毕业设计：基于C++和QT的文件传输系统（含客户端和服务端）.zip

#include "client.h" #include "ui_client.h" #include <QGridLayout> #include <QCloseEvent> #include <QMessageBox> #include <QDebug> #include <QtNetwork> #include <QFileDialog> #include <QFile> Client::Client(QWidget *parent) : QWidget(parent), ui(new Ui::Client) { ui->setupUi(this); //添加样式 qssFile = new QFile(":/qss/myStyleSheetB.qss",this); qssFile->open(QFile::ReadOnly); QString styleSheet = tr(qssFile->readAll()); qApp->setStyleSheet(styleSheet); qssFile->close(); //栅格化初始布局 setMyLayout(); //进入登录注册界面 loginView(); tcpClient = new QTcpSocket(this); tcpClient->connectToHost(QHostAddress::LocalHost,6666); //先不进行文件传输 isUploadingFile = false; //接收文件初始化 isDownloadingFile = false; downTotalBytes = 0; downBytesReceived = 0; downFileNameSize = 0; //当有可读数据时，发射readyread信号 connect(tcpClient, &QTcpSocket::readyRead, this, &Client::readMessage); //连接错误 connect(tcpClient, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(disPlayError(QAbstractSocket::SocketError)));//发生错误时error信号 //发射开始上传信息好后开始上传 connect(this, SIGNAL(startUploadSignal()), this, SLOT(startUpload())); //上传过程中更新上传进度 connect(tcpClient, SIGNAL(bytesWritten(qint64)), this, SLOT(updateUploadProgress(qint64))); qDebug() <<"ok"; } Client::~Client() { delete tcpClient; delete ui; } /*-------------------------页面布局模块--------------------------*/ /*栅格化初始布局*/ void Client::setMyLayout() { QGridLayout *layout = new QGridLayout; layout->addWidget(ui->idLabel,1,0,1,2); layout->addWidget(ui->idLineEdit,1,2,1,4); layout->addWidget(ui->passLabel,2,0,1,2); layout->addWidget(ui->passLineEdit,2,2,1,4); layout->addWidget(ui->regiButton,3,0,1,3); layout->addWidget(ui->loginButton,3,3,1,3); layout->addWidget(ui->stateLabel,4,0,1,2); layout->addWidget(ui->contentLabel,4,2,1,4); layout->addWidget(ui->loginStatusLabel,5,0,1,4); layout->addWidget(ui->exitButton,5,4,1,2); layout->addWidget(ui->actLine,6,0,1,6); layout->addWidget(ui->upWarnLabel,7,2,1,2); layout->addWidget(ui->openButton,8,0,1,3); layout->addWidget(ui->upButton,8,3,1,3); layout->addWidget(ui->filenameLabel,9,0,1,6); layout->addWidget(ui->upBar,10,0,1,6); layout->addWidget(ui->sepLine,11,0,1,6); layout->addWidget(ui->downWarnLabel,12,2,1,2); layout->addWidget(ui->searchEdit,13,0,1,4); layout->addWidget(ui->searchButton,13,4,1,2); layout->addWidget(ui->downLabel,14,0,1,6); layout->addWidget(ui->downButton,15,0,1,3); layout->addWidget(ui->unDownButton,15,3,1,3); layout->addWidget(ui->downBar,16,0,1,6); layout->setHorizontalSpacing(20); //控件间横向距离 layout->setVerticalSpacing(30); //控件间纵向距离 layout->setMargin(30); //设置内边距 setLayout(layout); } /*登录界面*/ void Client::loginView() { //要隐藏的控件 ui->loginStatusLabel->hide(); ui->exitButton->hide(); ui->actLine->hide(); ui->openButton->hide(); ui->upButton->hide(); ui->filenameLabel->hide(); ui->upBar->hide(); ui->sepLine->hide(); ui->searchEdit->hide(); ui->searchButton->hide(); ui->downLabel->hide(); ui->downButton->hide(); ui->downBar->hide(); ui->upWarnLabel->hide(); ui->downWarnLabel->hide(); ui->unDownButton->hide(); //要显示的控件 ui->idLabel->show(); ui->idLineEdit->show(); ui->passLabel->show(); ui->passLineEdit->show(); ui->loginButton->show(); ui->regiButton->show(); ui->stateLabel->show(); ui->contentLabel->show(); //设置大小 this->resize(350,230); } /*客户端操作界面*/ void Client::actView() { //要隐藏的控件 ui->idLabel->hide(); ui->idLineEdit->hide(); ui->passLabel->hide(); ui->passLineEdit->hide(); ui->loginButton->hide(); ui->regiButton->hide(); ui->stateLabel->hide(); ui->contentLabel->hide(); //要显示的控件 ui->loginStatusLabel->show(); ui->actLine->show(); ui->openButton->show(); ui->upButton->show(); ui->filenameLabel->show(); ui->upBar->show(); ui->sepLine->show(); ui->searchEdit->show(); ui->searchButton->show(); ui->downLabel->show(); ui->downButton->show(); ui->downBar->show(); ui->exitButton->show(); ui->upWarnLabel->show(); ui->downWarnLabel->show(); ui->unDownButton->show(); //控件初始化 ui->downBar->reset(); ui->upBar->reset(); ui->filenameLabel->setText(tr("当前未选择文件")); ui->downLabel->setText(tr("当前未搜索文件")); ui->searchEdit->setText(tr("")); //上传下载按钮设置无效 ui->upButton->setEnabled(false); ui->downButton->setEnabled(false); ui->unDownButton->setEnabled(false); //设置大小 this->resize(350,420); } /*-------------------------页面布局模块结束--------------------------*/ /*-------------------------操作模块--------------------------------*/ /*发送消息的函数 * Mess -- 消息指令 * str1 -- 第一内容字符串 * str2 -- 第二内容字符串 * */ void Client::sendMessToServer(QString Mess, QString str1, QString str2){ QByteArray requestBlock; //用来存放请求信息 QDataStream out(&requestBlock, QIODevice::WriteOnly); //设置数据流的版本，客户端和服务器使用的版本要相同 out.setVersion(QDataStream::Qt_5_6);//版本 out << (quint64)0;//因为在写入数据以前可能不知道实际数据的大小，所以要先在数据块的最前面留四个字节位置，以便以后填写数据大小 out << Mess << str1 << str2; //输入实际数据 out.device()->seek(0);//跳转到数据块头部 out << (quint64)(requestBlock.size() - sizeof(quint64));//填写信息大小 tcpClient->write(requestBlock); //发送 qDebug() <<"send" << Mess << str1 << str2; requestBlock.resize(0); } /*点击x按钮*/ void Client::closeEvent(QCloseEvent *event) { QMessageBox::StandardButton button; if(isUploadingFile){ //如果正在传输文件，提示有文件正在上传 button = QMessageBox::warning(this, tr("警告"), QString(tr("有文件正在上传，无法退出程序")), QMessageBox::Cancel); event->ignore(); //忽略退出信号，程序继续运行 } else if(isDownloadingFile){ //如果正在下载文件，提示有文件正在下载 button = QMessageBox::warning(this, tr("警告"), QString(tr("有文件正在下载，无法退出程序")), QMessageBox::Cancel); event->ignore(); //忽略退出信号，程序继续运行 } else{ button = QMessageBox::question(this, tr("退出程序"), QString(tr("确认退出程序?")), QMessageBox::Yes | QMessageBox::No); if (button == QMessageBox::No) { event->ignore(); //忽略退出信号，程序继续运行 } else if (button == QMessageBox::Yes) { sendMessToServer(EXITAPP, MESSNULL, MESSNULL); //向服务器发送退出客户端信息 tcpClient->close(); event->accept(); //接受退出信号，程序退出 qDebug() <<"exit"; } } } /*点击登录按钮，向服务器发送请求*/ void Client::on_loginButton_clicked() { QString id = ui->idLineEdit->text(); //获取账户 QString pass = ui->passLineEdit->t