QT socket通讯客户端与服务端实例

qt通讯很简单,主要是利用socket通讯,网上有很多案例,案例稍有漏洞,我自己稍加改善,可实现一对一的收发,如下

QT += network

 具体效果如下

 

 

client.h

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QTcpSocket>

QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE

class Widget : public QWidget
{
    Q_OBJECT

public:
    Widget(QWidget *parent = nullptr);
    ~Widget();

private slots:
    void on_pushButton_3_clicked();

    void on_pushButton_clicked();

    void on_pushButton_2_clicked();

    void connectToServer();
    void readInformation();



private:
    Ui::Widget *ui;

    QTcpSocket *tcpsocket= NULL;
};
#endif // WIDGET_H　　

 

 

client.cpp

#include "widget.h"
#include "ui_widget.h"

#include <QHostAddress>
Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);

}

Widget::~Widget()
{
    delete ui;
}



//写socket
void Widget::on_pushButton_clicked()
{
    QString str = ui->textEditWrite->toPlainText();
    tcpsocket->write(str.toUtf8().data());
}

//主动断开链接
void Widget::on_pushButton_2_clicked()
{
    if(tcpsocket == NULL)return;
    tcpsocket->disconnectFromHost();//主动和客户端断开连接
    tcpsocket->close();
    tcpsocket = NULL;
    //if(tcpsocket == NULL) ui->textEditRead->append("已断开链接");
}

//已经连接到服务器
void Widget::connectToServer()
{
    ui->textEditRead->setText("成功和服务器进行连接");
}

//从通道读取数据
void Widget::readInformation()
{
    QByteArray temp = tcpsocket->readAll();
    ui->textEditRead->append(temp);
}

//创建链接
void Widget::on_pushButton_3_clicked()
{
    QString ip = ui->lineEditIpAddress->text();
    qint16 port = ui->lineEditPort->text().toInt();

    if(tcpsocket != NULL){tcpsocket->deleteLater();tcpsocket=NULL;}
    tcpsocket = new QTcpSocket();
    connect(tcpsocket, &QTcpSocket::connected, this, &Widget::connectToServer);
    connect(tcpsocket, &QTcpSocket::readyRead, this, &Widget::readInformation);
    connect(tcpsocket, &QTcpSocket::disconnected, this, [this](){
        ui->textEditRead->append("已断开链接");
    });
    //主动和服务器进行连接
    tcpsocket->connectToHost((QHostAddress)ip, port);


}

 

　　

server.h

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>

#include <QTcpServer>
#include <QTcpSocket>

QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE

class Widget : public QWidget
{
    Q_OBJECT

public:
    Widget(QWidget *parent = nullptr);
    ~Widget();

private slots:
    void on_pushButton_clicked();

    void on_pushButton_2_clicked();

    void connectToClient();
    void readInformation();

    void on_pushButton_3_clicked();

private:
    Ui::Widget *ui;

    QTcpServer *tcpserver = NULL  ;
    QTcpSocket *tcpsocket = NULL;
};
#endif // WIDGET_H

 

 

 

server.cpp

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);

}

Widget::~Widget()
{
    delete ui;
}


//创建链接
void Widget::connectToClient()
{
    if(tcpsocket != NULL){tcpsocket->deleteLater();tcpsocket=NULL;}
    tcpsocket = tcpserver->nextPendingConnection();
    connect(tcpsocket, &QTcpSocket::readyRead, this, &Widget::readInformation);
    connect(tcpsocket, &QTcpSocket::disconnected, this, [this](){
        ui->textEditRead->append("已断开链接");
    });
    QString ip = tcpsocket->peerAddress().toString();
    qint16 port = tcpsocket->peerPort();
    ui->textEditRead->setText(QString("[%1:%2]连接成功").arg(ip).arg(port));

}

//从通道读取数据
void Widget::readInformation()
{
    QByteArray temp = tcpsocket->readAll();
    ui->textEditRead->append(temp);
}

//向通道写数据
void Widget::on_pushButton_clicked()
{
    QString str = ui->textEditWrite->toPlainText();
    tcpsocket->write(str.toUtf8().data());
}

//客户端主动断开链接
void Widget::on_pushButton_2_clicked()
{
    if(tcpsocket == NULL)return;
    tcpsocket->disconnectFromHost();//主动和客户端断开连接
    tcpsocket->close();
    tcpsocket->deleteLater();
    tcpsocket = NULL;
    //if(tcpsocket == NULL) ui->textEditRead->append("已断开链接");
}


//创建监听
void Widget::on_pushButton_3_clicked()
{
    if(tcpserver!=NULL){on_pushButton_2_clicked();tcpserver->deleteLater();tcpserver = NULL;}
    //if(tcpserver!=NULL){tcpserver->deleteLater();tcpserver = NULL;}
    //if(tcpserver!=NULL){tcpserver = NULL;}
    tcpserver = new QTcpServer(this);
    int port = ui->lineEditListenPort->text().toInt();
    tcpserver->listen(QHostAddress::Any, port);
    connect(tcpserver, &QTcpServer::newConnection, this, &Widget::connectToClient);
}

　　

 下载链接:

https://files.cnblogs.com/files/RYSBlog/socket_demo.zip

如果觉得可以的话,给个一键三连呗