帮我用qt C++搭建一个多对一的文件传输系统-QT开发中文网

搭建一个多对一的文件传输系统涉及多个部分，包括客户端和服务器之间的通信、文件选择和传输等。以下是一个简化的示例，展示了如何使用 Qt 和 C++ 实现基本的多对一文件传输系统。

项目结构

Server: 负责接收来自多个客户端的文件。
Client: 允许用户选择文件并将其发送到服务器。

1. 创建 Server

#include <QtCore>
#include <QtNetwork>

class FileServer : public QTcpServer {
    Q_OBJECT

public:
    FileServer() {
        connect(this, &QTcpServer::newConnection, this, &FileServer::onNewConnection);
    }

private slots:
    void onNewConnection() {
        QTcpSocket *clientSocket = nextPendingConnection();
        connect(clientSocket, &QTcpSocket::readyRead, this, [this, clientSocket]() {
            QByteArray fileData = clientSocket->readAll();
            QFile file("received_file");
            if (file.open(QIODevice::WriteOnly)) {
                file.write(fileData);
                file.close();
            }
            clientSocket->disconnectFromHost();
        });
    }
};

int main(int argc, char *argv[]) {
    QApplication a(argc, argv);
    FileServer server;
    server.listen(QHostAddress::Any, 1234); // Listening on port 1234
    return a.exec();
}

2. 创建 Client

#include <QApplication>
#include <QTcpSocket>
#include <QFileDialog>
#include <QPushButton>

class FileClient : public QWidget {
    Q_OBJECT

public:
    FileClient() {
        QPushButton *sendButton = new QPushButton("Send File", this);
        connect(sendButton, &QPushButton::clicked, this, &FileClient::sendFile);
        setFixedSize(200, 100);
    }

private slots:
    void sendFile() {
        QString fileName = QFileDialog::getOpenFileName(this);
        if (!fileName.isEmpty()) {
            QTcpSocket *socket = new QTcpSocket(this);
            socket->connectToHost("127.0.0.1", 1234); // Server address and port
            if (socket->waitForConnected()) {
                QFile file(fileName);
                if (file.open(QIODevice::ReadOnly)) {
                    QByteArray fileData = file.readAll();
                    socket->write(fileData);
                    socket->flush();
                    socket->waitForBytesWritten();
                    socket->disconnectFromHost();
                }
            }
        }
    }
};

int main(int argc, char *argv[]) {
    QApplication a(argc, argv);
    FileClient client;
    client.show();
    return a.exec();
}