1.关于QT中json数据处理和密码md5加密

17Json.pro

HEADERS += \

    MyWidget.h

SOURCES += \

    MyWidget.cpp

QT += widgets gui

MyWidget.h

#ifndef MYWIDGET_H

#define MYWIDGET_H

#include <QWidget>

class MyWidget : public QWidget

{

    Q_OBJECT

public:

    explicit MyWidget(QWidget *parent = 0);

signals:

public slots:

};

#endif // MYWIDGET_H

MyWidget.cpp

#include "MyWidget.h"

#include <QApplication>

#include <QJsonDocument>

#include <QJsonObject>

#include <QDebug>

#include <QCryptographicHash>  //用于加密的头文件

/*json的数据类型*/

/*

 "{

     "key": value

     [

        {},{},

     ]

 }"

*/

/*

 [

     {},

     {},

     {}

 ]

 */

MyWidget::MyWidget(QWidget *parent) :

    QWidget(parent)

{

    //使用md5加密

    QByteArray md5 = QCryptographicHash::hash(QByteArray("涂作权"),

                                              QCryptographicHash::Md5);

    QJsonObject obj;

    obj.insert("username",QString("涂作权"));

    obj.insert("password",QString(md5.toHex()));

    obj.insert("male",true);

    obj.insert("age",24);

    QJsonDocument doc(obj);

    QByteArray json = doc.toJson();

    qDebug() << json;

    //QJsonDocument doc2 = QJsonDocument::fromJson(json);

    //QJsonObject obj2 = doc2.object();

    QJsonObject obj2 = QJsonDocument::fromJson(json).object();

    if(obj2.value("username").toString() == "涂作权")

    {

        qDebug() << "yes";

    }

}

int main(int argc,char** argv)

{

    QApplication app(argc,argv);

    MyWidget w;

    w.show();

    return app.exec();

}

运行结果：