Qt解析json数据

「爱情、让人受尽委屈。」 2024-04-17 17:44 81阅读 0赞

> widget.h

#ifndef WIDGET_H
    #define WIDGET_H
    
    #include <QWidget>
    #include <QList>
    
    namespace Ui {
    class Widget;
    }
    
    struct EnjoyFruits
    {
        QString FruitName;
        QString FruitColor;
    };
    
    struct Student
    {
        QString name;
        int age;
        QString city;
        QList<EnjoyFruits> fruits;
    };
    
    class Widget : public QWidget
    {
        Q_OBJECT
    
    public:
        explicit Widget(QWidget *parent = 0);
        ~Widget();
    
    public slots:
        void onToJsonBtnClicked();
        void onToTextBtnClicked();
    
    public:
        void writeEdit(QString name,QString value);
    
    
    private:
        Ui::Widget *ui;
    
        Student student;
        QByteArray byte;
    };
    
    #endif // WIDGET_H

>  widget.cpp

#include "widget.h"
    #include "ui_widget.h"
    #include <QJsonObject>
    #include <QJsonArray>
    #include <QJsonDocument>
    
    Widget::Widget(QWidget *parent) :
        QWidget(parent),
        ui(new Ui::Widget)
    {
        ui->setupUi(this);
        connect(ui->toJsonBtn,&QPushButton::clicked,this,&Widget::onToJsonBtnClicked);
        connect(ui->toTextBtn,&QPushButton::clicked,this,&Widget::onToTextBtnClicked);
    
        QFile file("C:\\Users\\chnsys\\Desktop\\file.txt");
        if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
            return;
    
        byte = file.readAll();
        ui->textEditLeft->setText(byte);
    
    }
    
    Widget::~Widget()
    {
        delete ui;
    }
    
    
    void Widget::writeEdit(QString name, QString value)
    {
        QString str = QString("%1 = %2 \n").arg(name).arg(value);
        ui->textEditRight->append(str);
    }
    
    void Widget::onToTextBtnClicked()
    {
        QByteArray strTrans = byte;
        QJsonParseError json_error;
        QJsonDocument jsonDoc(QJsonDocument::fromJson(strTrans, &json_error));
    
        if (json_error.error == QJsonParseError::NoError)
        {
            QJsonObject rootObj = jsonDoc.object();
            QJsonArray array;
            if (rootObj.contains("age") && rootObj.value("age").isDouble())
            {
                writeEdit("age",QString::number(rootObj.value("age").toInt()));
            }
            if (rootObj.contains("city") && rootObj.value("city").isString())
            {
                writeEdit("city",rootObj.value("city").toString());
            }
            if (rootObj.contains("name") && rootObj.value("name").isString())
            {
                writeEdit("name",rootObj.value("name").toString());
            }
            if (rootObj.contains("enjoyFruit") && rootObj.value("enjoyFruit").isArray())
            {
               array = rootObj.value("enjoyFruit").toArray();
               for(int i = 0; i< array.size();i++)
               {
                   QJsonObject childObj = array[i].toObject();
                   if (childObj.contains("fruitColor") && childObj.value("fruitColor").isString())
                   {
                       writeEdit("fruitColor",childObj.value("fruitColor").toString());
                   }
                   if (childObj.contains("fruitName") && childObj.value("fruitName").isString())
                   {
                       writeEdit("fruitName",childObj.value("fruitName").toString());
                   }
               }
            }
        }
    }
    
    void Widget::onToJsonBtnClicked()
    {
    
    }

>  运行截图

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d6ejk1MzIwMDQ2Mw_size_16_color_FFFFFF_t_70][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d6ejk1MzIwMDQ2Mw_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20190829145638659.PNG?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d6ejk1MzIwMDQ2Mw==,size_16,color_FFFFFF,t_70