QTcpSocket和QTcpServer实现聊天小工具

• • 一、说明
  • 二、效果
  • 三、核心代码

一、说明

说明：有一段时间没有使用socket编程了，这两天抽时间使用QtcpSocket和QTcpServer写了一个简单的聊天小工具。

二、效果

效果截图如下：

三、核心代码

/***************************ServerWidget.cpp*************************/
#include "ServerWidget.h"
#include "ui_ServerWidget.h"

ServerWidget::ServerWidget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::ServerWidget)
{
    ui->setupUi(this);
    m_tcpServer = NULL;
    m_tcpSocket = NULL;

    m_tcpServer = new QTcpServer(this);
    m_tcpServer->listen(QHostAddress::Any,8899);
    connect(m_tcpServer,SIGNAL(newConnection()),this,SLOT(dealConnectClient()));

}

ServerWidget::~ServerWidget()
{
    if(m_tcpServer != NULL)
    {
        m_tcpServer->close();
        m_tcpServer = NULL;
    }

    if(m_tcpSocket != NULL)
    {
        m_tcpSocket->disconnectFromHost();
        m_tcpSocket->close();
        m_tcpSocket = NULL;
    }
    delete ui;
}

// 服务器和客户端建立连接
void ServerWidget::dealConnectClient()
{
    if(NULL == m_tcpServer)
        return;

    m_tcpSocket = m_tcpServer->nextPendingConnection();
    QString ip = m_tcpSocket->peerAddress().toString();
    quint16 port = m_tcpSocket->peerPort();
    QString tempText = QString("和客户端%1:%2连接成功!").arg(ip).arg(port);

    ui->textEditRcv->setTextColor(QColor("cyan"));
    ui->textEditRcv->append("server:"+tempText);

    /// 这个信号与槽的连接必须放在这，放在构造函数中不行，因为在构造函数中时，m_tcpSocket=NULL连接不成功
    connect(m_tcpSocket,SIGNAL(readyRead()),this,SLOT(dealReadData()));
}

// 服务器接收客户端数据
void ServerWidget::dealReadData()
{
    if(NULL == m_tcpSocket)
        return;

    QByteArray readByteData = m_tcpSocket->readAll();

    ui->textEditRcv->setTextColor(QColor("red"));
    ui->textEditRcv->append("client:" + readByteData);
}

// 服务器写数据
void ServerWidget::on_pushButton_clicked()
{
    if(NULL == m_tcpSocket)
        return;

    QString sendText = ui->textEditSend->toPlainText();
    m_tcpSocket->write(sendText.toUtf8().data());

    ui->textEditRcv->setTextColor(QColor("cyan"));
    ui->textEditRcv->append("server:"+sendText);
}

// 服务器与客户端断开连接
void ServerWidget::on_pushButton_2_clicked()
{
    if(NULL == m_tcpSocket)
        return;

    QString ip = m_tcpSocket->peerAddress().toString();
    quint16 port = m_tcpSocket->peerPort();
    QString tempText = QString("和客户端%1:%2断开连接成功!").arg(ip).arg(port);
    ui->textEditRcv->setTextColor(QColor("cyan"));
    ui->textEditRcv->append("server:"+tempText);

    m_tcpSocket->disconnectFromHost();
    m_tcpSocket->close();
    m_tcpSocket = NULL;
}

/***************************ClientWidget.cpp*************************/
#include "ClientWidget.h"
#include "ui_ClientWidget.h"


ClientWidget::ClientWidget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::ClientWidget)
{
    ui->setupUi(this);
    m_tcpSocket = NULL;
    m_tcpSocket = new QTcpSocket(this);

    connect(m_tcpSocket,SIGNAL(connected()),this,SLOT(dealConnectServer()));
    connect(m_tcpSocket,SIGNAL(readyRead()),this,SLOT(dealReadData()));
}


ClientWidget::~ClientWidget()
{
    if(m_tcpSocket != NULL)
    {
        m_tcpSocket->disconnectFromHost();
        m_tcpSocket->close();
        m_tcpSocket = NULL;
    }
    delete ui;
}

// 断开连接
void ClientWidget::on_pushButton_clicked()
{
    if(NULL == m_tcpSocket)
        return;

    ui->textEdit->setTextColor(QColor("cyan"));
    ui->textEdit->append("client:和服务器断开连接成功!");

    m_tcpSocket->disconnectFromHost();
    m_tcpSocket->close();
    m_tcpSocket = NULL;
}


// 客户端写数据
void ClientWidget::on_pushButton_2_clicked()
{
    if(NULL == m_tcpSocket)
        return;

    QString sendText = ui->textEdit_2->toPlainText();
    m_tcpSocket->write(sendText.toUtf8().data());

    ui->textEdit->setTextColor(QColor("cyan"));
    ui->textEdit->append("client:"+sendText);
}

// 客户端连接服务器
void ClientWidget::on_pushButton_3_clicked()
{
    if(NULL == m_tcpSocket)
        return;

    QString ip = ui->lineEdit->text();
    QString port = ui->lineEdit_2->text();
    m_tcpSocket->connectToHost(ip,port.toInt());
}

// 提示连接成功
void ClientWidget::dealConnectServer()
{
    ui->textEdit->setTextColor(QColor("cyan"));
    ui->textEdit->append("client:和服务器建立连接成功!");
}

// 客户端从socket中读取数据
void ClientWidget::dealReadData()
{
    if(NULL == m_tcpSocket)
        return;

    QByteArray readText = m_tcpSocket->readAll();
    ui->textEdit->setTextColor(QColor("red"));
    ui->textEdit->append("server:"+readText);
}
           

源码下载地址：http://download.csdn.net/download/toby54king/10153873