運行截圖如下：

cmd遠程登錄端口號為7

登錄后，輸入數據，服務器進行回顯

Qt服務器：

代碼如下：

echoserver.h

#ifndef ECHOSERVER_H #define ECHOSERVER_H#include <QObject> #include <QTcpServer>class EchoServer : public QTcpServer {Q_OBJECT public:explicit EchoServer(QObject *parent = 0);~EchoServer();signals:public slots:protected slots:void onNewConnection();void onReadyRead();private:void echo(QTcpSocket *sock); };#endif // ECHOSERVER_H

echoserver.cpp

#include "echoserver.h"#include <QTcpSocket>EchoServer::EchoServer(QObject *parent) : QTcpServer(parent) {connect(this,SIGNAL(newConnection()),this,SLOT(onNewConnection())); }EchoServer::~EchoServer() {}void EchoServer::onNewConnection() {while(hasPendingConnections()){QTcpSocket *socket=nextPendingConnection();connect(socket,SIGNAL(readyRead()),this,SLOT(onReadyRead()));connect(socket,SIGNAL(disconnected()),socket,SLOT(deleteLater()));if(socket->bytesAvailable()>0){echo(socket);}} }void EchoServer::onReadyRead() {QTcpSocket *sock=qobject_cast<QTcpSocket*>(sender());//取得當前獲取數據的socket對象，這個sender就是獲取發射信號的對象echo(sock); }void EchoServer::echo(QTcpSocket *sock) {QByteArray inData=sock->readAll();qDebug()<<inData;sock->write(inData);sock->flush(); }

main.cpp

#include <QApplication> #include "echoserver.h"int main(int argc, char *argv[]) {QApplication a(argc, argv);EchoServer server;server.listen(QHostAddress::Any,7);return a.exec(); }

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