如何解析此JSON文件？ （Qt）

Question

我正在使用Qt5.7.1，并尝试读取JSON文件中的信息。我文件的结构包括：配置的名称，神经元的数量，神经元的数组（每个神经元具有严格的受体和突触数量，也由数组表示）以及每个变量的系数值他们。我需要获取这些值。我有这个JSON文件：

{
"Task config name": "Test",
"Configuration": {
    "NeuronsCount": 2,
    "Neurons": [
        {
            "ReceptorsCount": 3,
            "Receptors": [
                {
                    "coef1": 17.32,
                    "coef2": 11.992,
                    "coef3": 2.314
                },
                {
                    "coef1": 12.982,
                    "coef2": 96.148,
                    "coef3": -1.899
                },
                {
                    "coef1": 49.11,
                    "coef2": 35.001,
                    "coef3": -643.52
                }
            ],

            "SynapsysCount": 4,
            "Synapses": [
                {
                    "coef1": 13.22,
                    "coef2": 31.992,
                    "coef3": 22.314
                },
                {
                    "coef1": 12.81,
                    "coef2": 36.8,
                    "coef3": -53.189
                },
                {
                    "coef1": 1.11,
                    "coef2": 44.261,
                    "coef3": -23.12
                },
                {
                    "coef1": 642.86,
                    "coef2": 24.24,
                    "coef3": 95.009
                }
            ]
        },

        {
            "ReceptorsCount": 3,
            "Receptors": [
                {
                    "coef1": 6.32,
                    "coef2": 64.992,
                    "coef3": 98.314
                },
                {
                    "coef1": 42.982,
                    "coef2": 11.148,
                    "coef3": -12.899
                },
                {
                    "coef1": 1.11,
                    "coef2": 752.001,
                    "coef3": -3.82
                }
            ],

            "SynapsysCount": 4,
            "Synapses": [
                {
                    "coef1": 19.82,
                    "coef2": 1.592,
                    "coef3": 75.384
                },
                {
                    "coef1": 89.81,
                    "coef2": 65.8,
                    "coef3": -13.189
                },
                {
                    "coef1": 18.11,
                    "coef2": 11.261,
                    "coef3": -211.12
                },
                {
                    "coef1": 2.86,
                    "coef2": 8.24,
                    "coef3": 6.009
                }
            ]
        }
    ]
}

}

我如何接收每个“受体”和“突触”的coef＃值？我试过了，但返回0。如何读取这样的文件？

QByteArray data = jsonFile.readAll();
QJsonDocument document;
document = document.fromJson(data);
QJsonObject jsonObject = document.object();
QJsonArray neuronsArray = jsonObject.value("Neurons").toArray();
qDebug() << "Size = " << neuronsArray.size();

Answer 1

您必须遍历JSON文档：

QJsonDocument doc = QJsonDocument::fromJson(file.readAll());
QJsonObject root = doc.object();
QJsonObject conf = root.value("Configuration").toObject();
//this gives you the neurons array, in there you have objects which you can access just like above
QJsonArray arr = conf.value("Neurons").toArray();