qt 最简单的tcp socket 连接（sever）

.pro 文件 

QT += network

sever.h

#ifndef SEVER_H
#define SEVER_H
#include <QObject>
#include <QtNetwork/QTcpServer>
#include <QtNetwork/QTcpSocket>
class sever : public QObject
{
    Q_OBJECT
public:
    explicit sever(QObject *parent = 0);
    
signals:
    
public slots:
    void slotnewconnect();
    void slotreadmesg();
public:
    QTcpServer *m_pTcpServer;
    QTcpSocket *m_pTcpSocket;
public:
    void startsever();
    void sendmessage();
};
#endif // SEVER_H
sever.cpp

#include "sever.h"
sever::sever(QObject *parent) :
    QObject(parent)
{
}
void sever::startsever()
{
    m_pTcpServer = new QTcpServer();
    m_pTcpServer->listen(QHostAddress::Any,52000);
    this->connect(m_pTcpServer,
                  SIGNAL(newConnection()),this,SLOT(slotnewconnect()));
    qDebug()<<"listening to 52000"<<endl;
}
void sever::sendmessage()
{
    QString strMesg = "hello client";
    m_pTcpSocket->write(strMesg.toStdString().c_str(),
                            strlen(strMesg.toStdString().c_str()));
}
void sever::slotnewconnect()
{
    m_pTcpSocket =  m_pTcpServer->nextPendingConnection();
    this->connect(m_pTcpSocket,
                  SIGNAL(readyRead()),this,SLOT(slotreadmesg()));
    sendmessage();
}
void sever::slotreadmesg()
{
    QByteArray qba= m_pTcpSocket->readAll();
    QString ss=QVariant(qba).toString();
    //get the client id
    QHostAddress ip = m_pTcpSocket->peerAddress();
    QString msg = ip.toString()+" : "+ss;
    qDebug()<<msg<<endl;
}

main.cpp
#include <QtCore/QCoreApplication>
#include "sever.h"
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    sever s;
    s.startsever();
    return a.exec();
}