基于QT的UDP协议的通信小程序

////////1端/////////////////////////////////////////////
////////////////main1.cpp///////////////////
#include <QApplication>
#include "udp1.h"

int main(int argc,char **argv)
{
QApplication app(argc,argv);
Dialog dlg;
dlg.show();
return app.exec();
}
///////////////udp1.h///////////////////////
#ifndef _UDP1_H_
#define _UDP1_H_

#include <QDialog.h>
#include <QTextEdit>
#include <QPushButton>
#include <UdpSocket>
#include <QGridLayout>

class Dialog :public QDialog
{
Q_OBJECT

public :
Dialog();
private:
QTextEdit *textEdit;
QPushButton *sendButton;
QPushButton *exitButton;
QUdpSocket *udpSocket;
QGridLayout *layout;
public slots:
void send_slot();
void recv_slot();
};
#endif
//////////////////udp1.cpp///////////////////////////////////////
#include "udp1.h"
#include <QtDebug>

Dialog::Dialog()
{
sendButton = new QPushButton("send");
exitButton = new QPushButton("exit");

textEdit = new QTextEdit();
layout = new QGridLayout;

layout -> addWidget(textEdit,0,0,4,6);
layout -> addWidget(sendButton,5,0,1,2);
layout -> addWidget(exitButton,5,4,1,2);
setLayout(layout);

udpSocket = new QUdpSocket;
udpSocket -> bind(QHostAddress::LocalHost,9000);

connect(sendButton,SIGNAL(clicked()),this,SLOT(send_slot()));
connect(exitButton,SIGNAL(clicked()),this,SLOT(close()))
connect(udpSocket,SIGNAL(readyRead()),this,SLOT(recv_slot()));
}

void Dialog::send_slot()
{
qDebug()<<"in send_slot";
QString str = textEdit -> toPlainText();
udpSocket -> writeDatagram(qPrintable(str),4096,QHostAddress::LocalHost,8000);
}

void Dialog::recv_slot()
{
qDebug()<<"in recv_slot()";
char buffer[4096];
udpSocker -> readDatagram(buffer,4096,0,0);
QString str(buffer);
textEdit -> setText(str);
}
/////////////2端////////////////////////////////////////////////////
////////////////////////////main2.cpp///////////////////////////////
#include <QApplication>
#include "udp2.h"

int main(int argc,char **argv)
{
QApplication app(argv,argv);
Dialog dlg;
dlg.show();
return app.exec();
}
//////////////////////////udp2.h/////////////////////////////////////
#ifndef _UDP_H_
#define _UDP_H_

#include <QDialog>
#include <QPushButton>
#include <QTextEdit>
#include <QUdpSocket>
#inlcude <QGridLayout>

class Dialog:public QDialog
{
Q_OBJECT
public:
Dialog();
private:
QPushButton *sendButton;
QPushButton *exitButton;
QTextEdit *textEdit;
QUdpSocket *udpSocket;
QGridLayout *layout;
public slots:
void send_slot();
void recv_slot();

};
#endif
//////////////////////////udp.cpp////////////////////////////////////
#include "udp2.h"
#include <QtDebug>
Dialog::Dialog()
{
sendButton = new QPushButton("send");
exitButton = new QPushButton("exit");

textEdit = new QTextEdit();

layout = new QGridLayout;

layout -> addWidget(textEdit,0,0,4,6);
layout -> addWidget(sendButton,5,0,1,2);
layout -> addWidget(exitButton,5,4,1,2);
setLayout(layout);

udpSocket = new QUdpSocket;
udpSocket -> bind(QHostAddress::LocalHost,8000);

connect(sendButton,SIGNAL(clicked()),this,SLOT(send_slot()));
connect(exitButton,SIGNAL(clicked()),this,SLOT(close()));
connect(udpSocket,SIGNAL(readyRead()),this,SLOT(recv_slot()));
}

void Dialog::send_slot()
{
qDebug()<<"in send_slot";
QString str = textEdit -> toPlainText();
udpSocket -> writeDatagram(qPrintable(str),4096,QHostAddress::LocalHost, 9000);
// udpSocket -> writeDatagram(qPrintable(textEdit -> toPlainText()), 256, QHostAddress::LocalHost, 9000);
}

void Dialog::recv_slot()
{
qDebug()<<"in recv_slot";
char buffer[4096];
udpSocket ->readDatagram(buffer,4096,0,0);
QString str(buffer);
textEdit -> setText(str);
}