dylan / class.cpp

#include <iostream> #include <string> #include <nlohmann/json.hpp> // 引入 nlohmann/json 库 #include <QNetworkAccessManager> #include <QNetworkRequest> #include <QNetworkReply> #include <QObject> #include <QString> #include <QDebug> using json = nlohmann::json; class YourCppClass : public QObject { Q_OBJECT public: YourCppClass(); void fetchData(const QString &url); private slots: void onReplyFinished(QNetworkReply* reply); private: QNetworkAccessManager* networkManager; }; YourCppClass::YourCppClass() { networkManager = new QNetworkAccessManager(this); connect(networkManager, SIGNAL(finished(QNetworkReply*)), this, SLOT(onReplyFinished(QNetworkReply*))); } void YourCppClass::fetchData(const QString &url) { QNetworkRequest request(QUrl(url)); networkManager->get(request); } void YourCppClass::onReplyFinished(QNetworkReply* reply) { if (reply->error() == QNetworkReply::NoError) { QByteArray responseData = reply->readAll(); QString responseStr(responseData); // 将 QByteArray 转换为 std::string 以供 nlohmann/json 使用 std::string responseDataStr = responseStr.toStdString(); try { // 使用 nlohmann/json 解析 JSON 数据 json jsonObj = json::parse(responseDataStr); // 解析出数据 (根据实际的 JSON 格式) std::string username = jsonObj["username"].get<std::string>(); std::string content = jsonObj["content"].get<std::string>(); qDebug() << "Username:" << QString::fromStdString(username); qDebug() << "Content:" << QString::fromStdString(content); } catch (json::parse_error& e) { qDebug() << "JSON parse error:" << e.what(); } } else { qDebug() << "Network error occurred:" << reply->errorString(); } reply->deleteLater(); } int main(int argc, char *argv[]) { // 简单示例程序初始化 QCoreApplication app(argc, argv); YourCppClass yourClass; yourClass.fetchData("http://example.com/api"); // 替换为实际的 API URL return app.exec(); } #include "YourCppClass.moc"