Qt之socket通讯

1、编译环境

Qt5.6+VS2013

1、运用VS创建Qt项目时，选择Network：

注：用QtCreator建立项目，需要在.pro文件中，引入NetWork模块

2、服务器端代码

sever_tcp.h

#ifndef SEVER_TCP_H
#define SEVER_TCP_H

#include 
#include "ui_sever_tcp.h"
#include


class sever_tcp : public QMainWindow
{
	Q_OBJECT

public:
	sever_tcp(QWidget *parent = 0);
	~sever_tcp();
	QTcpSocket* m_socket = NULL;//定义通讯套接字
	QTcpServer* m_server = NULL;
	
	void Server_New_Connect();//收到客户端连接请求 处理
	void socket_Read_Data();//收到客户端发送消息处理
	void socket_Disconnect();//客户端断开连接处理
private slots:
	void My_Server_Start();
	void My_Send_Info();
private:
	Ui::sever_tcpClass ui;
};

#endif // SEVER_TCP_H

sever_tcp.cpp

#include "sever_tcp.h"
#pragma execution_character_set("utf-8")
sever_tcp::sever_tcp(QWidget *parent)
	: QMainWindow(parent)
{
	ui.setupUi(this);
	m_server = new QTcpServer();
	m_socket = new QTcpSocket();
	connect(this->m_server, &QTcpServer::newConnection, this, &sever_tcp::Server_New_Connect);//将服务器端收到新连接的信号绑定槽函数
	
}
void sever_tcp::My_Server_Start()
{
	
	if (ui.Server_Start_Bt->text() == "开启")
	{
		qDebug() << "启动服务器";
		QHostAddress IP("192.168.1.53");//绑定服务器的IP地址
		quint16 server_port = 8002;//设置监听端口
		if (m_server->listen(IP, server_port))//判断监听端口是否正常打开
		{
			qDebug() << "开启监听";
			ui.Server_Start_Bt->setText("关闭");
		}
		else
		{
			qDebug() << "监听失败";
			ui.Server_Start_Bt->setText("开启");
		}
		return;
	}
	if (ui.Server_Start_Bt->text() == "关闭")
	{
		qDebug() << "关闭连接";
		ui.Server_Start_Bt->setText("开启");
	}
	return;
}
void sever_tcp::Server_New_Connect()
{
	qDebug() << "收到新连接";
	m_socket = m_server->nextPendingConnection();//获取客户端连接
	QObject::connect(m_socket, &QTcpSocket::readyRead, this, &sever_tcp::socket_Read_Data);//绑定客户发送消息信号，及客户端发送信息后，触发readyRead信号
	QObject::connect(m_socket, &QTcpSocket::disconnected, this, &sever_tcp::socket_Disconnect);//绑定客户端断开请求信号，客户端断开连接后，触发disconnected信号
}
void sever_tcp::socket_Read_Data()
{
	qDebug() << "收送消息";
	QString buffer;
	buffer = m_socket->readAll();//读取客户端发送的消息
	ui.plainTextEdit->setPlainText(buffer);
}

void sever_tcp::socket_Disconnect()
{
	qDebug() << "客户端断开连接";
}

void sever_tcp::My_Send_Info()
{
	qDebug() << "发送消息";
	QString buffer = ui.textEdit->toPlainText();
	qint64 writeResult = m_socket->write(buffer.toLatin1()+'\n');//向客户端发送消息，如果客户端用readLine（）读取消息，末尾一定要加上'\n'
	bool BoolFlush = m_socket->flush();//刷新socket的缓存区
	if (writeResult != -1 && BoolFlush == 1)
	{
		qDebug() << "发送消息成功";
	}

}
sever_tcp::~sever_tcp()
{
	m_server->close();
	m_server->deleteLater();
}

3、客户端代码

client.h

#ifndef CLIENT_H
#define CLIENT_H

#include 
#include "ui_client.h"
#include
class client : public QMainWindow
{
	Q_OBJECT

public:
	client(QWidget *parent = 0);
	~client();
	QTcpSocket* m_socket=NULL;
private slots:
	void connect_server();
	void send_server();
	void readyread();
private:
	Ui::clientClass ui;
};

#endif // CLIENT_H

client.cpp

#include "client.h"
#include
#include
#include
#pragma execution_character_set("utf-8")
client::client(QWidget *parent)
	: QMainWindow(parent)
{
	ui.setupUi(this);
	m_socket = new QTcpSocket;
    //绑定接收到服务器消息信号，服务器发送消息后触发readyRead信号
	connect(this->m_socket, SIGNAL(readyRead()), this, SLOT(readyread()));
    //connect(m_socket, &QTcpSocket::readyRead, this, &client::readyread);
	qDebug() << "你好";
	
}
void client::readyread()
{
	QString buffer;
	buffer = m_socket->readAll();//读取服务器数据
	qDebug() << buffer;
	qDebug() << "read_server";
	
}
void client::connect_server()
{
	m_socket->connectToHost("192.168.1.53", 8002);//向服务器发起连接请求
	qDebug() << "connect_server";
}
void client::send_server()
{
	m_socket->write("你好服务器\n");//向服务器发送消息
	qDebug() << "send_server";
}
client::~client()
{

}