Qt的两个工程软件中使用套接字进行通信获取信息怎么写代码

在Qt中，你可以使用其内置的QTCOMMON模块中的QTcpSocket类来进行套接字通信。首先，你需要在两个项目中设置好网络编程的支持，并创建QTcpSocket对象。下面是一个简单的示例，展示了如何在一个接收端（Server）和发送端（Client）之间交换数据：

**服务器端（Server.cpp）:**

#include <QObject>
#include <QTcpServer>
#include <QByteArray>

class Server : public QObject
{
    Q_OBJECT

public slots:
    void handleNewConnection() {
        QTcpSocket *client = new QTcpSocket(this);
        connect(client, &QTcpSocket::readyRead, this, &Server::readData);
        connect(client, &QTcpSocket::disconnected, client, &QObject::deleteLater);

        if (!client->connectToHost(serverAddress, serverPort)) {
            qDebug("Could not connect to client");
        } else {
            qDebug("Connected to client!");
        }
    }

private slots:
    void readData() {
        QByteArray data = client->readAll();
        qDebug("Received data: %s", data.data());
        // 对接收到的数据进行处理或转发
    }

public:
    Server(const QString &serverAddress, quint16 serverPort)
        : serverAddress(serverAddress), serverPort(serverPort) {}

private:
    QString serverAddress;
    quint16 serverPort;
};

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    Server server("localhost", 8080); // 使用本地地址和默认端口
    server.handleNewConnection(); // 启动监听连接
    return app.exec();
}

**客户端（Client.cpp）:**

#include <QObject>
#include <QTcpSocket>
#include <QStringList>

class Client : public QObject
{
    Q_OBJECT

public:
    explicit Client(QObject *parent = nullptr)
        : QObject(parent)
    {
        connect(&socket, &QTcpSocket::connected, this, []() { qDebug("Connected to server!"); });
        connect(&socket, &QTcpSocket::disconnected, this, []() { qDebug("Disconnected from server."); });
        connect(&socket, &QTcpSocket::readyRead, this, &Client::sendData);
    }

private slots:
    void sendData() {
        QByteArray message = "Hello, Server!"; // 发送的数据
        socket.write(message);
    }

public slots:
    void startCommunication() {
        if (socket.connectToHost(serverAddress, serverPort)) {
            sendData();
        } else {
            qDebug("Could not connect to server");
        }
    }

private:
    QTcpSocket socket;
    QString serverAddress = "localhost";
    quint16 serverPort = 8080; // 服务器的IP和端口号，这里假设与上面一致
};

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    Client client;
    client.startCommunication();
    return app.exec();
}

这两个例子中，`Server`会监听指定地址和端口的连接请求，而`Client`尝试连接到服务器并发送消息。确保两个项目的构建配置支持网络通信。