class.cpp - Opengist

class.cpp Raw

#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"

1	#include <iostream>
2	#include <string>
3	#include <nlohmann/json.hpp> // 引入 nlohmann/json 库
4	#include <QNetworkAccessManager>
5	#include <QNetworkRequest>
6	#include <QNetworkReply>
7	#include <QObject>
8	#include <QString>
9	#include <QDebug>
10
11	using json = nlohmann::json;
12
13	class YourCppClass : public QObject {
14	Q_OBJECT
15
16	public:
17	YourCppClass();
18	void fetchData(const QString &url);
19
20	private slots:
21	void onReplyFinished(QNetworkReply* reply);
22
23	private:
24	QNetworkAccessManager* networkManager;
25	};
26
27	YourCppClass::YourCppClass() {
28	networkManager = new QNetworkAccessManager(this);
29	connect(networkManager, SIGNAL(finished(QNetworkReply)), this, SLOT(onReplyFinished(QNetworkReply)));
30	}
31
32	void YourCppClass::fetchData(const QString &url) {
33	QNetworkRequest request(QUrl(url));
34	networkManager->get(request);
35	}
36
37	void YourCppClass::onReplyFinished(QNetworkReply* reply) {
38	if (reply->error() == QNetworkReply::NoError) {
39	QByteArray responseData = reply->readAll();
40	QString responseStr(responseData);
41
42	// 将 QByteArray 转换为 std::string 以供 nlohmann/json 使用
43	std::string responseDataStr = responseStr.toStdString();
44
45	try {
46	// 使用 nlohmann/json 解析 JSON 数据
47	json jsonObj = json::parse(responseDataStr);
48
49	// 解析出数据 (根据实际的 JSON 格式)
50	std::string username = jsonObj["username"].get<std::string>();
51	std::string content = jsonObj["content"].get<std::string>();
52
53	qDebug() << "Username:" << QString::fromStdString(username);
54	qDebug() << "Content:" << QString::fromStdString(content);
55
56	} catch (json::parse_error& e) {
57	qDebug() << "JSON parse error:" << e.what();
58	}
59	} else {
60	qDebug() << "Network error occurred:" << reply->errorString();
61	}
62
63	reply->deleteLater();
64	}
65
66	int main(int argc, char *argv[]) {
67	// 简单示例程序初始化
68	QCoreApplication app(argc, argv);
69
70	YourCppClass yourClass;
71	yourClass.fetchData("http://example.com/api"); // 替换为实际的 API URL
72
73	return app.exec();
74	}
75
76	#include "YourCppClass.moc"
77