TCP通信软件

软件功能描述实现步骤创建工程添加clientui设计控制程序 界面展示

软件功能描述

（1）TCP server 实现根据 “IP地址” 和 “端口号” 开启服务器，监听连接，收发数据功能。 （2）TCP client 实现根据 “IP地址” 和 “端口号” 连接服务器，收发数据功能。

目前只实现了一对一通信，只能有一个client，可通过动态创建socket的方式实现多个client。

实现步骤

创建工程

开发环境：Qt Creator 5.12.8 qt-opensource-windows-x86-5.12.8 下图中没展示的步骤使用默认设置即可。

添加client

现在就有了两个ui

ui设计

Server 界面：

Client界面：

控制程序

TCP.pro

QT += core gui network greaterThan(QT_MAJOR_VERSION, 4): QT += widgets CONFIG += c++11 # The following define makes your compiler emit warnings if you use # any Qt feature that has been marked deprecated (the exact warnings # depend on your compiler). Please consult the documentation of the # deprecated API in order to know how to port your code away from it. DEFINES += QT_DEPRECATED_WARNINGS # You can also make your code fail to compile if it uses deprecated APIs. # In order to do so, uncomment the following line. # You can also select to disable deprecated APIs only up to a certain version of Qt. #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0 SOURCES += \ client.cpp \ main.cpp \ server.cpp HEADERS += \ client.h \ server.h FORMS += \ client.ui \ server.ui CONFIG += c++11 # Default rules for deployment. qnx: target.path = /tmp/$${TARGET}/bin else: unix:!android: target.path = /opt/$${TARGET}/bin !isEmpty(target.path): INSTALLS += target

client.h

#ifndef CLIENT_H #define CLIENT_H #include <QWidget> #include <QTcpServer> #include <QTcpSocket> namespace Ui { class Client; } class Client : public QWidget { Q_OBJECT public: explicit Client(QWidget *parent = nullptr); ~Client(); private: Ui::Client *ui; //QTcpServer* server;//监听的套接字 QTcpSocket* client;//通信的套接字 }; #endif // CLIENT_H

server.h

#ifndef SERVER_H #define SERVER_H #include <QWidget> #include <QTcpServer> #include <QTcpSocket> QT_BEGIN_NAMESPACE namespace Ui { class Server; } QT_END_NAMESPACE class Server : public QWidget { Q_OBJECT public: Server(QWidget *parent = nullptr); ~Server(); private: Ui::Server *ui; QTcpServer* server;//监听的套接字 QTcpSocket* conn;//通信的套接字 }; #endif // SERVER_H

client.cpp

#include "client.h" #include "ui_client.h" Client::Client(QWidget *parent) : QWidget(parent), ui(new Ui::Client) { ui->setupUi(this); //ui init ui->IP->setText("192.168.50.116"); ui->PORT->setText("12321"); ui->state->setText("状态：未连接"); connect(ui->Connect, &QPushButton::clicked, this, [=]() { // init client = new QTcpSocket(this); //连接服务器 client->connectToHost(QHostAddress(ui->IP->text()),ui->PORT->text().toInt()); ui->state->setText("状态：已连接"); ui->record->append("已连接到服务器---IP：" + ui->IP->text() + " 端口：" + ui->PORT->text()); //接收数据 connect(client, &QTcpSocket::readyRead, this, [=]() { QByteArray array = client->readAll(); ui->record->append("Server: " + array); }); //发送 connect(ui->send, &QPushButton::clicked, this, [=]() { //发送数据 client->write(ui->msg->toPlainText().toUtf8()); ui->record->append("Client: " + ui->msg->toPlainText()); //clear //ui->textEdit_2->clear(); }); }); } Client::~Client() { delete ui; }

server.cpp

#include "server.h" #include "ui_server.h" Server::Server(QWidget *parent) : QWidget(parent) , ui(new Ui::Server) { ui->setupUi(this); //ui init ui->IP->setText("192.168.50.116"); ui->PORT->setText("12321"); ui->state->setText("状态：未开启"); connect(ui->OpenServer, &QPushButton::clicked, this, [=]() { //实例化 server = new QTcpServer(this); //监听 server->listen(QHostAddress(ui->IP->text()),ui->PORT->text().toInt()); ui->state->setText("状态：已开启"); //新的连接 connect(server, &QTcpServer::newConnection, this, [=]() { //接收客户端的套接字对象accept // sock_addr 结构体 == 类 QTcpSocket conn = server->nextPendingConnection(); QString str; ui->record->append("客户端接入---IP: " + conn->peerAddress().toString() +" 端口："+ str.sprintf("%d", (conn->peerPort()))); //接收数据 connect(conn, &QTcpSocket::readyRead, this, [=]() { QByteArray array = conn->readAll(); ui->record->append("Client: " + array); }); }); //发送 connect(ui->send, &QPushButton::clicked, this, [=]() { //发送数据 conn->write(ui->msg->toPlainText().toUtf8()); //char data[1024];data[0]=0xeb;data[1]=0x90; //conn->write(data,1024); ui->record->append("Server: " + ui->msg->toPlainText()); //clear //ui->textEdit_2->clear(); }); }); } Server::~Server() { delete ui; }

main.cpp

#include "server.h" #include "client.h" #include <QApplication> int main(int argc, char *argv[]) { QApplication a(argc, argv); Server w; w.setWindowTitle("TCP Server"); w.show(); Client c; c.setWindowTitle("TCP Client"); c.show(); return a.exec(); }

界面展示