基于QT的超市信息管理系统

源码下及所有文件载链接

传送门

演示视频

一、环境及技术

1、环境

• Qt Creator 5.3
• ODBC Data Sources (32-bit)
• mysql-8.0.28-winx64
• Navicat 15 for MySQL

2、技术

• QT开发
• C++
• mysql

二、项目开发流程

1. 数据库设计
2. 界面UI设计
3. 代码逻辑编写
4. 开发文档编写

三、流程介绍

1、数据库设计

1、1数据库代码

/* Navicat MySQL Data Transfer Source Server : localhost_3306 Source Server Type: MySQL Source Server Version : 80028 Source Host : localhost:3306 Source Schema : shop Target Server Type: MySQL Target Server Version : 80028 File Encoding : 65001 Date: 06/06/2022 20:30:21*/SET NAMES utf8mb4;SET FOREIGN_KEY_CHECKS = 0;-- ------------------------------ Table structure for goods-- ----------------------------DROP TABLE IF EXISTS `goods`;CREATE TABLE `goods`(`id` int NOT NULL COMMENT '商品编号',`name` varchar(255) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT '商品名称',`num` int NOT NULL COMMENT '商品数量',`price` double(10, 2) NOT NULL COMMENT '商品价格',`kind` varchar(255) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT '商品种类',`picture` blob NULL COMMENT '商品图片',PRIMARY KEY (`id`) USING BTREE) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_bin ROW_FORMAT = Dynamic;-- ------------------------------ Records of goods-- ----------------------------INSERT INTO `goods` VALUES (1, '可乐', 300, 3.00, '饮料', NULL);INSERT INTO `goods` VALUES (2, '上衣', 20, 99.00, '服装', NULL);INSERT INTO `goods` VALUES (3, '大豆油', 300, 55.50, '食品', NULL);-- ------------------------------ Table structure for worker-- ----------------------------DROP TABLE IF EXISTS `worker`;CREATE TABLE `worker`(`id` int NOT NULL AUTO_INCREMENT COMMENT '职工编号',`name` varchar(255) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT '职工姓名',`phone` varchar(255) CHARACTER SET utf8 COLLATE utf8_bin NULL DEFAULT NULL COMMENT '职工电话',`usename` varchar(255) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT '职工账号',`password` varchar(255) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT '职工密码',`address` varchar(255) CHARACTER SET utf8 COLLATE utf8_bin NULL DEFAULT NULL COMMENT '职工联系地址',`picture` blob NULL COMMENT '职工照片',PRIMARY KEY (`id`) USING BTREE,CONSTRAINT `id` FOREIGN KEY (`id`) REFERENCES `goods` (`id`) ON DELETE RESTRICT ON UPDATE RESTRICT) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_bin ROW_FORMAT = Dynamic;-- ------------------------------ Records of worker-- ----------------------------INSERT INTO `worker` VALUES (1, '马师傅', '123', '123', '123', '陕西省西安市', NULL);INSERT INTO `worker` VALUES (2, '石师傅', '1234', '1234', '1234', '陕西省西安市', NULL);INSERT INTO `worker` VALUES (3, '野球帝', '12345', '12345', '12345', '陕西省西安市', NULL);SET FOREIGN_KEY_CHECKS = 1;

1、2 表设计

• goods表

• worker表

1、3 视图

2、界面UI设计

2、1 登录界面

• 效果图

• 结构说明

2、2 系统展示界面

3、代码逻辑编写

3、1 登录逻辑

login.h:

#ifndef LOGIN_H#define LOGIN_H#include #include//查询mysql数据库#include#include//包含MD5算法库#include #includenamespace Ui {class Login;}class Login : public QDialog{Q_OBJECTpublic:explicit Login(QWidget *parent = 0);~Login();//鼠标移动void mouseMoveEvent(QMouseEvent *event);//鼠标点击void mousePressEvent(QMouseEvent *event);//鼠标拖动void mouseReleaseEvent(QMouseEvent *event);private slots://关闭窗口void on_pushButton_clicked();//登录事件void on_btn_login_clicked();private:Ui::Login *ui; QPoint z;};#endif // LOGIN_H

login.cpp:

#include "login.h"#include "ui_login.h"#include#include#include#includeLogin::Login(QWidget *parent) :QDialog(parent),ui(new Ui::Login){ui->setupUi(this);//去掉系统无边框this->setWindowFlags(Qt::FramelessWindowHint);//阴影边框效果QGraphicsDropShadowEffect *shadow =new QGraphicsDropShadowEffect();shadow->setBlurRadius(20);shadow->setColor(Qt::black);shadow->setOffset(0);ui->showwidget->setGraphicsEffect(shadow);//设置父窗口为透明this->setAttribute(Qt::WA_TranslucentBackground);//用户名焦点ui->Username->setFocus();}Login::~Login(){delete ui;}//鼠标移动void Login::mouseMoveEvent(QMouseEvent *event){QWidget::mouseMoveEvent(event);//鼠标相对于桌面左上角的位置，鼠标的全局位置QPoint y = event->globalPos();QPoint x =y-this->z;this->move(x);}//鼠标点击void Login::mousePressEvent(QMouseEvent *event){QWidget::mousePressEvent(event);//鼠标相对于桌面左上角的位置，鼠标的全局位置QPoint y = event->globalPos();//窗口左上角相对于桌面左上角的位置QPoint x =this->geometry().topLeft();this->z = y-x; //定值}//鼠标释放void Login::mouseReleaseEvent(QMouseEvent *event){QWidget::mouseReleaseEvent(event);//清空this->z=QPoint();}//关闭窗口void Login::on_pushButton_clicked(){this->close();}//登录事件void Login::on_btn_login_clicked(){if(!ui->Password->text().isEmpty()){QSqlQuery query;query.exec("select password from worker where usename='" + ui->Username->text()+"'");query.next();if(query.value(0).toString()==ui->Password->text()){//验证通过QDialog::accept();}else{//信息错误弹出警告QMessageBox::warning(this,tr("密码或账号错误！"),tr("请输入正确的信息"),QMessageBox::Ok);//清空输入框ui->Username->clear();ui->Password->clear();}}else{ui->Password->setFocus();}}

3、2 系统功能逻辑

mainwindow.h:

#ifndef MAINWINDOW_H#define MAINWINDOW_H#include #include#include#include#include //mysql数据库类#include//mysql表模型库#include //mysql查询类库#include#include#include //图形处理类库#include #include#include #include #include#includenamespace Ui {class MainWindow;}class MainWindow : public QMainWindow{Q_OBJECTpublic:explicit MainWindow(QWidget *parent = 0);~MainWindow();/*鼠标事件*///鼠标移动void mouseMoveEvent(QMouseEvent *event);//鼠标点击void mousePressEvent(QMouseEvent *event);//鼠标拖动void mouseReleaseEvent(QMouseEvent *event);/*数据库事件*///获取职工的数量void workers_num();//获取商品的数量void goods_num();//商品信息展示在列表void goods_show();//职工信息展示在列表void workers_show();//查询一条商品信息void querygoods(QString key,QString value);//查询一条职工信息void queryworkers(QString key,QString value);//清楚数据框中内容void goodsdata_claer();void workersdata_claer();//职工数量int workersnum;//商品数量int goodsnum;private slots://缩小窗口void on_btn_reduce_clicked();//放大窗口void on_btn_magnify_clicked();//关闭窗口void on_btn_close_clicked();//跳转商品信息管理页面void on_btn_goods_clicked();//跳转职工信息管理界面void on_btn_workers_clicked();//增加职工信息void on_addworkers_btn_clicked();//删除职工信息void on_deleteworkers_btn_clicked();//修改职工信息void on_changeworkers_btn_clicked();//查询职工信息void on_selectworkers_btn_clicked();//增加商品信息void on_addgoods_btn_clicked();//删除商品信息void on_deletegoods_btn_clicked();//修改商品信息void on_changegoods_btn_clicked();//查询商品信息void on_selectgoods_btn_clicked();//上传商品照片void on_goods_upload_clicked();//上传职工照片void on_workers_uoload_clicked();//显示全部职工信息void on_showworkers_btn_clicked();//显示全部商品信息void on_showgoods_btn_clicked();//列表点击事件void on_workers_tableWidget_cellDoubleClicked(int row, int column);void on_goods_tableWidget_cellDoubleClicked(int row, int column);private:Ui::MainWindow *ui; QPoint z; //图片上传 QImage myPicImg1;QImage myPicImg2;};//访问Mysql数据库的静态方法static bool createMySqlConn(){QSqlDatabase sqldb = QSqlDatabase::addDatabase("QODBC");sqldb.setHostName("127.0.0.1");sqldb.setPort(3306);sqldb.setDatabaseName("MySql");//数据库名称sqldb.setUserName("root");sqldb.setPassword("123456");bool ok = sqldb.open();if(ok){return true;}else{QMessageBox::critical(0,QObject::tr("后台数据库连接失败！"),"无法创建连接！请检查排除故障后重启程序。",QMessageBox::Cancel);return false;}}#endif // MAINWINDOW_H

mainwindow.cpp:

#include "mainwindow.h"#include "ui_mainwindow.h"#include#include#include#include#include#include #include #include#include#include#include#include#includeMainWindow::MainWindow(QWidget *parent) :QMainWindow(parent),ui(new Ui::MainWindow){/*1、无边框效果*/ui->setupUi(this);//去掉系统无边框this->setWindowFlags(Qt::FramelessWindowHint);//阴影边框效果QGraphicsDropShadowEffect *shadow =new QGraphicsDropShadowEffect();shadow->setBlurRadius(20);shadow->setColor(Qt::black);shadow->setOffset(0);ui->centralWidget->setGraphicsEffect(shadow);//设置父窗口为透明this->setAttribute(Qt::WA_TranslucentBackground);/*2、设置登录后的初始页面——商品信息管理页面*/ui->stackedWidget->setCurrentIndex(0);/*3、展示表格宽高设置*///// 表格宽度随内容自动扩展//ui->workers_tableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::ResizeToContents);//ui->goods_tableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::ResizeToContents);//// 表格高度随内容自动扩展//ui->workers_tableWidget->verticalHeader()->setSectionResizeMode(QHeaderView::ResizeToContents);//ui->goods_tableWidget->verticalHeader()->setSectionResizeMode(QHeaderView::ResizeToContents); /*3、展示表格宽高设置，自动分配大小*/ui->workers_tableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);//平均分配列宽ui->workers_tableWidget->verticalHeader()->setSectionResizeMode(QHeaderView::Stretch);//平均分配行宽ui->goods_tableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);//平均分配列宽ui->goods_tableWidget->verticalHeader()->setSectionResizeMode(QHeaderView::Stretch);//平均分配行宽/*4、设置单元格不可以被编辑*/ui->workers_tableWidget->setEditTriggers(QAbstractItemView::NoEditTriggers);ui->goods_tableWidget->setEditTriggers(QAbstractItemView::NoEditTriggers);//5、信息展示//职工信息展示workers_show();//商品信息展示goods_show();}MainWindow::~MainWindow(){delete ui;}/*1、鼠标事件*///鼠标移动void MainWindow::mouseMoveEvent(QMouseEvent *event){QWidget::mouseMoveEvent(event);//鼠标相对于桌面左上角的位置，鼠标的全局位置QPoint y = event->globalPos();QPoint x =y-this->z;this->move(x);}//鼠标点击void MainWindow::mousePressEvent(QMouseEvent *event){QWidget::mousePressEvent(event);//鼠标相对于桌面左上角的位置，鼠标的全局位置QPoint y = event->globalPos();//窗口左上角相对于桌面左上角的位置QPoint x =this->geometry().topLeft();this->z = y-x; //定值}//鼠标释放void MainWindow::mouseReleaseEvent(QMouseEvent *event){QWidget::mouseReleaseEvent(event);//清空this->z=QPoint();}/*2、获取列表的行数*///获取职工的数量void MainWindow::workers_num(){ QSqlQuery query; //查询数据的所有行和列 query.exec("SELECT * FROM worker"); QSqlQueryModel *queryModel = new QSqlQueryModel(); queryModel->setQuery(query); workersnum=queryModel->rowCount();} //获取商品的数量void MainWindow::goods_num(){QSqlQuery query;//查询数据的所有行和列query.exec("SELECT * FROM goods");QSqlQueryModel *queryModel = new QSqlQueryModel();queryModel->setQuery(query);goodsnum=queryModel->rowCount();}/*3、信息展示*///3、1商品信息展示在列表void MainWindow::goods_show(){/*设置信息管理界面的标题*/goods_num();QStringList goods_headers;//列设置ui->goods_tableWidget->setColumnCount(6);//表头设置goods_headers << "商品编号" << "商品名称" << "商品数量" << "商品价格"<< "商品种类"<goods_tableWidget->setHorizontalHeaderLabels(goods_headers);//行设置ui->goods_tableWidget->setRowCount(goodsnum);//查询所有信息QString sql =QString("select * from goods ");QSqlQuery qry;//将信息展示在列表if(qry.exec(sql)){for(int i =0;qry.next();i++){ui->goods_tableWidget->setItem(i,0,new QTableWidgetItem(qry.value(0).toString()));ui->goods_tableWidget->setItem(i,1,new QTableWidgetItem(qry.value(1).toString()));ui->goods_tableWidget->setItem(i,2,new QTableWidgetItem(qry.value(2).toString()));ui->goods_tableWidget->setItem(i,3,new QTableWidgetItem(qry.value(3).toString()));ui->goods_tableWidget->setItem(i,4,new QTableWidgetItem(qry.value(4).toString()));//展示图片在列表QPixmap photo;QLabel *label = new QLabel;photo.loadFromData(qry.value(5).toByteArray(),"JPG");//图片自适应label大小photo.scaled(label->size(),Qt::KeepAspectRatio);label->setScaledContents(true);label->setPixmap(photo);ui->goods_tableWidget->setCellWidget(i,5,label);}}}//3、2职工信息展示在列表void MainWindow::workers_show(){/*设置信息管理界面的标题*/workers_num();QStringList worker_headers;//列设置ui->workers_tableWidget->setColumnCount(7);worker_headers << "职工编号" << "职工姓名" << "职工电话" << "职工账号"<< "职工密码"<< "职工地址"<workers_tableWidget->setHorizontalHeaderLabels(worker_headers);//行设置ui->workers_tableWidget->setRowCount(workersnum);//查询所有信息QString sql =QString("select * from worker ");QSqlQuery qry;if(qry.exec(sql)){for(int i =0;qry.next();i++){ui->workers_tableWidget->setItem(i,0,new QTableWidgetItem(qry.value(0).toString()));ui->workers_tableWidget->setItem(i,1,new QTableWidgetItem(qry.value(1).toString()));ui->workers_tableWidget->setItem(i,2,new QTableWidgetItem(qry.value(2).toString()));ui->workers_tableWidget->setItem(i,3,new QTableWidgetItem(qry.value(3).toString()));ui->workers_tableWidget->setItem(i,4,new QTableWidgetItem(qry.value(4).toString()));ui->workers_tableWidget->setItem(i,5,new QTableWidgetItem(qry.value(5).toString()));//展示图片在列表QPixmap photo;QLabel *label = new QLabel;photo.loadFromData(qry.value(6).toByteArray(),"JPG");//图片自适应label大小photo.scaled(label->size(),Qt::KeepAspectRatio);label->setScaledContents(true);label->setPixmap(photo);ui->workers_tableWidget->setCellWidget(i,6,label);}}}/*配合查询功能使用*///将查询的商品信息展示在列表void MainWindow::querygoods(QString key,QString value){////清空列表//for(int row = ui->goods_tableWidget->rowCount() - 1;row >= 0; row--)//{//ui->goods_tableWidget->removeRow(row);//}//清空列表ui->goods_tableWidget->clearContents();//查找总共有多少条信息QSqlQuery query;QString sql2 =QString("select * from goods where "+key+ "= '%1' ").arg(value);query.exec(sql2);QSqlQueryModel *queryModel = new QSqlQueryModel();queryModel->setQuery(query);int querygoodsnum=queryModel->rowCount();ui->goods_tableWidget->setRowCount(querygoodsnum);//查询所有信息QString sql =QString("select * from goods where "+key+ "= '%1' ").arg(value);QSqlQuery qry;//将信息展示在列表if(qry.exec(sql)){for(int i =0;qry.next();i++){ui->goods_tableWidget->setItem(i,0,new QTableWidgetItem(qry.value(0).toString()));ui->goods_tableWidget->setItem(i,1,new QTableWidgetItem(qry.value(1).toString()));ui->goods_tableWidget->setItem(i,2,new QTableWidgetItem(qry.value(2).toString()));ui->goods_tableWidget->setItem(i,3,new QTableWidgetItem(qry.value(3).toString()));ui->goods_tableWidget->setItem(i,4,new QTableWidgetItem(qry.value(4).toString()));//展示图片在列表QPixmap photo;QLabel *label = new QLabel;photo.loadFromData(qry.value(5).toByteArray(),"JPG");label->setPixmap(photo);ui->goods_tableWidget->setCellWidget(i,5,label);}}else{ qDebug()<workers_tableWidget->rowCount() - 1;row >= 0; row--)//{//ui->workers_tableWidget->removeRow(row);//}//方法2 清空列表ui->workers_tableWidget->clearContents();//查找总共有多少条信息QSqlQuery query;QString sql2 =QString("select * from worker where"+key+ "= '%1' ").arg(value);query.exec(sql2);QSqlQueryModel *queryModel = new QSqlQueryModel();queryModel->setQuery(query);int queryworkersnum=queryModel->rowCount();ui->workers_tableWidget->setRowCount(queryworkersnum);//查询所有信息QString sql =QString("select * from worker where"+key+ "= '%1'" ).arg(value);QSqlQuery qry;if(qry.exec(sql)){for(int i =0;qry.next();i++){ui->workers_tableWidget->setItem(i,0,new QTableWidgetItem(qry.value(0).toString()));ui->workers_tableWidget->setItem(i,1,new QTableWidgetItem(qry.value(1).toString()));ui->workers_tableWidget->setItem(i,2,new QTableWidgetItem(qry.value(2).toString()));ui->workers_tableWidget->setItem(i,3,new QTableWidgetItem(qry.value(3).toString()));ui->workers_tableWidget->setItem(i,4,new QTableWidgetItem(qry.value(4).toString()));ui->workers_tableWidget->setItem(i,5,new QTableWidgetItem(qry.value(5).toString()));//展示图片在列表QPixmap photo;QLabel *label = new QLabel;photo.loadFromData(qry.value(6).toByteArray(),"JPG");label->setPixmap(photo);ui->workers_tableWidget->setCellWidget(i,6,label);}}else{qDebug()<goods_id->clear();ui->goods_name->clear();ui->goods_num->clear();ui->goods_price->clear();ui->goods_kind->clear();ui->goods_picture->clear();}void MainWindow::workersdata_claer(){ui->workers_id->clear();ui->workers_name->clear();ui->workers_phone->clear();ui->workers_usename->clear();ui->workers_password->clear();ui->workers_addres->clear();ui->workers_picture->clear();}/*3、窗口事件*///缩小按钮void MainWindow::on_btn_reduce_clicked(){ this->showMinimized();}//放大按钮void MainWindow::on_btn_magnify_clicked(){//判断窗口所处在的大小状况if(this->isMaximized()){this->showNormal();}else{this->showMaximized();}}//关闭按钮void MainWindow::on_btn_close_clicked(){this->close();}/*4、跳转界面事件*///跳转商品信息管理页面void MainWindow::on_btn_goods_clicked(){ui->stackedWidget->setCurrentIndex(0);}//跳转职工信息管理界面void MainWindow::on_btn_workers_clicked(){ui->stackedWidget->setCurrentIndex(1);}/*4、职工功能*///4、1增加职工信息void MainWindow::on_addworkers_btn_clicked(){ //插入一条职工信息QSqlQuery query;QString name =ui->workers_name->text();QString phone =ui->workers_phone->text();QString usename=ui->workers_usename->text();QString passworad=ui->workers_password->text();QString address=ui->workers_addres->text();query.prepare("insert into worker(name,phone,usename,password,address)""values (" />workers_id->text().isEmpty()){ int id = ui->workers_id->text().toInt(); QString sql = QString("delete from worker where id='%1'").arg(id); if(query.exec(sql)){ QMessageBox::information(0,QObject::tr("提示"),"删除成功"); }else{ QMessageBox::information(0,QObject::tr("提示"),"请输入正确的职工编号或姓名"); } }else if(!ui->workers_name->text().isEmpty()){QString name = ui->workers_name->text();QString sql = QString("delete from worker where name='%1'").arg(name); if(query.exec(sql)){ QMessageBox::information(0,QObject::tr("提示"),"删除成功"); }else{ QMessageBox::information(0,QObject::tr("提示"),"请输入正确的职工编号或姓名"); } }else{ QMessageBox::information(0,QObject::tr("提示"),"请输入职工编号或姓名"); } //刷新页面 workers_show(); //清楚输入的数据 workersdata_claer();}//4、3修改职工信息void MainWindow::on_changeworkers_btn_clicked(){//修改一条职工信息QSqlQuery query;QString id = ui->workers_id->text();QString name =ui->workers_name->text();QString phone =ui->workers_phone->text();QString usename=ui->workers_usename->text();QString passworad=ui->workers_password->text();QString address=ui->workers_addres->text();QString sql = QString("update worker set name='%1', phone='%2',usename='%3',password='%4', address='%5' where id ='%6'").arg(name).arg(phone).arg(usename).arg(passworad).arg(address).arg(id);if(!query.exec(sql)){//加入失败弹出警告QMessageBox::warning(this,tr("修改职工信息失败！"),tr("请完善信息,职工编号不用输入！"),QMessageBox::Ok);qDebug()<< query.lastError();}else{QMessageBox::information(0,QObject::tr("提示"),"成功修改职工信息");}if(myPicImg2.isNull()){ qDebug()<workers_id->text().isEmpty()){QString key = "id";QString value=ui->workers_id->text();queryworkers(key,value);}else if(!ui->workers_name->text().isEmpty()){QString key = "name";QString value=ui->workers_name->text();queryworkers(key,value);}else if(!ui->workers_phone->text().isEmpty()){QString key = "phone";QString value=ui->workers_phone->text();queryworkers(key,value);}else if(!ui->workers_usename->text().isEmpty()){QString key = "usename";QString value=ui->workers_usename->text();queryworkers(key,value);}else if(!ui->workers_password->text().isEmpty()){QString key = "password";QString value=ui->workers_password->text();queryworkers(key,value);}else if(!ui->workers_addres->text().isEmpty()){QString key = "addres";QString value=ui->workers_addres->text();queryworkers(key,value);}else{QMessageBox::information(0,QObject::tr("提示"),"请输入信息!");}}//4、5显示全部职工信息void MainWindow::on_showworkers_btn_clicked(){workers_show();}/*5、商品功能*///5、1增加商品信息void MainWindow::on_addgoods_btn_clicked(){ //插入一条商品信息QSqlQuery query;QString name = ui->goods_name->text();int num = ui->goods_num->text().toInt();double price = ui->goods_price->text().toDouble();QString kind = ui->goods_kind->text();query.prepare("insert into goods(name,num,price,kind)""values(?,?,?,?)");query.addBindValue(name);query.addBindValue(num);query.addBindValue(price);query.addBindValue(kind);if(!query.exec()){//加入失败弹出警告QMessageBox::warning(this,tr("增加商品信息失败！"),tr("请完善信息,商品编号不用输入！"),QMessageBox::Ok);qDebug()<goods_id->text().isEmpty()){ int id = ui->goods_id->text().toInt(); QString sql = QString("delete from goods where id='%1'").arg(id); if(query.exec(sql)){ QMessageBox::information(0,QObject::tr("提示"),"删除成功"); }else{ QMessageBox::information(0,QObject::tr("提示"),"请输入正确的商品编号或名称"); qDebug()<goods_name->text().isEmpty()){QString name = ui->goods_name->text();QString sql = QString("delete from goods where name='%1'").arg(name); if(query.exec(sql)){ QMessageBox::information(0,QObject::tr("提示"),"删除成功"); }else{ QMessageBox::information(0,QObject::tr("提示"),"请输入正确的商品编号或名称"); qDebug()<goods_id->text();QString name =ui->goods_name->text();QString num =ui->goods_num->text();QString price=ui->goods_price->text();QString kind=ui->goods_kind->text();QString sql = QString("update goods set name='%1', num='%2',price='%3',kind='%4' where id ='%5'").arg(name).arg(num).arg(price).arg(kind).arg(id);if(!query.exec(sql)){//加入失败弹出警告QMessageBox::warning(this,tr("修改商品信息失败！"),tr("请完善信息,商品编号不用输入！"),QMessageBox::Ok);qDebug()<< query.lastError();}else{QMessageBox::information(0,QObject::tr("提示"),"成功修改商品信息");}if(myPicImg1.isNull()){ qDebug()<goods_id->text().isEmpty()){QString key = "id";QString value=ui->goods_id->text();querygoods(key,value);}else if(!ui->goods_name->text().isEmpty()){QString key = "name";QString value=ui->goods_name->text();querygoods(key,value);}else if(!ui->goods_num->text().isEmpty()){QString key = "num";QString value=ui->goods_num->text();querygoods(key,value);}else if(!ui->goods_price->text().isEmpty()){QString key = "price";QString value=ui->goods_price->text();querygoods(key,value);}else if(!ui->goods_kind->text().isEmpty()){QString key = "kind";QString value=ui->goods_kind->text();querygoods(key,value);}else{ QMessageBox::information(0,QObject::tr("提示"),"请输入信息！");}//清楚输入的数据goodsdata_claer();}//5、5显示全部商品信息void MainWindow::on_showgoods_btn_clicked(){goods_show();}/*6、图片上传事件*///6、1商品图片上传事件void MainWindow::on_goods_upload_clicked(){QString picturename = QFileDialog::getOpenFileName(this,"选择商品图片",".","Image File(*.png *.jpg *.jpeg *.bmp)");if(picturename.isEmpty()) return;myPicImg1.load(picturename);//图片自适应标签大小myPicImg1.scaled(ui->goods_picture->size(),Qt::KeepAspectRatio);ui->goods_picture->setScaledContents(true);ui->goods_picture->setPixmap(QPixmap::fromImage(myPicImg1));}//6、2职工照片上传事件void MainWindow::on_workers_uoload_clicked(){QString picturename = QFileDialog::getOpenFileName(this,"选择职工照片",".","Image File(*.png *.jpg *.jpeg *.bmp)");if(picturename.isEmpty()) return;myPicImg2.load(picturename);//图片自适应标签大小myPicImg2.scaled(ui->workers_picture->size(),Qt::KeepAspectRatio);ui->workers_picture->setScaledContents(true);ui->workers_picture->setPixmap(QPixmap::fromImage(myPicImg2));}/*7、职工列表点击事件*///获得该行的内容在输入框中展示，供用户编辑操作void MainWindow::on_workers_tableWidget_cellDoubleClicked(int row, int column){QString workersvalue[6];//根据其行数获得其内容for(int i = 0 ;i workers_tableWidget->item(row,i)->text();workersvalue[i]=value;}ui->workers_id->setText(workersvalue[0]);ui->workers_name->setText(workersvalue[1]);ui->workers_phone->setText(workersvalue[2]);ui->workers_usename->setText(workersvalue[3]);ui->workers_password->setText(workersvalue[4]);ui->workers_addres->setText(workersvalue[5]);}/*8、商品列表点击事件*///获得该行的内容在输入框中展示，供用户编辑操作void MainWindow::on_goods_tableWidget_cellDoubleClicked(int row, int column){QString goodvalue[5];//根据其行数获得其内容for(int i = 0 ;i goods_tableWidget->item(row,i)->text();goodvalue[i]=value;}ui->goods_id->setText(goodvalue[0]);ui->goods_name->setText(goodvalue[1]);ui->goods_num->setText(goodvalue[2]);ui->goods_price->setText(goodvalue[3]);ui->goods_kind->setText(goodvalue[4]);}

main.cpp:

#include "mainwindow.h"#include"login.h"#include #includeint main(int argc, char *argv[]){QApplication a(argc, argv);if(!createMySqlConn()){//初次连接不成功，启动MYsql服务器进程QProcess process;process.start("C:/Users/Administrator/Desktop/启动服务/mysql.bat");//第二次连接if(!createMySqlConn()){return 1;}}//先进行登录，后进入系统Login login;if(login.exec()==QDialog::Accepted){MainWindow w;w.show();return a.exec();}else{return 0;}}

3、3 各功能详解

主函数

程序先调用mainwindow.cpp中连接数据库中的静态方法连接数据库，若初次连接失败，弹出提示框：请排查故障后连接；用户确认后，自行排查问题；同时程序自动打开mysql的服务进程；进行第二次连接，若失败则直接退出程序；反之，成功则直接进入登录界面。

//主函数int main(int argc, char *argv[]){}//访问Mysql数据库的静态方法static bool createMySqlConn(){}

登录功能

通过获取用户输入的账号和密码，点击登录按钮，触发登录点击事件，程序调用void Login::on_btn_login_clicked()函数连接数据库验证其正确性，若正确直接进去系统功能界面；反之，则弹出提示框：请输入正确的信息。

//登录事件void Login::on_btn_login_clicked()

增加信息功能

用户在输入框输入信息后，点击增加信息按钮，触发增加信息事件，程序调用 void on_addgoods_btn_clicked()函数，连接数据库，获得输入框中的信息，向数据库中插入信息；若输入框没有数据，则弹出提示框：请输入正确的信息。

 //增加商品信息void on_addgoods_btn_clicked(); //增加职工信息void on_addworkers_btn_clicked();

删除信息功能

用户通过输入框输入编号或者名称数据后点击删除信息按钮，触发删除西悉尼事件，程序通过一一检查编号、名称框的数据，获得其值，通过连接数据库，向数据库发送删除指令；若两个输入框都没有数据，则弹出提示框：请输入正确的信息。

 //删除职工信息void on_deleteworkers_btn_clicked();//删除商品信息void on_deletegoods_btn_clicked(); 

修改信息功能

用户通过输入框输入要修改的数据后，点击修改信息按钮，触发修改信息事件，程序连接数据库，并根据获得输入框中的信息，向数据库中修改信息指令；若输入框没有数据，则弹出提示框：请输入正确的信息。

 //修改商品信息void on_changegoods_btn_clicked();//修改职工信息void on_changeworkers_btn_clicked();

查询信息功能

用户通过输入在输入框输入要查询的数据，点击查询信息按钮，触发查询信息事件，程序通过一一排查输入框中的值，若全为空，则弹出提示框：请输入正确的信息；若有信息则获取其数据和查询的字段，传递给void querygoods(QString key,QString value)函数，该函数通过连接数据库，获得其信息，并将信息展示在表格中。

//查询职工信息void on_selectworkers_btn_clicked();//查询商品信息void on_selectgoods_btn_clicked();//查询一条商品信息void querygoods(QString key,QString value);//查询一条职工信息void queryworkers(QString key,QString value);

显示全部信息功能

程序调用void goods_show()函数，将其信息展示在列表；

在void goods_show()函数中调用void workers_num()方法，连接数据库获取信息的总数量，设置int workersnum，即总数量；void goods_show()函数以此设置表格的行数；同时连接数据库，获得其信息，并将其信息展示在表格中。

 //商品信息展示在列表void goods_show();//职工信息展示在列表void workers_show();//获取职工的数量void workers_num();//获取商品的数量void goods_num();//职工数量int workersnum;//商品数量int goodsnum;

双击表格内单元格获取信息功能

用户通过双击单元格，触发单元格点击事件，程序通过获得用户双击单元格所在的行数，从表格内获取数据，并展示在输入框内，供用户进行编辑，进行增加信息、删除信息等功能。

//单元格点击事件void on_workers_tableWidget_cellDoubleClicked(int row, int column);void on_goods_tableWidget_cellDoubleClicked(int row, int column);

图片上传功能

用户通过点击上传按钮，触发图片事件，程序打开文件管理器，供用户选择图片，系统以此获得图片，并展示在图片框内，并将其保存在全局变量内，供用户进行增加信息、删除信息等操作；若图片上传失败，则弹出提示框：图片尺寸太大，请缩小后上传。

//上传商品照片void on_goods_upload_clicked();//上传职工照片void on_workers_uoload_clicked(); //图片上传 QImage myPicImg1; QImage myPicImg2;

输入框清除功能

用户每进行一次增删改查等操作后，程序都会自动清楚输入框中的内容

 //清楚数据框中内容void goodsdata_claer();void workersdata_claer();

跳转界面功能

用户点击信息管理按钮后，触发跳转界面事件，程序根据用户单击的按钮信息，跳转到相应的界面

 //跳转商品信息管理页面void on_btn_goods_clicked();//跳转职工信息管理界面void on_btn_workers_clicked();

3、4 .pro工程文件

#-------------------------------------------------## Project created by QtCreator 2022-06-06T11:05:27##-------------------------------------------------QT += core guiQT += sqlgreaterThan(QT_MAJOR_VERSION, 4): QT += widgetsTARGET = Supermarket_systemTEMPLATE = appSOURCES += main.cpp\mainwindow.cpp \login.cppHEADERS+= mainwindow.h \login.hFORMS+= mainwindow.ui \login.uiRESOURCES += \res.qrcCONFIG += C++11

四、程序发布

在编写 Qt 程序的时候，不管我们使用的什么样的 IDE 都可以进行编译版本的切换，如果要发布程序需要切换为 Release 版本（Debug 为调试版本），编译器会对生成的 Release 版可执行程序进行优化，生成的可执行程序会更小。这里以 QtCreator 为例，截图如下：

模式选择完毕之后开始构建当前项目，最后找到生成的带 Release 后缀的构建目录，如下图所示：

将 Release 放在一个单独的文件内

打开 Powershell窗口执行命令：

输入windeployqt.exe 可执行程序的命名+.exe