服务端

 // 自定义如下
private:QTcpServer *tcpserver; //TCP服务器QTcpSocket *tcpsocket;// TCP通讯socketQString GetLocalIpAddress(); // 获取本机的IP地址private slots:void clientconnect();void clientdisconnect();void socketreaddata();void newconnection();void on_pushButton_Start_clicked();void on_pushButton_Stop_clicked();void on_pushButton_Send_clicked();protected:void closeEvent(QCloseEvent *event);

#include "mainwindow.h"
#include "ui_mainwindow.h"#include <QMessageBox>
#pragma execution_character_set("utf-8")
MainWindow::MainWindow(QWidget *parent): QMainWindow(parent), ui(new Ui::MainWindow)
{ui->setupUi(this);QString strip=GetLocalIpAddress();// QMessageBox::information(this,"数据",strip,QMessageBox::Yes);ui->comboBoxIp->addItem(strip);tcpserver=new QTcpServer(this);connect(tcpserver,SIGNAL(newConnection()),this,SLOT(newconnection()));}MainWindow::~MainWindow()
{delete ui;
}void MainWindow::on_pushButton_Start_clicked()
{QString ip=ui->comboBoxIp->currentText();quint16 port=ui->spinBoxPort->value();QHostAddress address(ip);tcpserver->listen(address,port);ui->plainTextEdit_DispMsg->appendPlainText("$$$$$$$$$$开始监听$$$$$$$$$$");ui->plainTextEdit_DispMsg->appendPlainText("$$$$$$$$$$服务器地址$$$$$$$$$$："+tcpserver->serverAddress().toString());ui->plainTextEdit_DispMsg->appendPlainText("$$$$$$$$$$服务器端口$$$$$$$$$$："+QString::number(tcpserver->serverPort()));ui->pushButton_Start->setEnabled(false);ui->pushButton_Stop->setEnabled(true);}void MainWindow::on_pushButton_Stop_clicked()
{if(tcpserver->isListening()){tcpserver->close();ui->pushButton_Start->setEnabled(true);ui->pushButton_Stop->setEnabled(false);}}void MainWindow::on_pushButton_Send_clicked()
{QString strmsg=ui->lineEdit_InputMsg->text();ui->plainTextEdit_DispMsg->appendPlainText("[out]:"+strmsg);ui->lineEdit_InputMsg->clear();QByteArray str=strmsg.toUtf8();str.append("\n");tcpsocket->write(str);
}QString MainWindow::GetLocalIpAddress() // 获取本机的IP地址
{QString hostname=QHostInfo::localHostName();QHostInfo hostinfo=QHostInfo::fromName(hostname);QString localip="";QList<QHostAddress> addresslist=hostinfo.addresses();if(!addresslist.isEmpty()){for (int i=0;i<addresslist.count();i++){QHostAddress addrhost=addresslist.at(i);if(QAbstractSocket::IPv4Protocol==addrhost.protocol()){localip=addrhost.toString();break;}}}return localip;
}void MainWindow::clientconnect()
{// 客户端连接ui->plainTextEdit_DispMsg->appendPlainText("**********客户端socket连接**********");ui->plainTextEdit_DispMsg->appendPlainText("**********peer address:"+tcpsocket->peerAddress().toString());ui->plainTextEdit_DispMsg->appendPlainText("**********peer port:"+QString::number(tcpsocket->peerPort()));}void MainWindow::clientdisconnect()
{// 客户端断开连接ui->plainTextEdit_DispMsg->appendPlainText("**********客户端socket断开连接**********");tcpsocket->deleteLater();}void MainWindow::socketreaddata()
{// 读取数据while(tcpsocket->canReadLine())ui->plainTextEdit_DispMsg->appendPlainText("[in]"+tcpsocket->readLine());}void MainWindow::newconnection()
{tcpsocket=tcpserver->nextPendingConnection();connect(tcpsocket,SIGNAL(connected()),this,SLOT(clientconnect()));clientconnect();connect(tcpsocket,SIGNAL(disconnected()),this,SLOT(clientdisconnect()));connect(tcpsocket,SIGNAL(readyRead()),this,SLOT(socketreaddata()));connect(tcpsocket,SIGNAL(stateChanged(QAbstractSocket::SocketState)),this,SLOT(OnSocketStateChanged(QAbstractSocket::SocketState)));}void MainWindow::closeEvent(QCloseEvent *event)
{if(tcpserver->isListening())tcpserver->close();event->accept();
}

 客户端

private:QTcpSocket *tcpclient;//客户端tcpclientQString getLocalIp();//获取本机IP地址protected:void closeEvent(QCloseEvent *event);private slots:void connectFunc();void disConnectFunc();void socketReadData();void on_pushButton_Connect_clicked();void on_pushButton_DisConnect_clicked();void on_pushButton_Send_clicked();

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include<QDebug>
#pragma execution_character_set("utf-8")
MainWindow::MainWindow(QWidget *parent): QMainWindow(parent), ui(new Ui::MainWindow)
{ui->setupUi(this);tcpclient=new QTcpSocket(this);QString strip=getLocalIp();ui->comboBoxIp->addItem(strip);connect(tcpclient,SIGNAL(connected()),this,SLOT(connectFunc()));connect(tcpclient,SIGNAL(disconnected()),this,SLOT(disConnectFunc()));connect(tcpclient,SIGNAL(readyRead()),this,SLOT(socketReadData()));}MainWindow::~MainWindow()
{delete ui;
}
//获取本机IP
QString MainWindow::getLocalIp()
{QString hostname=QHostInfo::localHostName();QHostInfo hostinfo=QHostInfo::fromName(hostname);QString localip="";QList<QHostAddress> addlist=hostinfo.addresses();if(!addlist.isEmpty()){for(int i=0;i<addlist.count();i++){QHostAddress ahost=addlist.at(i);if(QAbstractSocket::IPv4Protocol==ahost.protocol()){localip=ahost.toString();break;}}}return localip;
}void MainWindow::closeEvent(QCloseEvent *event)
{if(tcpclient->state()==QAbstractSocket::ConnectedState){tcpclient->disconnectFromHost();}event->accept();
}void MainWindow::connectFunc()
{ui->plainTextEdit_DispMsg->appendPlainText("*********已连接到服务器*********");ui->plainTextEdit_DispMsg->appendPlainText("*********peer address:"+tcpclient->peerAddress().toString());ui->plainTextEdit_DispMsg->appendPlainText("*********peer port:"+QString::number(tcpclient->peerPort()));ui->pushButton_Connect->setEnabled(false);ui->pushButton_DisConnect->setEnabled(true);
}void MainWindow::disConnectFunc()
{ui->plainTextEdit_DispMsg->appendPlainText("*********已断开与服务器的连接*********");ui->pushButton_Connect->setEnabled(true);ui->pushButton_DisConnect->setEnabled(false);
}void MainWindow::socketReadData()
{while(tcpclient->canReadLine()){qDebug()<<123;ui->plainTextEdit_DispMsg->appendPlainText("[in]:"+tcpclient->readLine());}
}void MainWindow::on_pushButton_Connect_clicked()
{QString addr=ui->comboBoxIp->currentText();quint16 port=ui->spinBoxPort->value();tcpclient->connectToHost(addr,port);
}void MainWindow::on_pushButton_DisConnect_clicked()
{if(tcpclient->state()==QAbstractSocket::ConnectedState){tcpclient->disconnectFromHost();}
}void MainWindow::on_pushButton_Send_clicked()
{QString strmsg=ui->lineEdit_InputMsg->text();ui->plainTextEdit_DispMsg->appendPlainText("[out]:"+strmsg);ui->lineEdit_InputMsg->clear();QByteArray str=strmsg.toUtf8();str.append('\n');tcpclient->write(str);qDebug()<<str;}