Linux qt5 socket（TCP）编程

旧城等待， 2022-04-24 09:42 360阅读 0赞

1\_server.cpp

#include <QWidget>
    #include <QTcpServer> //监听套接字
    #include <QTcpSocket> //通信套接字
    
    namespace Ui {
    class ServerWidget;
    }
    
    class ServerWidget : public QWidget
    {
        Q_OBJECT
    
    public:
        explicit ServerWidget(QWidget *parent = 0);
        ~ServerWidget();
    
    private slots:
        void on_buttonSend_clicked();
    
        void on_buttonClose_clicked();
    
    private:
        Ui::ServerWidget *ui;
    
        QTcpServer *tcpServer; //监听套接字
        QTcpSocket *tcpSocket; //通信套接字
    
    };
    
    ServerWidget::ServerWidget(QWidget *parent) :
        QWidget(parent),
        ui(new Ui::ServerWidget)
    {
        ui->setupUi(this);
    
        tcpServer = NULL;
        tcpSocket = NULL;
    
        //监听套接字，指定父对象，让其自动回收空间
        tcpServer = new QTcpServer(this);
    
        tcpServer->listen(QHostAddress::Any, 8888);
    
        setWindowTitle("服务器: 8888");
    
        connect(tcpServer, &QTcpServer::newConnection,
                [=]()
                {
                    //取出建立好连接的套接字
                    tcpSocket = tcpServer->nextPendingConnection();
    
                    //获取对方的IP和端口
                    QString ip = tcpSocket->peerAddress().toString();
                    qint16 port = tcpSocket->peerPort();
                    QString temp = QString("[%1:%2]:成功连接").arg(ip).arg(port);
    
                    ui->textEditRead->setText(temp);
    
                    connect(tcpSocket, &QTcpSocket::readyRead,
                            [=]()
                            {
                                //从通信套接字中取出内容
                                QByteArray array = tcpSocket->readAll();
                                ui->textEditRead->append(array);
                            }
    
                            );
    
    
                }
    
                );
    
    }
    
    ServerWidget::~ServerWidget()
    {
        delete ui;
    }
    
    void ServerWidget::on_buttonSend_clicked()
    {
        if(NULL == tcpSocket)
        {
            return;
        }
        //获取编辑区内容
        QString str = ui->textEditWrite->toPlainText();
        //给对方发送数据， 使用套接字是tcpSocket
        tcpSocket->write( str.toUtf8().data() );
    
    }
    
    void ServerWidget::on_buttonClose_clicked()
    {
        if(NULL == tcpSocket)
        {
            return;
        }
    
        //主动和客户端端口连接
        tcpSocket->disconnectFromHost();
        tcpSocket->close();
        tcpSocket = NULL;
    }

2\_client.cpp

#include <QWidget>
    #include <QTcpSocket> //通信套接字
    
    namespace Ui {
    class ClientWidget;
    }
    
    class ClientWidget : public QWidget
    {
        Q_OBJECT
    
    public:
        explicit ClientWidget(QWidget *parent = 0);
        ~ClientWidget();
    
    private slots:
        void on_buttonConnect_clicked();
    
        void on_buttonSend_clicked();
    
        void on_buttonClose_clicked();
    
    private:
        Ui::ClientWidget *ui;
    
        QTcpSocket *tcpSocket; //通信套接字
    };
    
    
    #include <QHostAddress>
    
    ClientWidget::ClientWidget(QWidget *parent) :
        QWidget(parent),
        ui(new Ui::ClientWidget)
    {
        ui->setupUi(this);
    
        tcpSocket = NULL;
    
        //分配空间，指定父对象
        tcpSocket = new QTcpSocket(this);
    
        setWindowTitle("客户端");
    
    
        connect(tcpSocket, &QTcpSocket::connected,
                [=]()
                {
                    ui->textEditRead->setText("成功和服务器建立好连接");
                }
                );
    
        connect(tcpSocket, &QTcpSocket::readyRead,
                [=]()
                {
                    //获取对方发送的内容
                    QByteArray array = tcpSocket->readAll();
                    //追加到编辑区中
                    ui->textEditRead->append(array);
                }
    
                );
    
    }
    
    ClientWidget::~ClientWidget()
    {
        delete ui;
    }
    
    void ClientWidget::on_buttonConnect_clicked()
    {
        //获取服务器ip和端口
        QString ip = ui->lineEditIP->text();
        qint16 port = ui->lineEditPort->text().toInt();
    
        //主动和服务器建立连接
        tcpSocket->connectToHost(QHostAddress(ip), port);
    
    }
    
    void ClientWidget::on_buttonSend_clicked()
    {
        //获取编辑框内容
        QString str = ui->textEditWrite->toPlainText();
        //发送数据
        tcpSocket->write( str.toUtf8().data() );
    
    }
    
    void ClientWidget::on_buttonClose_clicked()
    {
        //主动和对方断开连接
        tcpSocket->disconnectFromHost();
        tcpSocket->close();
    }