QT parse string into JSON data and parse

Preface

Call an interface in the company , I use the method encapsulated by my colleagues , The return value of the string, So I thought QString Can it be converted to JSON data , And analyze it .qt Pass through QJsonDocument take QString To JSON, as long as QString Can be converted to json, Many parsing json The problem of data is naturally easy to solve .

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Case study ：

{
    
  "StatusCode": 200,
  "ErrCode": 0,
  "Msg": "success",
  "Data": [
    {
    
      "SchoolID": "S-05061411",
      "schoolName": " Southeast University ",
      "SchoolType": 5
    }
  ]
}

The code is as follows ：（ It is concluded that SchoolID and schoolName）

    QJsonParseError jsonError;
    QJsonDocument jsonDoc(QJsonDocument::fromJson(schoolInfo.toStdString().data(), &jsonError));	//schoolInfo For the above string of data QString Variable of type 

    if(jsonError.error == QJsonParseError::NoError){
    
        QJsonObject rootObj = jsonDoc.object();
        
        //------ The reader modifies... According to the actual situation 
        QJsonArray data = rootObj.value("Data").toArray();		// obtain Data,Data In this case, it's an array , therefore toArray()
        for(int i=0;i<data.size();i++){
    		// Parsing arrays 
            QJsonObject  schoolInfo=data.at(i).toObject();		// Each item in the array is another json
            QString schoolId = schoolInfo.value("SchoolID").toString();	// Parse string 
            QString schoolName_1 = schoolInfo.value("schoolName").toString();	// Analysis of Chinese 
            int schoolType = schoolInfo.value("SchoolType").toInt();	// Parsing numbers 

        }
        //------ The reader modifies... According to the actual situation 
        
    }else {
    
        qDebug() << "json error!" << jsonError.errorString();	//json There's a problem with the data 
    }

Be careful ： There is no problem with the code , If an error is reported, it may be because the header file is not inserted

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