在Qt中发出HTTP请求

#include <QNetworkAccessManager>
#include <QNetworkRequest>
#include <QNetworkReply>

QNetworkAccessManager *networkManager = new QNetworkAccessManager(this);

QNetworkRequest request(QUrl("http://example.com/api"));

networkManager->get(request);

QNetworkReply *reply = networkManager->get(request);

if (reply->error() != QNetworkReply::NoError) {
    qDebug() << "Error:" << reply->errorString();
    return;
}

QByteArray data = reply->readAll();

QJsonDocument jsonDocument = QJsonDocument::fromJson(data);

QJsonObject jsonObject = jsonDocument.object();