QJson生成.json文件

生成簡單的json文件

QVariantHash data;QVariantHash patientData;patientData.insert("patient ID","22334");patientData.insert("Name","ZYL_YY");patientData.insert("age","26");patientData.insert("clinicalData","wwwww");patientData.insert("Selected site","lever");patientData.insert("Selected mode","pulse mode");data.insert("patientInformation",patientData);QJsonObject rootobj = QJsonObject::fromVariantHash(data);QJsonDocument document;document.setObject(rootobj);QByteArray byte_array = document.toJson();QString json_str = (byte_array);QFile file("/home/wxh1/1.json");if(!file.open(QIODevice::ReadWrite | QIODevice::Text | QIODevice::Truncate)){qDebug()<<"file error";}QTextStream in(&file);in<<json_str;file.close();

生成的jison文件

{"patientInformation": {"Name": "ZYL_YY","Selected mode": "pulse mode","Selected site": "lever","age": "26","clinicalData": "wwwww","patient ID": "22334"} }

解析json文件QFile file("/home/wxh1/1.json");

// file.open(QIODevice::ReadOnly | QIODevice::Text); //

QString value = file.readAll(); file.close(); // QJsonParseError jsonError; QJsonDocument doucement = QJsonDocument::fromJson(value.toUtf8(),&jsonError); // if(!doucement.isNull()&&(jsonError.error == QJsonParseError::NoError)) {//if(doucement.isObject()){//_jsonObject = doucement.object();QVector<QString> patien_item(6);//if(_jsonObject.contains("patientInformation")){//QJsonValue jsonValueList = _jsonObject.value(QStringLiteral("patientInformation"));QJsonObject item = jsonValueList.toObject(); // patien_item[0]=item["Name"].toString();patien_item[1]=item["Selected mode"].toString();patien_item[2]=item["Selected site"].toString(); patien_item[3]=item["patient ID"].toString();patien_item[4]=item["age"].toString();patien_item[5]=item["clinicalData"].toString();}}}

構建json數組

QJsonArray probePlacementData;for(int i =0;i<5;i++){QJsonObject obj;obj.insert("voltage","3000");obj.insert("distance","2.4");obj.insert("pulseLength","100");obj.insert("numpulse","90");probePlacementData.append(obj);}data.insert("probePlacementData",probePlacementData);QJsonObject rootobj = QJsonObject::fromVariantHash(data);QJsonDocument document;document.setObject(rootobj);QByteArray byte_array = document.toJson();QString json_str = (byte_array);QFile file("/home/wxh1/1.json");if(!file.open(QIODevice::ReadWrite | QIODevice::Text | QIODevice::Truncate)){qDebug()<<"file error";}QTextStream in(&file);in<<json_str;file.close();

　生成的json文件

{"probePlacementData": [{"distance": "2.4","numpulse": "90","pulseLength": "100","voltage": "3000"},{"distance": "2.4","numpulse": "90","pulseLength": "100","voltage": "3000"},{"distance": "2.4","numpulse": "90","pulseLength": "100","voltage": "3000"},{"distance": "2.4","numpulse": "90","pulseLength": "100","voltage": "3000"},{"distance": "2.4","numpulse": "90","pulseLength": "100","voltage": "3000"}] }

　解析json文件

struct _probePlacementDataStruct {QString voltage;QString distance;QString pulseLegth;QString numpulse; };QFile file("/home/wxh1/1.json"); // file.open(QIODevice::ReadOnly | QIODevice::Text); //

QString value = file.readAll(); file.close(); // QJsonParseError jsonError; QJsonDocument doucement = QJsonDocument::fromJson(value.toUtf8(),&jsonError); // if(!doucement.isNull()&&(jsonError.error == QJsonParseError::NoError)) {//if(doucement.isObject()){//_jsonObject = doucement.object();if(_jsonObject.contains(QStringLiteral("probePlacementData"))){QJsonValue arrayVaule = _jsonObject.value(QStringLiteral("probePlacementData"));if(arrayVaule.isArray()){QJsonArray array = arrayVaule.toArray();for(int i = 0;i<array.size();i++){QJsonValue iconArray = array.at(i);QJsonObject childrens = iconArray.toObject();QString voltage = childrens["voltage"].toString();QString distance = childrens["distance"].toString();QString pulseLength = childrens["pulseLength"].toString();QString numPulse = childrens["numpulse"].toString();_probePlacementDataStruct list;list.voltage = voltage;list.distance = distance;list.pulseLegth = pulseLength;list.numpulse = numPulse;}}}}}

　　

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轉載于:https://www.cnblogs.com/wxh-53919/p/10910495.html

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