qt http get post 请求

1.首先在项目配置里面添加network,qmake项目如下，CMake项目类似

QT       += network

2.使用头文件

#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QJsonDocument>	//处理json字符串

3.定义私有私有类型全局变量

private:
QNetworkAccessManager *nam;

4.网络请求模块初始化

nam=new QNetworkAccessManager(this);

5.发出get请求

    QString url="www.baidu.com" //替换成实际的网页
    QNetworkRequest request;
    request.setUrl(url);
    QNetworkReply *reply=nam->get(request);

	//处理相应请求
    connect(reply, &QNetworkReply::finished, this, [this, reply]() {
    	if (reply->error() == QNetworkReply::NoError) {
            // qDebug() << "Request successful!";
            QString reply_data = reply->readAll();
    })

6.发出post请求

QJsonObject json;
    json.insert("User", "admin");
    json.insert("Password", "admin");

    QJsonDocument document;
    document.setObject(json);
    QByteArray dataArray = document.toJson(QJsonDocument::Compact);

	QString url="www.baidu.com" //替换成实际的网页
    QNetworkRequest request;
    request.setUrl(url);
    nam->post(request,dataArray);