Qt的tcpserver demo

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    this->ininServer();
}

MainWindow::~MainWindow()
{
    delete ui;
}
void MainWindow::ininServer()
{
    this->listenSocket =new QTcpServer;
    this->listenSocket->listen(QHostAddress::Any,8888);
    QObject::connect(this->listenSocket,SIGNAL(newConnection()),this,SLOT(processConnection()));
}

void MainWindow::processConnection()
{
     this->readWriteSocket =this->listenSocket->nextPendingConnection();
     QObject::connect(this->readWriteSocket,SIGNAL(readyRead()),this,SLOT(processText()));
}

void MainWindow::processText()
{
    this->globalString+=this->readWriteSocket->readAll();
      ui->textEdit->setText(this->globalString);
}

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QtNetwork/QTcpServer>
#include <QtNetwork/QHostAddress>
#include <QtNetwork/QTcpSocket>

namespace Ui {
    class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
    void ininServer();

private:
    Ui::MainWindow *ui;
    QString globalString;
    QTcpServer   *listenSocket;  // 侦听套接字
    QTcpSocket   *readWriteSocket;//读写套接字
private slots:
    void  processConnection();
    void  processText();

};

#endif // MAINWINDOW_H

main.cpp

#include <QtGui/QApplication>
#include "mainwindow.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    return a.exec();
}