QT之简易的聊天工具的实现（Socket通信）

想着练习一下QT，做一个简单的小程序。

突然就想到做一个聊天工具，这个实现起来很简单，没有复杂的关系。

主要实现客户端和服务器简单交互，可以发送字母、数字、汉字。

界面设计比较简单，后续再有功能再作更新。

写了一个简单的登录界面，用户名和密码是死的，因为没有添加数据库。

主要实现是server创建socket对象后，一直处于监听状态，等待客户端的连接请求，

连接成功后，实现简易的数据读写，（先启动server哦！）

登录界面如下：mainwindows

聊天界面如下：mainwin_1

整体界面简单，稍微看一下代码就能明白！

server端的代码：

mainwin_1.h + mainwindows.h:

//mainwindows.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H#include <QMainWindow>
#include <mainwin_1.h>namespace Ui {
class MainWindow;
}class MainWindow : public QMainWindow
{Q_OBJECTpublic:explicit MainWindow(QWidget *parent = 0);MainWin_1 *mainwin;   //UI of chat~MainWindow();private slots:void on_pushButton_clicked();//loginvoid on_pushButton_2_clicked();//cancelprivate:Ui::MainWindow *ui;
};#endif // MAINWINDOW_H//  mainwin_1.h--------------------------------------------------------
#ifndef MAINWIN_1_H
#define MAINWIN_1_H#include <QMainWindow>
#include <QTcpServer>
#include <QTcpSocket>namespace Ui {
class MainWin_1;
}class MainWin_1 : public QMainWindow
{Q_OBJECTpublic:explicit MainWin_1(QWidget *parent = 0);~MainWin_1();private slots:void on_pushButton_clicked();  //listen in client, send the newsvoid server_NEW_Connect();     //accept the client signal and connectvoid socket_Read_Data();       //read the client newsvoid socket_Disconnect();      //disconnectprivate:void my_connect();private:Ui::MainWin_1 *ui;QTcpServer *server; //create server objectQTcpSocket *socket; //create clirnt object
};#endif // MAINWIN_1_H

main.cpp + mainwin_1.cpp + mainwindows.cpp:

//main.cpp
#include "mainwindow.h"
#include <QApplication>
#include "QTextCodec"int main(int argc, char *argv[])
{QApplication a(argc, argv);MainWindow w;QTextCodec::setCodecForTr( QTextCodec::codecForName("GBK"));QTextCodec::setCodecForCStrings( QTextCodec::codecForName("GBK") );//w.setWindowIcon(QIcon(":/QQ.png"));w.show();return a.exec();
}//mainwin_1.cpp----------------------------------------------------------
#include "mainwin_1.h"
#include "ui_mainwin_1.h"
#include "QMessageBox"
#include "QDebug"
#include "QString"
#include "QDateTime"
#include "QTextCodec"MainWin_1::MainWin_1(QWidget *parent) :QMainWindow(parent),ui(new Ui::MainWin_1)
{ui->setupUi(this);setWindowTitle(tr("QQ"));server = new QTcpServer();connect(server, SIGNAL(newConnection()), this, SLOT(server_NEW_Connect()));my_connect();
}MainWin_1::~MainWin_1()
{server->close();server->deleteLater();delete ui;
}void MainWin_1::my_connect()
{QHostAddress IP("172.28.197.253");  //ip is your IPquint16 port = 8889;if(server->listen(IP, port)){}else{QMessageBox::warning(this, "warning", tr("listen failed!"), QMessageBox::No);}
}void MainWin_1::on_pushButton_clicked()
{QString sendmessage;//QString recive_message;//send_message = ui->lineEdit->text();//QTextCodec* codec=QTextCodec::codecForName("UTF-8");QTextCodec* codec=QTextCodec::codecForName("GBK");QString timelist = QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss");sendmessage = ui->textEdit_2->toPlainText();QByteArray sendmessage_ = codec->fromUnicode(sendmessage);qint16 writeResult = socket->write(sendmessage_); //send newsbool BoolFlush = socket->flush();if(writeResult != -1 && BoolFlush == 1){if(writeResult == 0){QMessageBox::warning(this, "warning", tr("read date result is 0!"), QMessageBox::Yes, QMessageBox::No);}}timelist = "server: " + timelist;//QString sendmessage_ = ui->textEdit_2->toPlainText().toLatin1();//sendmessage = codec->toUnicode(sendmessage_.toLatin1().data());//QString sendmessage_ = codec->toUnicode(sendmessage);ui->textEdit->append(timelist);ui->textEdit->append(ui->textEdit_2->toPlainText());ui->textEdit_2->clear();
}void MainWin_1::server_NEW_Connect()
{socket = server->nextPendingConnection();QObject::connect(socket, SIGNAL(readyRead()), this, SLOT(socket_Read_Data()));QObject::connect(socket, SIGNAL(disconnected()), this, SLOT(socket_Disconnect()));
}void MainWin_1::socket_Read_Data()
{QByteArray buffer;buffer = socket->readAll(); //read news of client//QTextCodec* codec=QTextCodec::codecForName("GBK");QString timelist = QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"); //view of timetimelist = "client: " + timelist;//QString buffer_ = QString(buffer);//QString buffer_ = codec->toUnicode(buffer);ui->textEdit->append(timelist);ui->textEdit->append(buffer);//ui->textEdit->append(buffer_);
}void MainWin_1::socket_Disconnect()
{}//mainwindows.cpp-----------------------------------------------------------------------
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "qmessagebox.h"MainWindow::MainWindow(QWidget *parent) :QMainWindow(parent),ui(new Ui::MainWindow)
{ui->setupUi(this);setWindowTitle(tr("QQ"));//title of login
}MainWindow::~MainWindow()
{delete ui;
}void MainWindow::on_pushButton_clicked()
{QString name = ui->lineEdit->text();     //userQString passw = ui->lineEdit_2->text();  //passwordif((name == "caojian" && passw == "123") || (name == "laowang" && passw == "321")){mainwin = new MainWin_1;mainwin->show();MainWindow::close();  //close the login}else{QMessageBox::warning(this, "login failed", "user or password is error!");return;}
}void MainWindow::on_pushButton_2_clicked()
{QApplication::exit();//logout
}

client端的代码如下：

mainwin_1.h + mainwindows.h:

//mainwin.h
#ifndef MAINW_1_H
#define MAINW_1_H#include <QMainWindow>
#include <QTcpServer>
#include <QTcpSocket>namespace Ui {
class MainW_1;
}class MainW_1 : public QMainWindow
{Q_OBJECTpublic:explicit MainW_1(QWidget *parent = 0);~MainW_1();private slots:void on_pushButton_clicked();void socket_Read_Date();void socket_Disconnected();private:void my_connect();private:Ui::MainW_1 *ui;QTcpSocket *socket;
};#endif // MAINW_1_Hmainwindows.h---------------------------------------------------------
#ifndef MAINWINDOW_H
#define MAINWINDOW_H#include <QMainWindow>
#include <mainw_1.h>namespace Ui {
class MainWindow;
}class MainWindow : public QMainWindow
{Q_OBJECTpublic:explicit MainWindow(QWidget *parent = 0);MainW_1 *mainwin;~MainWindow();private slots:void on_pushButton_clicked();void on_pushButton_2_clicked();private:Ui::MainWindow *ui;
};#endif // MAINWINDOW_H

main.cpp + mainwin_1.cpp + mianwindows.cpp:

//main.cpp
#include "mainwindow.h"
#include <QApplication>
#include "QTextCodec"int main(int argc, char *argv[])
{QApplication a(argc, argv);MainWindow w;QTextCodec::setCodecForTr( QTextCodec::codecForName("GBK"));QTextCodec::setCodecForCStrings( QTextCodec::codecForName("GBK"));w.show();return a.exec();
}//mainwin_1.cpp-----------------------------------------------------
#include "mainw_1.h"
#include "ui_mainw_1.h"
#include "QMessageBox"
#include "QDebug"
#include "QString"
#include "QDateTime"
#include "QTextCodec"MainW_1::MainW_1(QWidget *parent) :QMainWindow(parent),ui(new Ui::MainW_1)
{ui->setupUi(this);setWindowTitle(tr("Q_Q"));socket = new QTcpSocket();connect(socket, SIGNAL(readyRead()), this, SLOT(socket_Read_Date()));my_connect();
}MainW_1::~MainW_1()
{delete this->socket;delete ui;
}void MainW_1::my_connect()
{socket->abort();socket->connectToHost("172.28.197.253", 8889);  //ip is your IPif(!socket->waitForConnected(50000)){qDebug()<<tr("listen server failed!");QMessageBox::warning(this, "warning", tr("listen server failed!"), QMessageBox::Yes, QMessageBox::No);}else{qDebug()<<tr("listen server succeed!");}
}void MainW_1::on_pushButton_clicked()
{QString sendmessage;QTextCodec* codec=QTextCodec::codecForName("GBK");sendmessage = ui->textEdit_2->toPlainText();QByteArray sendmessage_ = codec->fromUnicode(sendmessage);QMessageBox::warning(this, "warning", tr("11111111111"), QMessageBox::Yes, QMessageBox::No);qint16 writeResult = socket->write(sendmessage_); //send newsbool BoolFlush = socket->flush();if(writeResult != -1 && BoolFlush == 1){if(writeResult == 0){QMessageBox::warning(this, "warning", tr("read result is 0!"), QMessageBox::Yes, QMessageBox::No);}}QString timelist = QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss");timelist = "client: " + timelist;//sendmessage = ui->textEdit_2->toPlainText().toLatin1();ui->textEdit->append(timelist);ui->textEdit->append(ui->textEdit_2->toPlainText());ui->textEdit_2->clear();
}void MainW_1::socket_Read_Date()
{QByteArray buffer;buffer = socket->readAll();  //accept news//QString buffer_ = QString(buffer);QString timelist = QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"); //view timetimelist = "server: " + timelist;ui->textEdit->append(timelist);ui->textEdit->append(buffer);
}void MainW_1::socket_Disconnected()
{}//mainwindows.cpp-----------------------------------------------------------
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "qmessagebox.h"MainWindow::MainWindow(QWidget *parent) :QMainWindow(parent),ui(new Ui::MainWindow)
{ui->setupUi(this);setWindowTitle(tr("Q_Q"));
}MainWindow::~MainWindow()
{delete ui;
}void MainWindow::on_pushButton_clicked()
{QString name = ui->lineEdit->text();QString password = ui->lineEdit_2->text();if((name == "caojian" && password == "123") || (name == "laowang" && password == "321")){mainwin = new MainW_1;mainwin->show();MainWindow::close();}else{QMessageBox::warning(this, "login failed", "name or password is error!");return;}
}void MainWindow::on_pushButton_2_clicked()
{QApplication::exit();
}

以上是全部代码！加油。

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