QString CamSettings::PixFormat() const { return _pix_format; } void CamSettings::setPixFormat(const QString &s) { _pix_format = s; } void Exposure::read( QJsonObject &json) { if(json.contains("mode") && json["mode"].isDouble()) _mode = ActionType(json["mode"].toInt()); if(json.contains("isp") && json["isp"].isDouble()) _isp = json["isp"].toInt(); if(json.contains("time") && json["time"].isDouble()) _time = json["time"].toInt(); } void Exposure::write( QJsonObject &json) { json["mode"]= _mode; json["isp"] = _isp; json["time"] = _time; } ActionType Exposure::Mode() const { return _mode; } void Exposure::setMode(const ActionType type) { _mode = type; } int Exposure::ISP() const { return _isp; } void Exposure::setISP(const int i) { _isp =i; } int Exposure::Time() const { return _time; } void Exposure::setTime(const int i) { _time = i; } #include <QCoreApplication> #include<QFile> #include<QBitArray> #include<QJsonDocument> #include<QDebug> //#define SERIALIZE #include "camsettings.h" using namespace std; int main(int argc, char *argv[]) { QFile _file("camsettings.json"); #ifdef SERIALIZE Exposure ex; ex.setISP(200); ex.setMode(Auto); ex.setTime(30000); CamSettings cs; cs.setExposure(ex); cs.setRate("30fps"); cs.setAfMode(Manual); cs.setProjName("MyTestOne"); cs.setPixFormat("RAW"); QJsonObject obj; cs.write(obj); if (!_file.open(QIODevice::WriteOnly)) { qWarning("Couldn't open save file."); return false; } _file.write(QJsonDocument(obj).toJson()); #else if (!_file.open(QIODevice::ReadOnly)) { qWarning("Couldn't open save file."); return false; } QByteArray data = _file.readAll(); auto doc = QJsonDocument::fromJson(data).object(); CamSettings cs; cs.read(doc); qDebug()<< cs.getExposure().ISP(); #endif _file.flush(); _file.close(); }