能实现MD5验证完整性，RSA加密消息，数据库进行登录验证的局域网聊天软件

#include "widget.h" #include "ui_widget.h" #include <QUdpSocket> #include <QHostInfo> #include <QMessageBox> #include <QScrollBar> #include <QDateTime> #include <QNetworkInterface> #include <QProcess> #pragma execution_character_set("utf-8")//设置中文= = #include "server.h" #include "client.h" #include <QFileDialog> #include"qtrsa.h" #include <QColorDialog> Widget::Widget(QWidget *parent,QString usrname) : QWidget(parent), ui(new Ui::Widget) { ui->setupUi(this); uName = usrname; udpSocket = new QUdpSocket(this); port = 23232; udpSocket->bind(port, QUdpSocket::ShareAddress | QUdpSocket::ReuseAddressHint); connect(udpSocket, SIGNAL(readyRead()), this, SLOT(processPendingDatagrams())); sndMsg(UsrEnter); srv = new Server(this); connect(srv, SIGNAL(sndFileName(QString)), this, SLOT(getFileName(QString))); setFixedSize(806,515); connect(ui->msgTxtEdit, SIGNAL(currentCharFormatChanged(QTextCharFormat)),this, SLOT(curFmtChanged(const QTextCharFormat))); } Widget::~Widget() { delete ui; } void Widget::sndMsg(MsgType type, QString srvaddr)//发送信息 { QByteArray data; QDataStream out(&data, QIODevice::WriteOnly); QString address = getIP(); out << type << getUsr(); switch(type)//根据不同的状态执行 { case Msg : if (ui->msgTxtEdit->toPlainText() == "") { QMessageBox::warning(0,tr("警告"),tr("发送内容不能为空"),QMessageBox::Ok); return; } out << address << getMsg(); ui->msgBrowser->verticalScrollBar()->setValue(ui->msgBrowser->verticalScrollBar()->maximum()); break; case UsrEnter : out << address; break; case UsrLeft : break; case FileName : { int row = ui->usrTblWidget->currentRow(); QString clntaddr = ui->usrTblWidget->item(row, 1)->text(); out << address << clntaddr << fileName; break; } case Refuse : out << srvaddr; break; } udpSocket->writeDatagram(data,data.length(),QHostAddress::Broadcast, port); } void Widget::processPendingDatagrams() { while(udpSocket->hasPendingDatagrams()) { QByteArray datagram; datagram.resize(udpSocket->pendingDatagramSize()); udpSocket->readDatagram(datagram.data(), datagram.size()); QDataStream in(&datagram, QIODevice::ReadOnly); int msgType; in >> msgType; QString usrName,ipAddr,msg; QString time = QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"); switch(msgType) { case Msg: in >> usrName >> ipAddr >> msg; ui->msgBrowser->setTextColor(Qt::blue); ui->msgBrowser->setCurrentFont(QFont("Times New Roman",12)); ui->msgBrowser->append("[ " +usrName+" ] "+ time); ui->msgBrowser->append(msg); break; case UsrEnter: in >>usrName >>ipAddr; usrEnter(usrName,ipAddr); break; case UsrLeft: in >>usrName; usrLeft(usrName,time); break; case FileName: { in >> usrName >> ipAddr; QString clntAddr, fileName; in >> clntAddr >> fileName; hasPendingFile(usrName, ipAddr, clntAddr, fileName); break; } case Refuse: { in >> usrName; QString srvAddr; in >> srvAddr; QString ipAddr = getIP(); if(ipAddr == srvAddr) { srv->refused(); } break; } } } } void Widget::usrEnter(QString usrname, QString ipaddr) { bool isEmpty = ui->usrTblWidget->findItems(usrname, Qt::MatchExactly).isEmpty(); if (isEmpty) { QTableWidgetItem *usr = new QTableWidgetItem(usrname); QTableWidgetItem *ip = new QTableWidgetItem(ipaddr); ui->usrTblWidget->insertRow(0); ui->usrTblWidget->setItem(0,0,usr); ui->usrTblWidget->setItem(0,1,ip); ui->msgBrowser->setTextColor(Qt::gray); ui->msgBrowser->setCurrentFont(QFont("Times New Roman",10)); ui->msgBrowser->append(tr("%1 在线！").arg(usrname)); ui->usrNumLbl->setText(tr("在线人数：%1").arg(ui->usrTblWidget->rowCount())); sndMsg(UsrEnter); } } void Widget::usrLeft(QString usrname, QString time) { int rowNum = ui->usrTblWidget->findItems(usrname, Qt::MatchExactly).first()->row(); ui->usrTblWidget->removeRow(rowNum); ui->msgBrowser->setTextColor(Qt::gray); ui->msgBrowser->setCurrentFont(QFont("Times New Roman", 10)); ui->msgBrowser->append(tr("%1 于 %2 离开！").arg(usrname).arg(time)); ui->usrNumLbl->setText(tr("在线人数：%1").arg(ui->usrTblWidget->rowCount())); } QString Widget::getIP() { QList<QHostAddress> list = QNetworkInterface::allAddresses(); foreach (QHostAddress addr, list) { if(addr.protocol() == QAbstractSocket::IPv4Protocol) return addr.toString(); } return 0; } QString Widget::getUsr() { return uName; } QString Widget::getMsg() { QString msg = ui->msgTxtEdit->toHtml(); ui->msgTxtEdit->clear(); ui->msgTxtEdit->setFocus(); return msg; } void Widget::on_sendBtn_clicked() { sndMsg(Msg); } void Widget::getFileName(QString name) { fileName = name; sndMsg(FileName); } void Widget::on_sendTBtn_clicked() { if(ui->usrTblWidget->selectedItems().isEmpty()) { QMessageBox::warning(0, tr("选择用户"),tr("请先选择目标用户！"), QMessageBox::Ok); return; } srv->show(); srv->initSrv(); } void Widget::hasPendingFile(QString usrname, QString srvaddr,QString clntaddr, QString filename) { QString ipAddr = getIP(); if(ipAddr == clntaddr) { int btn = QMessageBox::information(this,tr("接受文件"),tr("来自%1(%2)的文件：%3,是否接收？").arg(usrname).arg(srvaddr).arg(filename),QMessageBox::Yes,QMessageBox::No); if (btn == QMessageBox::Yes) { QString name = QFileDialog::getSaveFileName(0,tr("保存文件"),filename); if(!name.isEmpty()) { Client *clnt = new Client(this); clnt->setFileName(name); clnt->setHostAddr(QHostAddress(srvaddr)); clnt->show(); } } else { sndMsg(Refuse, srvaddr); } } } void Widget::on_fontCbx_currentFontChanged(const QFont &f) { ui->msgTxtEdit->setCurrentFont(f); ui->msgTxtEdit->setFocus(); } void Widget::on_sizeCbx_currentIndexChanged(const QString &arg1) { ui->msgTxtEdit->setFontPointSize(arg1.toDouble()); ui->msgTxtEdit->setFocus(); } void Widget::on_boldTBtn_clicked(bool checked) { if(checked) ui->msgTxtEdit->setFontWeight(QFont::Bold); else ui->msgTxtEdit->setFontWeight(QFont::Normal); ui->msgTxtEdit->setFocus(); } void Widget::on_italicTBtn_clicked(bool checked) { ui->msgTxtEdit->setFontItalic(checked); ui->msgTxtEdit->setFocus(); } void Widget::on_underlineTBtn_clicked(bool checked) { ui->msgTxtEdit->setFontUnderline(checked); ui->msgTxtEdit->setFocus(); } void Widget::on_colorTBtn_clicked() { color = QColorDialog::getColor(color,this); if(color.isValid()){ ui->msgTxtEdit->setTextColor(color); ui->msgTxtEdit->setFocus(); } } void Widget::curFmtChanged(const QTextCharFormat &fmt) { ui->fontCbx->setCurrentFont(fmt.font()); if (fmt.fontPointSize() < 8) { ui->sizeCbx->setCurrentIndex(4); } else { ui->sizeCbx->setCurrentIndex(ui->sizeCbx->findText(Q