qt lis 客户端代码示例

以下是一个使用 Qt 的示例代码，可以连接到一个 LIS 服务器并发送和接收消息：

#include <QtCore>
#include <QtNetwork>

class LisClient : public QObject
{
    Q_OBJECT

public:
    explicit LisClient(QObject *parent = nullptr)
        : QObject(parent)
        , socket(new QTcpSocket(this))
    {
        connect(socket, &QTcpSocket::connected, this, &LisClient::connected);
        connect(socket, &QTcpSocket::disconnected, this, &LisClient::disconnected);
        connect(socket, &QTcpSocket::readyRead, this, &LisClient::readyRead);
        connect(socket, QOverload<QAbstractSocket::SocketError>::of(&QAbstractSocket::error),
                this, &LisClient::socketError);
    }

    void connectToServer(const QString &host, quint16 port)
    {
        qDebug() << "Connecting to LIS server:" << host << port;
        socket->connectToHost(host, port);
    }

    void sendMessage(const QString &message)
    {
        qDebug() << "Sending message:" << message;
        QByteArray data = message.toUtf8();
        data.append('\n');
        socket->write(data);
    }

signals:
    void connected();
    void disconnected();
    void readyRead(const QString &message);
    void socketError(QAbstractSocket::SocketError socketError);

private slots:
    void connected()
    {
        emit connected();
    }

    void disconnected()
    {
        emit disconnected();
    }

    void readyRead()
    {
        QByteArray data = socket->readAll();
        QString message = QString::fromUtf8(data.constData(), data.length());
        emit readyRead(message);
    }

    void socketError(QAbstractSocket::SocketError socketError)
    {
        qDebug() << "Socket error:" << socketError;
        emit socketError(socketError);
    }

private:
    QTcpSocket *socket;
};

使用示例：

LisClient *client = new LisClient(this);
connect(client, &LisClient::connected, []() {
    qDebug() << "Connected to LIS server";
});
connect(client, &LisClient::disconnected, []() {
    qDebug() << "Disconnected from LIS server";
});
connect(client, &LisClient::readyRead, [](const QString &message) {
    qDebug() << "Received message:" << message;
});
connect(client, &LisClient::socketError, [](QAbstractSocket::SocketError socketError) {
    qDebug() << "Socket error:" << socketError;
});

client->connectToServer("lis.example.com", 1234);
client->sendMessage("HELLO");