网络通信（socket）

 

服务端

---

scoket.h

#ifndef SOCKET_H
#define SOCKET_H

#pragma execution_character_set("utf-8")
#include 
#include  
#include 
#include
#include "ui_socket.h"

class Socket : public QWidget
{
	Q_OBJECT

public:
	Socket(QWidget *parent = 0, Qt::WFlags flags = 0);
	~Socket();

private:
	Ui::SocketClass ui;

	QTcpServer *tcpSever;//监听套接字
	QTcpSocket *tcpSocket; //通信套接字

public slots:
	void fun();
	void get_message() ;
	void send_message();
	void close_clicked();
};

#endif // SOCKET_H

 

scoket.cpp

#include "socket.h"

Socket::Socket(QWidget *parent, Qt::WFlags flags)
	: QWidget(parent, flags)
{
	ui.setupUi(this);
	setWindowTitle(QString::fromUtf8("服务端 ,端口8888"));
	
	tcpSocket = NULL;
	tcpSever = NULL;
	
	tcpSever = new QTcpServer(this) ;
	//监听地址，和8888端口
	tcpSever->listen(QHostAddress::Any, 8888) ;
	
	//如果有客户端连接成功，进入fun函数
	connect(tcpSever, SIGNAL(newConnection()), this, SLOT(fun()));
}

Socket::~Socket()
{

}



void Socket::fun()
{
	//取出建立好的套接字
	tcpSocket = tcpSever->nextPendingConnection() ;

	//获取对方的IP和端口
	QString ip = tcpSocket->peerAddress().toString();
	qint16 prot = tcpSocket->peerPort();

	QString temp = QString(QString::fromUtf8("[%1：%2]:成功连接")).arg(ip).arg(prot);
	ui.textEditRead->setText(temp) ;

	//有消息发过来，就会触发readyRead信号
	connect(tcpSocket, SIGNAL(readyRead()), this, SLOT(get_message())) ;
}

void Socket::get_message()
{
	//将信号显示到read文本框
	QByteArray array = tcpSocket->readAll();
	ui.textEditRead->append(array);
}

void Socket::send_message()
{
	//向socket写数据
	if(tcpSocket == NULL)
		return ;
	QString str = ui.textEditWrite->toPlainText();

	tcpSocket->write(str.toUtf8().data());
}

void Socket::close_clicked()
{
	if(tcpSocket == NULL)
		return ;
	//断开连接
	tcpSocket->disconnectFromHost();
	tcpSocket->close();

	tcpSocket = NULL;
}

 

客户端

---

client.h

#ifndef CLIENT_H
#define CLIENT_H

#pragma execution_character_set("utf-8")

#include 
#include 
#include "ui_client.h"

class Client : public QWidget
{
	Q_OBJECT

public:
	Client(QWidget *parent = 0, Qt::WFlags flags = 0);
	~Client();

private:
	Ui::ClientClass ui;

	QTcpSocket *tcpSocket;

	public slots:
		void set_message();
		void connect_to_sever();
		void send_message();
		void get_message();
		void close_clicked();
};

#endif // CLIENT_H

client.cpp

#include "client.h"

Client::Client(QWidget *parent, Qt::WFlags flags)
	: QWidget(parent, flags)
{
	ui.setupUi(this);
	setWindowTitle(QString::fromUtf8("客户端")) ;
	tcpSocket = NULL;

	tcpSocket = new QTcpSocket(this);
	
	connect(tcpSocket, SIGNAL(connected()), this, SLOT(set_message())) ;

	connect(tcpSocket, SIGNAL(readyRead()), this, SLOT(get_message()));
}

Client::~Client()
{

}

void Client::set_message()
{
	ui.textEditReader->setText("succed connect");
}

void Client::connect_to_sever()
{
	//获取服务器ip和端口
	QString ip = ui.lineEditIp->text();
	qint16 port = ui.lineEditprot->text().toInt();

	tcpSocket->connectToHost(ip, port);
}

void Client::send_message()
{
	// 向socket写数据
	QString str = ui.textEditWrite->toPlainText();
	tcpSocket->write(str.toUtf8().data());
}

void Client::get_message()
{
	QByteArray array = tcpSocket->readAll();

	ui.textEditReader->append(array);
}

void Client::close_clicked()
{
	tcpSocket->disconnectFromHost();
	tcpSocket->close();
}