基于qt软件的网上聊天室软件

1.服务器:

        1).功能:

用于创建一个客户端，通过文本编辑器来获得端口号，根据获得的端口号创建服务器，等待客户端连接

创建成功会提示服务器创建成功

在收到客户端发送的信息时，把这条信息发送给其他所有客户端，实现群聊功能

        2).代码:

-------------------------------------------------------------------
.pro
-------------------------------------------------------------------
QT       += core gui networkgreaterThan(QT_MAJOR_VERSION, 4): QT += widgetsCONFIG += c++11# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0SOURCES += \main.cpp \widget.cppHEADERS += \widget.hFORMS += \widget.ui# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target
-------------------------------------------------------------------
widget.h
-------------------------------------------------------------------
#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>
#include <QMessageBox>
#include <QTcpServer>
#include <QTcpSocket>
#include <QPushButton>
#include <QLabel>
#include <QListWidget>
#include <QLineEdit>
#include <QList>QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACEclass Widget : public QWidget
{Q_OBJECTpublic:Widget(QWidget *parent = nullptr);~Widget();public slots:void connectbtn_slot();void connected_slot();void readyread_slot();private:Ui::Widget *ui;//定义服务器QTcpServer *server;//定义一个链表存放连接的客户端数据QList<QTcpSocket *> client;};
#endif // WIDGET_H
-------------------------------------------------------------------
main.cpp
-------------------------------------------------------------------
#include "widget.h"#include <QApplication>int main(int argc, char *argv[])
{QApplication a(argc, argv);Widget w;w.show();return a.exec();
}
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widget.cpp
-------------------------------------------------------------------
#include "widget.h"
#include "ui_widget.h"Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);//实例化服务器server = new QTcpServer(this);//连接按钮与对应槽函数connect(ui->connectbtn,&QPushButton::clicked,this,&Widget::connectbtn_slot);}Widget::~Widget()
{delete ui;
}//按下按钮后启动服务器
void Widget::connectbtn_slot()
{//读取端口号quint16 port = ui->portedit->text().toInt();//设置为监听状态if(!server->listen(QHostAddress::Any,port)){QMessageBox::critical(this,"失败","服务器启动失败");return ;}QMessageBox::information(this,"成功","服务器启动成功");//连接客户端信号与槽函数connect(server,&QTcpServer::newConnection,this,&Widget::connected_slot);
}//客户端连接槽函数
void Widget::connected_slot()
{//获取客户端套接字QTcpSocket *cli = server->nextPendingConnection();//将得到的套接字写入链表client.push_back(cli);//把新套接字与接收信号连接connect(cli,&QTcpSocket::readyRead,this,&Widget::readyread_slot);}//有信息写入准备读取
void Widget::readyread_slot()
{//删除已经断开的客户端for(int i = 0;i < client.size();i++){if(client.at(i)->state() == 0){client.removeAt(i);}}//遍历发送数据的客户端for(int i = 0;i < client.size();i++){if(client.at(i)->bytesAvailable() != 0){//读取客户端数据QByteArray msg = client.at(i)->readAll();//将数据写到ui界面中ui->listWidget->addItem(QString::fromLocal8Bit(msg));//将数据发送给所有客户端for(int j = 0;j < client.size();j++){client.at(j)->write(msg);}}}}

2.客户端:

登陆界面 :

        1).功能:

输入账号密码，如果点击注册按钮，会将输入的账号密码存入数据库中

且对输入的账号密码进行判断(没输入账号会提示请输入账号，没输入密码会提示请输入密码)，输入的账号不能重复，但是密码可以重复；

如果点击登录按钮，会读取数据库中注册的账号密码，与输入的账号密码进行对比，

如果一致则提示登录成功并跳转到聊天室界面，如果在数据库中找不到账号则提示账号不存在，如果存在账号但是密码不正确，则输出密码错误

        2).代码:

-------------------------------------------------------------------
.pro
-------------------------------------------------------------------
QT       += core gui network sqlgreaterThan(QT_MAJOR_VERSION, 4): QT += widgetsCONFIG += c++11# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0SOURCES += \chat.cpp \main.cpp \widget.cppHEADERS += \chat.h \widget.h# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += targetRESOURCES += \Icon.qrcFORMS += \chat.ui
-------------------------------------------------------------------
widget.h
-------------------------------------------------------------------
#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>#include <QIcon>
#include <QLabel>
#include <QPushButton>
#include <QLineEdit>#include <QMessageBox>
#include <QDebug>#include <QSqlDatabase>
#include <QSqlQuery>class Widget : public QWidget
{Q_OBJECTpublic:Widget(QWidget *parent = nullptr);~Widget();signals:void loginsuccess_signal(QString account);public slots:void loginbtn_slot();void signinbtn_slot();private://组件QPushButton *login_btn;QPushButton *signin_btn;QLineEdit *account_edit;QLineEdit *pwd_edit;QLabel *main_lab;QLabel *account_lab;QLabel *pwd_lab;//数据库初始化QSqlDatabase db;};
#endif // WIDGET_H
-------------------------------------------------------------------
main.cpp
-------------------------------------------------------------------
#include "widget.h"
#include "chat.h"#include <QApplication>int main(int argc, char *argv[])
{QApplication a(argc, argv);Widget w;chat c;w.show();QObject::connect(&w,&Widget::loginsuccess_signal,&c,&chat::openchatroom_slot);return a.exec();
}
-------------------------------------------------------------------
widget.cpp
-------------------------------------------------------------------
#include "widget.h"Widget::Widget(QWidget *parent): QWidget(parent)
{//---------------------------------窗口设置---------------------------------//设置窗口为固定大小this->setFixedSize(540,410);//设置窗口iconthis->setWindowIcon(QIcon(":/icon/wodepeizhenshi.png"));//设置窗口名this->setWindowTitle("鹏哥快聊");//---------------------------------标签设置---------------------------------//=====创建界面标签=====main_lab = new QLabel(this);//修改标签大小main_lab->resize(540,200);//在标签中插入图片main_lab->setPixmap(QPixmap(":/icon/logo.png"));//设置为自适应main_lab->setScaledContents(1);//=====创建账号标签=====account_lab = new QLabel(this);//修改标签大小account_lab->resize(50,40);//在标签中插入图片account_lab->setPixmap(QPixmap(":/icon/userName.jpg"));//移动到合适位置account_lab->move(90,220);//设置为自适应account_lab->setScaledContents(1);//=====创建密码标签=====pwd_lab = new QLabel(this);//修改标签大小pwd_lab->resize(account_lab->size());//在标签中插入图片pwd_lab->setPixmap(QPixmap(":/icon/passwd.jpg"));//移动到合适位置pwd_lab->move(account_lab->x(),account_lab->y()+80);//设置为自适应pwd_lab->setScaledContents(1);//---------------------------------按钮设置---------------------------------//=====创建登录按钮=====login_btn = new QPushButton(this);//设置按钮大小login_btn->resize(100,40);//在按钮上插入图片login_btn->setIcon(QIcon(":/icon/login.png"));//在按钮上输入文本login_btn->setText("登录");//移动到合适位置login_btn->move(270,360);connect(login_btn,&QPushButton::clicked,this,&Widget::loginbtn_slot);//=====创建注册按钮=====signin_btn = new QPushButton(this);//设置按钮大小signin_btn->resize(100,40);//在按钮上插入图片signin_btn->setIcon(QIcon(":/icon/cancel.png"));//在按钮上输入文本signin_btn->setText("注册");//移动到合适位置signin_btn->move(login_btn->x()+120,login_btn->y());connect(signin_btn,&QPushButton::clicked,this,&Widget::signinbtn_slot);//---------------------------------输入设置---------------------------------//=====创建账号输入=====account_edit = new QLineEdit(this);//设置占位文本account_edit->setPlaceholderText("QQ号码/手机/邮箱");//设置大小account_edit->resize(200,40);//移动到适合位置account_edit->move(account_lab->x()+100,account_lab->y());//=====创建密码输入=====pwd_edit = new QLineEdit(this);//设置占位文本pwd_edit->setPlaceholderText("密码");//设置大小pwd_edit->resize(account_edit->size());//移动到合适位置pwd_edit->move(pwd_lab->x()+100,pwd_lab->y());//设置回文显示模式pwd_edit->setEchoMode(QLineEdit::Password);//--------------------------------数据库设置--------------------------------//判断数据库是否存在if(!db.contains("user.db")){//不存在//创建一个数据库db = QSqlDatabase::addDatabase("QSQLITE");//命名为user.dbdb.setDatabaseName("user.db");}//存在//打开数据库if(!db.open()){//打开失败QMessageBox::critical(this,"error","数据库打开失败");return;}//打开成功//创建一个表//准备sql语句QString sql = "create table if not exists usertab(""account char primary key,""passwd char)";//创建一个数据库指令执行者QSqlQuery commend;//执行sql语句if(!commend.exec(sql)){//创建表失败QMessageBox::critical(this,"error","表格创建失败");return;}}Widget::~Widget()
{
}//登录按钮槽函数
void Widget::loginbtn_slot()
{//获取账号和密码QString account =  account_edit->text();QString passwd = pwd_edit->text();//从数据库中读取账号和密码QString sql = "select * from usertab";//创建执行者并执行sql语句QSqlQuery commend;if(!commend.exec(sql)){//查找失败QMessageBox::critical(this,"error","获取注册表失败");return;}//查找成功,循环比较数据库信息与输入的信息while (commend.next()){if(commend.value(0).toString() == account){//账号正确if(commend.value(1).toString() == passwd){QMessageBox::information(this,"success","登录成功");emit loginsuccess_signal(account);this->close();return;}//密码错误QMessageBox::critical(this,"failed","登录失败,密码错误");pwd_edit->clear();return;}}//账号错误QMessageBox::critical(this,"failed","登录失败,账号不存在");pwd_edit->clear();
}//注册按钮槽函数
void Widget::signinbtn_slot()
{//判断是否填写完整信息if(account_edit->text() == ""){QMessageBox::critical(this,"error","请输入账号");return;}if(pwd_edit->text() == ""){QMessageBox::critical(this,"error","请输入密码");return;}//获取界面上的账号和密码QString account = account_edit->text();QString passwd = pwd_edit->text();//将注册的账号密码写入数据库中//准备sql语句QString sql = QString("insert into usertab values(\"%1\",\"%2\")").arg(account).arg(passwd);//创建执行者并执行sql语句QSqlQuery commend;if(!commend.exec(sql)){//注册失败,账号重复QMessageBox::critical(this,"error","重复注册");return;}//注册成功QMessageBox::information(this,"success","注册成功");
}

聊天室界面:

        1).功能:

进入时，显示登录时的账号，且发送按钮、断开按钮和发送的文本编辑器不可用

通过主机的IP和端口号进行连接至主机后，给服务器发送xxx : 进入聊天室，发送按钮、断开按钮和发送的文本编辑器重新可用，使IP和端口号的文本编辑器以及连接聊天室按钮不可用

在发送的文本编辑器中写入信息并按下发送按钮后，会整合发送信息然后发送信息给服务器，发送后清空文本内容，

点击断开聊天室按钮，重新使发送按钮、断开按钮和发送的文本编辑器不可用，使IP和端口号的文本编辑器以及连接聊天室按钮可用

并会给服务器发送一条xxx : 离开聊天室的信息

        2).代码:

-------------------------------------------------------------------
chat.h
-------------------------------------------------------------------
#ifndef CHAT_H
#define CHAT_H#include <QWidget>
#include <QTcpSocket>
#include <QPushButton>
#include <QLabel>
#include <QLineEdit>
#include <QListWidget>
#include <QMessageBox>namespace Ui {
class chat;
}class chat : public QWidget
{Q_OBJECTpublic:explicit chat(QWidget *parent = nullptr);~chat();public slots:void openchatroom_slot(QString account);void connectbtn_slot();void connected_slot();void readyread_slot();void sndbtn_slot();void disconbtn_slot();void disconnect_slot();private:Ui::chat *ui;//定义一个客户端套接字QTcpSocket *client;//定义一个用户名QString username;};#endif // CHAT_H
-------------------------------------------------------------------
chat.cpp
-------------------------------------------------------------------
#include "chat.h"
#include "ui_chat.h"chat::chat(QWidget *parent) :QWidget(parent),ui(new Ui::chat)
{//将用户名居中显示//ui->usernamelab_2->setAlignment(Qt::AlignCenter);ui->setupUi(this);//为客户端套接字实例化空间client = new QTcpSocket(this);//连接按钮与对应槽函数连接connect(ui->connectbtn,&QPushButton::clicked,this,&chat::connectbtn_slot);//已连接信号与对应槽函数连接connect(client,&QTcpSocket::connected,this,&chat::connected_slot);//服务器发送信息信号与对应槽函数连接connect(client,&QTcpSocket::readyRead,this,&chat::readyread_slot);//发送按钮与对应槽函数连接connect(ui->sndbtn,&QPushButton::clicked,this,&chat::sndbtn_slot);//断开按钮与对应槽函数connect(ui->disconbtn,&QPushButton::clicked,this,&chat::disconbtn_slot);//断开连接信号与对应槽函数connect(client,&QTcpSocket::disconnected,this,&chat::disconnect_slot);//设置按钮与编辑框可用ui->disconbtn->setEnabled(0);ui->sndbtn->setEnabled(0);ui->msgedit->setEnabled(0);
}chat::~chat()
{delete ui;
}void chat::openchatroom_slot(QString account)
{username = account;qDebug() << account;qDebug() << username;ui->usernamelab_2->setText(username);this->show();
}//连接按钮槽函数
void chat::connectbtn_slot()
{//从ui界面读取IP与portQString IP = ui->IPedit->text();quint16 port = ui->portedit->text().toUInt();//连接服务器client->connectToHost(IP,port);
}//已连接槽函数
void chat::connected_slot()
{//连接完成提示信息QMessageBox::information(this,"成功","成功进入聊天室");//发送xx进入聊天室提示给服务器QString sndmsg = username + " : 进入聊天室";client->write(sndmsg.toLocal8Bit());//设置按钮与编辑框可用ui->IPedit->setEnabled(0);ui->portedit->setEnabled(0);ui->connectbtn->setEnabled(0);ui->sndbtn->setEnabled(1);ui->msgedit->setEnabled(1);ui->disconbtn->setEnabled(1);}//读取服务器发送信息
void chat::readyread_slot()
{//读取信息QByteArray msg = client->readAll();//将读取的信息发送到信息框内ui->listWidget->addItem(QString::fromLocal8Bit(msg));
}//发送按钮对应槽函数
void chat::sndbtn_slot()
{//读取ui界面发送框内信息QString msg = ui->msgedit->text();msg = username + " : " + msg;//将数据发送给服务器client->write(msg.toLocal8Bit());ui->msgedit->clear();
}//断开连接按钮对应槽函数
void chat::disconbtn_slot()
{//准备发送离开信息QString msg = username + " : 离开聊天室";client->write(msg.toLocal8Bit());//断开连接client->disconnectFromHost();
}//断开连接信号槽函数
void chat::disconnect_slot()
{QMessageBox::information(this,"断开连接","成功退出聊天室");//设置按钮与编辑框可用ui->IPedit->setEnabled(1);ui->portedit->setEnabled(1);ui->connectbtn->setEnabled(1);ui->disconbtn->setEnabled(0);ui->sndbtn->setEnabled(0);ui->msgedit->setEnabled(0);
}