Qt & MySQL学生管理系统
Qt & MySQL学生管理系统
- Author：纯洁小天使
- Date：2020/07/05
文章目录
- Qt & MySQL学生管理系统
-
- 一、运用到的知识点
- 二、实现功能
- 三、效果图
-
- 1、设置服务器
- 2、进入管理系统
-
- a 、设置栏
- b、登录相关
- 3、相应身份具有的功能
-
- a、管理员
- b、学生
- c、教师
- 四、相应代码
-
- （一）UI
- （二）mainwindow.h
- (三)mainwindow.cpp
- （四）main.cpp
- 五、写在最后的话
大家好，我是纯洁小天使，是一名软件工程专业的大一萌新，在大一的上半个学期跟随着学校的学习进度，已经学习完了C++的基础语法，略微懂得了一些编程的小知识，便想着写一个小程序作为上半个学期的学期总结，于是便有了本文中的小程序。
本人还只是一名大一刚刚入门编程的萌新，代码逻辑，命名肯定有各种不规范之处，还望多多担待，期待您的私信与留言，欢迎您指出我的错误，谢谢。
一、运用到的知识点
- C++的基础语法
- MySQL基本语句
- Qt
- HTML
- Linux命令
二、实现功能
- 访问数据库，实现对相应内容进行增、删、改、查的功能；
- 设置数据库的IP、USERNAME、PASSWORD；
三、效果图
1、设置服务器
输入相应的IP地址，数据库账号，密码，连接MySQL。
- 输入了错误的IP || 账号||密码 将会报错：
- 输入了正确的IP&&账号&&密码 正常访问：
- 连接成功后点击OK，会跳转到管理系统界面
2、进入管理系统
在账号，密码栏中输入正确的账号&&密码&&选择正确的身份，点击登录可以进入相应的界面，点击退出会退出程序，设置栏中可以设置相应内容。
a 、设置栏
设置栏内有一下功能：
- 设置数据库（即返回设置数据库界面）
- 关于本程序（介绍程序相关内容）
- 关于作者（接受作者相关信息）
b、登录相关
输入正确的账号&&正确的密码&&选择正确的身份，可以进入相应身份具有的页面，否则会报错。
重新选择正确的账号&&密码&&身份可以进入界面
3、相应身份具有的功能
a、管理员
管理员可以对全部的人员的账号密码进行修改，如图：
b、学生
学生可以查看自己的相应成绩，如图：
c、教师
教师可以修改相应的成绩，如图：
四、相应代码
（一）UI
/********************************************************************************
** Form generated from reading UI file 'mainwindow.ui'
**
** Created by: Qt User Interface Compiler version 5.9.0
**
** WARNING! All changes made in this file will be lost when recompiling UI file!
********************************************************************************/
#ifndef UI_MAINWINDOW_H
#define UI_MAINWINDOW_H
#include \350\276\275\345\256\201\347\247\221\346\212\200\345\244\247\345\255\246\346\240\241\345\233\255\347\256\241\347\220\206\347\263\273\347\273\237
", Q_NULLPTR));
account_label->setText(QApplication::translate("MainWindow", "\350\264\246\345\217\267\357\274\232", Q_NULLPTR));
password_label->setText(QApplication::translate("MainWindow", "\345\257\206\347\240\201\357\274\232", Q_NULLPTR));
login_pushButton->setText(QApplication::translate("MainWindow", "\347\231\273\345\275\225", Q_NULLPTR));
exit_pushButton->setText(QApplication::translate("MainWindow", "\351\200\200\345\207\272", Q_NULLPTR));
notice_label->setText(QApplication::translate("MainWindow", "\346\263\250\346\204\217\350\257\267\350\276\223\345\205\245\350\264\246\345\217\267\345\222\214\345\257\206\347\240\201\345\220\216\351\200\211\346\213\251\350\272\253\344\273\275!
", Q_NULLPTR));
admin_checkBox->setText(QApplication::translate("MainWindow", "\347\256\241\347\220\206\345\221\230", Q_NULLPTR));
student_checkBox->setText(QApplication::translate("MainWindow", "\345\255\246\347\224\237", Q_NULLPTR));
teacher_checkBox->setText(QApplication::translate("MainWindow", "\346\225\231\345\270\210", Q_NULLPTR));
log_label->setText(QString());
title_label_2->setText(QApplication::translate("MainWindow", "\350\256\276\347\275\256\346\234\215\345\212\241\345\231\250
", Q_NULLPTR));
confirm_pushButton->setText(QApplication::translate("MainWindow", "\347\241\256\350\256\244", Q_NULLPTR));
return_pushButton->setText(QApplication::translate("MainWindow", "\350\277\224\345\233\236", Q_NULLPTR));
ip_label_2->setText(QApplication::translate("MainWindow", "\346\225\260\346\215\256\345\272\223IP\357\274\232", Q_NULLPTR));
ip_lineEdit->setText(QApplication::translate("MainWindow", "127.0.0.", Q_NULLPTR));
account_label_2->setText(QApplication::translate("MainWindow", "\346\225\260\346\215\256\345\272\223\350\264\246\345\217\267\357\274\232", Q_NULLPTR));
account_lineEdit_2->setText(QApplication::translate("MainWindow", "roo", Q_NULLPTR));
password_label_2->setText(QApplication::translate("MainWindow", "\346\225\260\346\215\256\345\272\223\345\257\206\347\240\201\357\274\232", Q_NULLPTR));
password_lineEdit_2->setText(QApplication::translate("MainWindow", "123123", Q_NULLPTR));
title_label_3->setText(QApplication::translate("MainWindow", "\347\256\241\347\220\206\345\221\230\347\225\214\351\235\242
", Q_NULLPTR));
cancel_pushButton_2->setText(QApplication::translate("MainWindow", "\346\222\244\351\224\200", Q_NULLPTR));
add_pushButton_2->setText(QApplication::translate("MainWindow", "\345\242\236\345\212\240", Q_NULLPTR));
save_pushButton_2->setText(QApplication::translate("MainWindow", "\344\277\235\345\255\230", Q_NULLPTR));
delete_pushButton_2->setText(QApplication::translate("MainWindow", "\345\210\240\351\231\244", Q_NULLPTR));
search_pushButton_2->setText(QApplication::translate("MainWindow", "\346\237\245\346\211\276", Q_NULLPTR));
tabWidget->setTabText(tabWidget->indexOf(tab), QApplication::translate("MainWindow", "\347\256\241\347\220\206\345\221\230\346\225\260\346\215\256\345\272\223", Q_NULLPTR));
add_pushButton_3->setText(QApplication::translate("MainWindow", "\345\242\236\345\212\240", Q_NULLPTR));
cancel_pushButton_3->setText(QApplication::translate("MainWindow", "\346\222\244\351\224\200", Q_NULLPTR));
delete_pushButton_3->setText(QApplication::translate("MainWindow", "\345\210\240\351\231\244", Q_NULLPTR));
save_pushButton_3->setText(QApplication::translate("MainWindow", "\344\277\235\345\255\230", Q_NULLPTR));
search_pushButton_3->setText(QApplication::translate("MainWindow", "\346\237\245\346\211\276", Q_NULLPTR));
tabWidget->setTabText(tabWidget->indexOf(tab_2), QApplication::translate("MainWindow", "\345\255\246\347\224\237\346\225\260\346\215\256\345\272\223", Q_NULLPTR));
add_pushButton->setText(QApplication::translate("MainWindow", "\345\242\236\345\212\240", Q_NULLPTR));
delete_pushButton->setText(QApplication::translate("MainWindow", "\345\210\240\351\231\244", Q_NULLPTR));
search_pushButton->setText(QApplication::translate("MainWindow", "\346\237\245\346\211\276", Q_NULLPTR));
save_pushButton->setText(QApplication::translate("MainWindow", "\344\277\235\345\255\230", Q_NULLPTR));
cancel_pushButton->setText(QApplication::translate("MainWindow", "\346\222\244\351\224\200", Q_NULLPTR));
tabWidget->setTabText(tabWidget->indexOf(tab_3), QApplication::translate("MainWindow", "\346\225\231\345\270\210\346\225\260\346\215\256\345\272\223", Q_NULLPTR));
label_2->setText(QApplication::translate("MainWindow", "\347\256\241\347\220\206\345\221\230\347\231\273\345\275\225", Q_NULLPTR));
welcome_label->setText(QApplication::translate("MainWindow", "\346\254\242\350\277\216\357\274\232", Q_NULLPTR));
show_admin_label->setText(QApplication::translate("MainWindow", "TextLabel", Q_NULLPTR));
label->setText(QApplication::translate("MainWindow", "\346\254\242\350\277\216\357\274\232", Q_NULLPTR));
show_student_label->setText(QApplication::translate("MainWindow", "TextLabel", Q_NULLPTR));
label_4->setText(QApplication::translate("MainWindow", "\345\220\214\345\255\246\347\231\273\345\275\225", Q_NULLPTR));
save_pushButton_4->setText(QApplication::translate("MainWindow", "\344\277\235\345\255\230", Q_NULLPTR));
delete_pushButton_4->setText(QApplication::translate("MainWindow", "\345\210\240\351\231\244", Q_NULLPTR));
search_pushButton_4->setText(QApplication::translate("MainWindow", "\346\237\245\346\211\276", Q_NULLPTR));
cancel_pushButton_4->setText(QApplication::translate("MainWindow", "\346\222\244\351\224\200", Q_NULLPTR));
add_pushButton_4->setText(QApplication::translate("MainWindow", "\345\242\236\345\212\240", Q_NULLPTR));
label_3->setText(QApplication::translate("MainWindow", "\346\254\242\350\277\216\357\274\232", Q_NULLPTR));
show_teacher_label->setText(QApplication::translate("MainWindow", "TextLabel", Q_NULLPTR));
label_6->setText(QApplication::translate("MainWindow", "\350\200\201\345\270\210\347\231\273\345\275\225", Q_NULLPTR));
menu->setTitle(QApplication::translate("MainWindow", "\350\256\276\347\275\256", Q_NULLPTR));
menu_2->setTitle(QApplication::translate("MainWindow", "\346\225\260\346\215\256\345\272\223", Q_NULLPTR));
} // retranslateUi
};
namespace Ui {
class MainWindow: public Ui_MainWindow {};
} // namespace Ui
QT_END_NAMESPACE
#endif // UI_MAINWINDOW_H
（二）mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include (三)mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent):QMainWindow(parent),ui(new Ui::MainWindow) //init
{
ui->setupUi(this);
this->ui->ipds_label->setText(this->db_ip);
connect(this->ui->aboutsoftware,&QAction::triggered,this,this->OpenAboutSoftWare); //关于软件
connect(this->ui->aboutdb,&QAction::triggered,this,this->OpenAboutDb); //关于数据库
connect(this->ui->aboutAuthor,&QAction::triggered,this,this->OpenAboutAuthor); //关于作者
connect(this->ui->setdb,&QAction::triggered,this,this->setDataBase); //设置数据库
this->db_ip = this->ui->ip_lineEdit->text();//从IP_LINEEDIT 中获取ip
this->db_Username = this->ui->account_lineEdit_2->text();//从LINEEDIT中获取USERNAME
this->db_Password = this->ui->password_lineEdit_2->text();//从LINEEDIT中获取PASSWORD
/*数据库相关*/
this->ui->ipds_label->setText(this->db_ip);
this->db.setHostName(this->db_ip);
this->db.setDatabaseName(this->db_Databasename);
this->db.setUserName(this->db_Username);
this->db.setPassword(this->db_Password);
//对数据库连接情况进行判断
if(!(this->db.open()))
{
QMessageBox::warning(nullptr,"错误!",db.lastError().text());
this->ui->stackedWidget->setCurrentIndex(1); //切换界面至设置数据库界面
}
else
{
QMessageBox::about(nullptr,"连接成功！","数据库已经成功连接！");//显示连接成功
}
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::OpenAboutSoftWare()//打开关于本程序
{
QMessageBox::about(nullptr,"关于本软件","本程序是一个对校园进行管理的简易系统本程序使用Qt框架结合C++语言进行设计，结合MySQL搭建数据库。本程序仅供实验使用。
");
}
void MainWindow::OpenAboutDb()//关于数据库
{
QMessageBox::about(nullptr,"关于数据库","本软件服务器搭建于Raspberry pi 3b+（Linux）系统，数据库使用MySQL
默认IP地址：127.0.0.1 （localhost）
默认用户名：root
默认密码：123123
");
}
void MainWindow::OpenAboutAuthor()//关于作者
{
QMessageBox::about(nullptr,"关于作者","辽宁科技大学 PureAngel");
}
void MainWindow::setDataBase() //切换界面
{
//SetDataBase*ptr_db = new SetDataBase(this->db);
//ptr_db->show();
this->ui->stackedWidget->setCurrentIndex(1);
}
void MainWindow::on_exit_pushButton_clicked() // 退出程序
{
this->close();
}
void MainWindow::on_login_pushButton_clicked()//登录
{
QSqlQuery query;
query.exec(this->cmd);//录入SQL
if(query.first()) //登录成功
{
QMessageBox::information(nullptr,"登录成功","欢迎登录！",QMessageBox::Yes);//显示成功
//switch (this->flag)
//{
//case 1:
// this->ui->stackedWidget->setCurrentIndex(2);
// break;
// case 2:
// this->ui->stackedWidget->setCurrentIndex(3);
// break;
// case 3:
// this->ui->stackedWidget->setCurrentIndex(4);
// break;
//default:
// break;
// }
if(this->flag == 1) //admin界面
{
this->ui->stackedWidget->setCurrentIndex(2);//切换至admin界面
/*管理员的数据库显示*/
this->admin_model = new QSqlTableModel(this);
this->admin_model->setTable("admin"); //选择数据库
this->ui->admin_tableView->setModel(this->admin_model); //显示出相应内容
this->admin_model->select();//全部显示
/*学生的数据库显示*/
this->student_model = new QSqlTableModel(this);
this->student_model->setTable("student");
this->ui->student_tableView->setModel(this->student_model);
this->student_model->select();
/*教师*/
this->teacher_model = new QSqlTableModel(this);
this->teacher_model->setTable("teacher");
this->ui->teacher_tableView->setModel(this->teacher_model);
this->teacher_model->select();
/*设置数据库显示相关*/
this->admin_model->setHeaderData(0,Qt::Horizontal,"账号");
this->admin_model->setHeaderData(1,Qt::Horizontal,"密码");
this->student_model->setHeaderData(0,Qt::Horizontal,"账号");
this->student_model->setHeaderData(1,Qt::Horizontal,"密码");
this->teacher_model->setHeaderData(0,Qt::Horizontal,"账号");
this->teacher_model->setHeaderData(1,Qt::Horizontal,"密码");
/*设置手动提交，防止误操作*/
this->admin_model->setEditStrategy(QSqlTableModel::OnManualSubmit);
this->student_model->setEditStrategy(QSqlTableModel::OnManualSubmit);
this->teacher_model->setEditStrategy(QSqlTableModel::OnManualSubmit);
}
else
if(this->flag == 2)
{
this->ui->stackedWidget->setCurrentIndex(3);
this->studentself_model = new QSqlTableModel(this);
this->studentself_model->setTable("student_score");//选择数据库
this->ui->student_self_tableView->setModel(this->studentself_model);
/*显示自身的成绩*/
QString str = QString("Name = '%1' ").arg(this->ui->account_lineEdit->text());
this->studentself_model->setFilter(str);
this->studentself_model->select();
this->ui->student_self_tableView->setEditTriggers(QAbstractItemView::NoEditTriggers);//不允许进行编辑、修改
this->studentself_model->setHeaderData(0,Qt::Horizontal,"姓名");
this->studentself_model->setHeaderData(1,Qt::Horizontal,"高等数学");
this->studentself_model->setHeaderData(2,Qt::Horizontal,"大学物理");
this->studentself_model->setHeaderData(3,Qt::Horizontal,"大学英语");
this->studentself_model->setHeaderData(4,Qt::Horizontal,"数据结构");
}
else
if(this->flag == 3)
{
this->ui->stackedWidget->setCurrentIndex(4);
this->teacherself_model = new QSqlTableModel(this);
this->teacherself_model->setTable("student_score");
this->ui->teacherself_tableView->setModel(this->teacherself_model);
this->teacherself_model->select();
this->teacherself_model->setEditStrategy(QSqlTableModel::OnManualSubmit);
this->teacherself_model->setHeaderData(0,Qt::Horizontal,"姓名");
this->teacherself_model->setHeaderData(1,Qt::Horizontal,"高等数学");
this->teacherself_model->setHeaderData(2,Qt::Horizontal,"大学物理");
this->teacherself_model->setHeaderData(3,Qt::Horizontal,"大学英语");
this->teacherself_model->setHeaderData(4,Qt::Horizontal,"数据结构");
}
}
else
{
QMessageBox::warning(nullptr,"Error!","登录失败，请输入正确的账号和密码！");//登录失败、报错
}
}
void MainWindow::on_return_pushButton_clicked()
{
this->ui->stackedWidget->setCurrentIndex(0);
}
void MainWindow::on_confirm_pushButton_clicked() //连接数据库相关
{
this->db_ip = this->ui->ip_lineEdit->text();
this->db_Username = this->ui->account_lineEdit_2->text();
this->db_Password = this->ui->password_lineEdit_2->text();
this->db.setHostName(this->db_ip);
this->db.setDatabaseName(this->db_Databasename);
this->db.setUserName(this->db_Username);
this->db.setPassword(this->db_Password);
if(!(this->db.open()))
{
QMessageBox::warning(nullptr,"错误!",db.lastError().text());
this->ui->stackedWidget->setCurrentIndex(1);
}
else
{
QMessageBox::about(nullptr,"连接成功！","数据库已经成功连接！");
this->ui->ipds_label->setText(this->db_ip);
this->ui->stackedWidget->setCurrentIndex(0);
}
}
void MainWindow::on_admin_checkBox_clicked() //选择admin时
{
this->user_name = this->ui->account_lineEdit->text();
this->user_password = this->ui->password_lineEdit->text();
this->cmd = QString("select * from admin where username = '%1' and password = '%2'").arg(this->user_name).arg(this->user_password); //生成SQL
//qDebug()<cmd<
this->ui->show_admin_label->setText(this->user_name);//切换标签
this->flag = 1;//设置flag
}
void MainWindow::on_student_checkBox_clicked()//选择student时
{
this->user_name = this->ui->account_lineEdit->text();
this->user_password = this->ui->password_lineEdit->text();
this->cmd = QString("select * from student where username = '%1' and password = '%2'").arg(this->user_name).arg(this->user_password);//生成SQL
qDebug()<<this->cmd<<endl;
this->ui->show_student_label->setText(this->user_name);//切换标签
this->flag = 2;//设置flag
//qDebug()<flag;
}
void MainWindow::on_teacher_checkBox_clicked()//选择教师时
{
this->user_name = this->ui->account_lineEdit->text();
this->user_password = this->ui->password_lineEdit->text();
this->cmd = QString("select * from teacher where username = '%1' and password = '%2'").arg(this->user_name).arg(this->user_password);//生成SQL
//qDebug()<cmd<
this->ui->show_teacher_label->setText(this->user_name);//切换标签
this->flag = 3;//设置flag
}
void MainWindow::on_add_pushButton_clicked() //添加空行
{
QSqlRecord record = this->teacher_model->record();
int row = this->teacher_model->rowCount();//获取行数
this->teacher_model->insertRecord(row,record);//插入
}
void MainWindow::on_save_pushButton_clicked()
{
this->teacher_model->submitAll();//点击保存后提交SQL
}
void MainWindow::on_cancel_pushButton_clicked()
{
this->teacher_model->revertAll();
this->teacher_model->submitAll();
}
void MainWindow::on_delete_pushButton_clicked()
{
QItemSelectionModel* select = this->ui->teacher_tableView->selectionModel();
QModelIndexList list = select->selectedRows();
for(int i = 0 ; i < list.size() ; i++ )
{
this->teacher_model->removeRow(list.at(i).row());
}
}
void MainWindow::on_search_pushButton_clicked()
{
QString name = this->ui->search_lineEdit->text();
if(!(name == '#'))
{
QString str = QString("username = '%1' ").arg(name);
this->teacher_model->setFilter(str);
this->teacher_model->select();
}
else
{
this->teacher_model->select();
}
}
void MainWindow::on_add_pushButton_2_clicked()
{
QSqlRecord record = this->admin_model->record();
int row = this->admin_model->rowCount();
this->admin_model->insertRecord(row,record);
}
void MainWindow::on_save_pushButton_2_clicked()
{
this->admin_model->submitAll();
}
void MainWindow::on_cancel_pushButton_2_clicked()
{
this->admin_model->revertAll();
this->admin_model->submitAll();
}
void MainWindow::on_delete_pushButton_2_clicked()
{
QItemSelectionModel* select = this->ui->admin_tableView->selectionModel();
QModelIndexList list = select->selectedRows();
for(int i = 0 ; i < list.size() ; i++ )
{
this->admin_model->removeRow(list.at(i).row());
}
}
void MainWindow::on_search_pushButton_2_clicked()
{
QString name = this->ui->search_lineEdit_2->text();
if(!(name == '#'))
{
QString str = QString("username = '%1' ").arg(name);
this->admin_model->setFilter(str);
this->admin_model->select();
}
else
{
this->admin_model->select();
}
}
void MainWindow::on_add_pushButton_3_clicked()
{
QSqlRecord record = this->student_model->record();
int row = this->student_model->rowCount();
this->student_model->insertRecord(row,record);
}
void MainWindow::on_save_pushButton_3_clicked()
{
this->student_model->submitAll();
}
void MainWindow::on_cancel_pushButton_3_clicked()
{
this->admin_model->revertAll();
this->admin_model->submitAll();
}
void MainWindow::on_delete_pushButton_3_clicked()
{
QItemSelectionModel* select = this->ui->student_tableView->selectionModel();
QModelIndexList list = select->selectedRows();
for(int i = 0 ; i < list.size() ; i++ )
{
this->student_model->removeRow(list.at(i).row());
}
}
void MainWindow::on_search_pushButton_3_clicked()
{
QString name = this->ui->search_lineEdit_3->text();
if(!(name == '#'))
{
QString str = QString("username = '%1' ").arg(name);
this->student_model->setFilter(str);
this->student_model->select();
}
else
{
this->student_model->select();
}
}
void MainWindow::on_add_pushButton_4_clicked()
{
QSqlRecord record = this->teacherself_model->record();
int row = this->teacherself_model->rowCount();
this->teacherself_model->insertRecord(row,record);
}
void MainWindow::on_save_pushButton_4_clicked()
{
this->teacherself_model->submitAll();
}
void MainWindow::on_cancel_pushButton_4_clicked()
{
this->teacherself_model->revertAll();
this->teacherself_model->submitAll();
}
void MainWindow::on_delete_pushButton_4_clicked()
{
QItemSelectionModel* select = this->ui->teacherself_tableView->selectionModel();
QModelIndexList list = select->selectedRows();
for(int i = 0 ; i < list.size() ; i++ )
{
this->teacherself_model->removeRow(list.at(i).row());
}
}
void MainWindow::on_search_pushButton_4_clicked()
{
QString name = this->ui->search_lineEdit_4->text();
if(!(name == '#'))
{
QString str = QString("Name = '%1' ").arg(name);
this->teacherself_model->setFilter(str);
this->teacherself_model->select();
}
else
{
this->teacherself_model->select();
}
}
（四）main.cpp
#include "mainwindow.h"
#include 五、写在最后的话
该小程序是本人结合大一的上学期的知识写的一个小总结，本人学期编程也只有半年而已，难免有一些描述的不清楚，或者逻辑混乱的地方，还请多多指教。
在此感谢我的授课老师，感谢老师这段时间的付出、指导、教诲；感谢CSDN平台，感谢平台为我们普通学生提供的学习平台；感谢党和国家，感谢党和国家为莘莘学子构建了现今的时代。
PS：相应的注释并不完善，今后我会补充的。
本人今后也会在CSDN上分析一些学习感悟，希望您能够关注、留言、私信，感谢您的观看。