qt实现空闲教室预约系统

要实现空闲教室预约系统，可以按照以下步骤进行：

1. 设计数据库模型，包括教室信息、预约信息等表格。

2. 创建一个Qt项目并连接数据库。

3. 创建登录界面，输入用户名和密码并进行身份验证，验证通过后进入主界面。

4. 创建教室信息展示页面，展示教室信息，包括教室编号、容量、设备等信息。

5. 创建预约页面，包括预约教室、预约日期、预约时间等信息，并将预约信息写入数据库。

6. 创建查询页面，包括查询条件、查询结果等信息，并从数据库中查询预约信息。

7. 创建管理页面，包括对预约信息的修改、删除等操作，同时需要对预约时间进行冲突检测。

8. 实现邮件或短信提醒功能，通知用户预约情况和预约结果。

9. 根据实际需要进行其他功能的设计和实现，比如导出预约信息报表等。

以上是一个简单的实现空闲教室预约系统的步骤，具体实现方式需要根据实际需求进行调整。

下面是一个简单的代码示例：

登录界面：

void LoginWidget::on_loginButton_clicked()
{
    QString username = ui->usernameLineEdit->text();
    QString password = ui->passwordLineEdit->text();

    if(username.isEmpty() || password.isEmpty()) {
        QMessageBox::warning(this, tr("Warning"), tr("Username or password is empty!"));
        return;
    }

    if(dbManager->userAuth(username, password) == true) {
        this->accept();
    } else {
        QMessageBox::warning(this, tr("Warning"), tr("Username or password is incorrect!"));
        return;
    }
}

教室信息展示页面：

void MainWindow::on_classroomListWidget_itemDoubleClicked(QListWidgetItem *item)
{
    QString classroomName = item->text();
    Classroom classroom = dbManager->getClassroom(classroomName);

    QMessageBox::information(this, tr("Classroom Info"), 
        tr("Classroom Name: %1\nClassroom Capacity: %2\nClassroom Devices: %3")
        .arg(classroom.getName()).arg(classroom.getCapacity()).arg(classroom.getDevices()));
}

预约页面：

void ReservationWidget::on_reserveButton_clicked()
{
    QString classroomName = ui->classroomComboBox->currentText();
    QString date = ui->dateEdit->date().toString("yyyy-MM-dd");
    QString startTime = ui->startTimeComboBox->currentText();
    QString endTime = ui->endTimeComboBox->currentText();

    if(classroomName.isEmpty() || date.isEmpty() || startTime.isEmpty() || endTime.isEmpty()) {
        QMessageBox::warning(this, tr("Warning"), tr("Please fill in all the information!"));
        return;
    }

    if(dbManager->checkConflict(classroomName, date, startTime, endTime) == true) {
        QMessageBox::warning(this, tr("Warning"), tr("The classroom has been reserved during the selected period!"));
        return;
    }

    Reservation reservation(classroomName, date, startTime, endTime);
    dbManager->addReservation(reservation);

    QMessageBox::information(this, tr("Success"), tr("Reservation is successful!"));
    this->close();
}

查询页面：

void QueryWidget::on_searchButton_clicked()
{
    QString classroomName = ui->classroomComboBox->currentText();
    QString date = ui->dateEdit->date().toString("yyyy-MM-dd");

    if(classroomName.isEmpty() && date.isEmpty()) {
        QMessageBox::warning(this, tr("Warning"), tr("Please select at least one search condition!"));
        return;
    }

    QList<Reservation> reservations = dbManager->getReservations(classroomName, date);

    ui->reservationTableWidget->setRowCount(0);

    for(int i = 0; i < reservations.size(); i++) {
        ui->reservationTableWidget->insertRow(i);

        Reservation reservation = reservations.at(i);

        QTableWidgetItem *classroomItem = new QTableWidgetItem(reservation.getClassroomName());
        QTableWidgetItem *dateItem = new QTableWidgetItem(reservation.getDate());
        QTableWidgetItem *startTimeItem = new QTableWidgetItem(reservation.getStartTime());
        QTableWidgetItem *endTimeItem = new QTableWidgetItem(reservation.getEndTime());

        ui->reservationTableWidget->setItem(i, 0, classroomItem);
        ui->reservationTableWidget->setItem(i, 1, dateItem);
        ui->reservationTableWidget->setItem(i, 2, startTimeItem);
        ui->reservationTableWidget->setItem(i, 3, endTimeItem);
    }
}

管理页面：

void ManageWidget::on_deleteButton_clicked()
{
    int row = ui->reservationTableWidget->currentRow();

    if(row < 0) {
        QMessageBox::warning(this, tr("Warning"), tr("Please select a reservation to delete!"));
        return;
    }

    QString classroomName = ui->reservationTableWidget->item(row, 0)->text();
    QString date = ui->reservationTableWidget->item(row, 1)->text();
    QString startTime = ui->reservationTableWidget->item(row, 2)->text();
    QString endTime = ui->reservationTableWidget->item(row, 3)->text();

    dbManager->deleteReservation(classroomName, date, startTime, endTime);

    ui->reservationTableWidget->removeRow(row);
}

以上是一个简单的空闲教室预约系统的代码示例，具体实现方式需要根据实际需求进行调整。