[开发测试]QT 构造JSON格式发送数据

? ? ? ? 由于项目要求向服务器平台提供的api接口发送特定格式的json数据，本地客户端处理后向其发送，首先是用postman模拟了一下上传的效果，以及查看返回的状态码判断上传是否成功。

//json格式示例
[
    {
		"device_id": "CJ02A-2110051",
		 "sensorArray": [50,60],
		"upload_time": "2021-12-07 17:00:00"
    }
]

?????????从结构上判断主要是{}数组[ ]里面包含了1个object对象{ }，然后这个object对象里包含了3个

参数，参数里“sensorArray”也是一个数组。代码如下：

    QString device_id = "CJ02A-2110051";
    QString upload_time = "2021-12-12 20:00:00";
    float Temperature = 15.30;
    float Humidity = 70.34;
    QJsonArray TH;
    TH.append(Temperature);
    TH.append(Humidity);

    QJsonObject json;//构建json对象json
    json.insert("device_id", device_id);
    json.insert("sensorArray",QJsonValue(TH));
    json.insert("upload_time", upload_time);

    QJsonArray JSON;
    JSON.append(QJsonValue(json));



    QJsonDocument document;
    document.setArray(JSON);
    QByteArray byte_array = document.toJson(QJsonDocument::Indented);//Compact
    QString json_str(byte_array);
    ui->textEdit_3->setText(json_str);
    //http请求
    QNetworkRequest request1;
    QNetworkAccessManager* naManager = new QNetworkAccessManager(this);
    QMetaObject::Connection connRet = QObject::connect(naManager,SIGNAL(finished(QNetworkReply*)), this, SLOT(requestFinished(QNetworkReply*)));
    Q_ASSERT(connRet);

    request1.setUrl(QUrl("http://iot.joinken.cn/nyy/admin/hd/hd_device/analogDeviceData"));


    request1.setHeader(QNetworkRequest::ContentTypeHeader,QVariant("application/json"));
    QString token= "Bearer eyJhbGciOiJIUzUxMiJ8";
    QString token_headerData = token;
    request1.setRawHeader("Authorization",token_headerData.toLocal8Bit());
    QNetworkReply* reply = naManager->post(request1, byte_array);

?这里的函数主要是用来返回状态码查看上传情况。

void MainWindow::requestFinished(QNetworkReply* reply) {
    // 获取http状态码
    QVariant statusCode = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute);
    if(statusCode.isValid())
        qDebug() << "status code=" << statusCode.toInt();

    QVariant reason = reply->attribute(QNetworkRequest::HttpReasonPhraseAttribute).toString();
    if(reason.isValid())
        qDebug() << "reason=" << reason.toString();

    QNetworkReply::NetworkError err = reply->error();
    if(err != QNetworkReply::NoError) {
        qDebug() << "Failed: " << reply->errorString();
    }
    else {
        // 获取返回内容
        qDebug() << QString::fromLocal8Bit(reply->readAll());
    }
}