思维导图:
widget.h
#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>
#include <QSqlDatabase>//数据库管理类
#include <QSqlQuery>//执行sql语句类
#include <QSqlRecord>//数据库记录类
#include <QSqlError>//数据库错误类
#include <QMessageBox>namespace Ui {
class Widget;
}class Widget : public QWidget
{Q_OBJECTpublic:explicit Widget(QWidget *parent = nullptr);~Widget();private slots:void on_addBtn_clicked();void on_showBtn_clicked();void on_delBtn_clicked();void on_dataBtn_clicked();private:Ui::Widget *ui;QSqlDatabase db;
};#endif // WIDGET_H
main.cpp
#include "widget.h"
#include <QApplication>int main(int argc, char *argv[])
{QApplication a(argc, argv);Widget w;w.show();return a.exec();
}
widget.cpp
#include "widget.h"
#include "ui_widget.h"Widget::Widget(QWidget *parent) :QWidget(parent),ui(new Ui::Widget)
{ui->setupUi(this);//判断是否有该数据库if(!db.contains("stuInfo.db")){//说明数据库不存在db = QSqlDatabase::addDatabase("QSQLITE");//给刚刚创建的数据库命名db.setDatabaseName("stuInfo");}//打开数据库if(!db.open()){QMessageBox::information(this,"错误","打开数据库失败");return;}//创建数据库表//实例化一个执行sql语句的对象QSqlQuery query;//准备sql语句QString sql="create table if not exists stu_info_table( ""id integer primary key autoincrement,""numb integer,""name varchar(20),""sex varchar(4),""score integer)";//执行sql语句if(query.exec(sql)){QMessageBox::information(this,"","创建数据库表成功");}else {QMessageBox::information(this,"","创建数据库表失败");}}Widget::~Widget()
{delete ui;
}//添加按扭对应的槽函数处理
void Widget::on_addBtn_clicked()
{//获取ui界面上的成员信息int numb = ui->stuEdit->text().toUInt();QString name = ui->nameEdit->text();QString sex = ui->sexEdit->text();int score = ui->socreEdit->text().toUInt();//判断用户是否填写完整信息if(numb == 0 || name.isEmpty() || sex.isEmpty() || score == 0){QMessageBox::information(this,"","请将信息填写完整");return;}//实例化一个执行sql语句的对象QSqlQuery query;//准备sql语句QString sql = QString("insert into stu_info_table(numb,name,sex,score)""values(%1,'%2','%3',%4)").arg(numb).arg(name).arg(sex).arg(score);//执行sql语句if(query.exec(sql)){QMessageBox::information(this,"","添加成功");}else {QMessageBox::information(this,"","添加失败");}
}//显示功能
void Widget::on_showBtn_clicked()
{//准备sql语句QSqlQuery query;//ui->tableWidget->clear();QString sql = "select * from stu_info_table";if(!query.exec(sql)){QMessageBox::information(this,"","查询失败");return;}int i=0;//记录行号while(query.next()){for(int j=0;j<query.record().count();j++)//遍历列数{ui->tableWidget->setItem(i,j,new QTableWidgetItem(query.value(j+1).toString()));}i++;}
}//删除成员
void Widget::on_delBtn_clicked()
{int numb = ui->stuEdit->text().toUInt();QString name = ui->nameEdit->text();QString sex = ui->sexEdit->text();int score = ui->socreEdit->text().toUInt();//准备sql语句QSqlQuery query;//QString sql = QString("delete from stu_info_table where numb=%1 and name='%2' and sex='%3' and score='%4'").arg(numb).arg(name).arg(sex).arg(score);QString sql ;sql = QString("delete from stu_info_table where name='%2'").arg(name);if(numb != 0){sql = QString("delete from stu_info_table where numb=%1").arg(numb);}else if (!name.isEmpty()){sql = QString("delete from stu_info_table where name='%2'").arg(name);}else if (!sex.isEmpty()){sql = QString("delete from stu_info_table where sex='%3'").arg(sex);}else if (score != 0){sql = QString("delete from stu_info_table where score='%4'").arg(score);}if(!query.exec(sql)){QMessageBox::information(this,"","删除失败");return;}
}void Widget::on_dataBtn_clicked()
{int numb = ui->stuEdit->text().toUInt();QString name = ui->nameEdit->text();QString sex = ui->sexEdit->text();int score = ui->socreEdit->text().toUInt();QSqlQuery query;QString sql = QString("update stu_info_table set name='%1',sex='%2',score=%3 where numb=%4").arg(name).arg(sex).arg(score).arg(numb);if(!query.exec(sql)){QMessageBox::information(this,"","修改失败");return;}}
widget.h
#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>
#include <opencv2/opencv.hpp>
#include <iostream>
#include <math.h>
#include<opencv2/face.hpp>
#include <vector>
#include <map>
#include <QMessageBox>
#include <QDebug>
#include <QFile>
#include <QTextStream>
#include <QDateTime>
#include <QTimerEvent>
#include<QtSerialPort/QtSerialPort>
#include<QtSerialPort/QSerialPortInfo>
using namespace cv;
using namespace cv::face;
using namespace std;namespace Ui {
class Widget;
}class Widget : public QWidget
{Q_OBJECTpublic:explicit Widget(QWidget *parent = 0);~Widget();private:Ui::Widget *ui;
};#endif // WIDGET_H
main.cpp
#include "widget.h"
#include <QApplication>int main(int argc, char *argv[])
{QApplication a(argc, argv);Widget w;w.show();//将本地的视频将在到程序中来VideoCapture v;v.open("D:\\opencv\\heads\\01.mp4");//定义一个存放从视频里读取到的一帧图像Mat src;while(v.read(src)){//显示图片imshow("test1",src);if( 27 == waitKey(30)){break;}}Mat gray;//灰度处理while(v.read(src)){cvtColor(src,gray,CV_BGR2GRAY);//显示图片imshow("test2",gray);if( 27 == waitKey(30)){break;}}Mat dst;while(v.read(src)){cvtColor(src,gray,CV_BGR2GRAY);equalizeHist(gray,dst);//显示图片imshow("test3",dst);if( 27 == waitKey(30)){break;}}return a.exec();
}
widget.cpp
#include "widget.h"
#include "ui_widget.h"Widget::Widget(QWidget *parent) :QWidget(parent),ui(new Ui::Widget)
{ui->setupUi(this);
}Widget::~Widget()
{delete ui;
}
效果图: