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

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#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

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#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

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#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

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#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