【完整源码】基于Qt/MySQL的学生管理系统

#include "mysql.h" #include "mainwindow.h" #include <QDebug> My_Sql::My_Sql() { } void My_Sql::initsql() { QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL"); db.setHostName("localhost"); db.setUserName("root"); db.setPassword("123456"); db.setDatabaseName("student"); if(db.open()) { qDebug() << "database is established!"; createtable(); return; } else { qDebug() << "build error!"; return; } } // 创建数据库操作 void My_Sql::createtable() { query = new QSqlQuery; //建表 query->exec("create table user(name VARCHAR(30) UNIQUE NOT NULL, passward VARCHAR(30), identify VARCHAR(30) PRIMARY KEY)"); query->exec("create table studentInfo(stuaccount VARCHAR(30) PRIMARY KEY UNIQUE NOT NULL, stuname VARCHAR(30), stusex ENUM('Male', 'Female') NOT NULL, stuage INT, identify VARCHAR(30) UNIQUE NOT NULL, tel VARCHAR(20), enroll_time DATE, leave_time DATE, scondition enum('Studying', 'Educated', 'Off'), stu_text TEXT)"); query->exec("create table healthInfo(stuaccount VARCHAR(30) PRIMARY KEY UNIQUE NOT NULL, stuname VARCHAR(30) NOT NULL, height FLOAT, weight FLOAT, differentiate ENUM('Normal', 'Weak', 'Blind'), left_sight FLOAT, right_sight FLOAT, left_ear ENUM('Normal','Weak'), right_ear ENUM('Normal','Weak'), legs ENUM('Normal','Diff'), pressure ENUM('Normal','High','Low'), history VARCHAR(50), h_text TEXT)"); query->exec("create table courseInfo(classid INT PRIMARY KEY UNIQUE NOT NULL AUTO_INCREMENT, classname VARCHAR(30), class_text TEXT)"); query->exec("create table gradeInfo(stuaccount VARCHAR(30) PRIMARY KEY UNIQUE NOT NULL, classid INT NOT NULL, lasttime date, times INT default 1, grade float default 0, constraint grade_acc_fk FOREIGN KEY(stuaccount) REFERENCES studentInfo(stuaccount), constraint grade_cid_fk FOREIGN KEY(classid) REFERENCES courseInfo(classid))"); //添加管理员 query->exec("insert into user value('root', '123456', 'root')"); //索引 query->exec("create index int_name ON studentInfo(stuname)"); query->exec("alter table studentInfo ADD INDEX ind_con(scondition)"); query->exec("create index ind_hname ON healthInfo(stuname)"); //视图 query->exec("create VIEW grade_view AS SELECT g.stuaccount, s.stuname, c.classname, g.lasttime, g.times, g.grade FROM studentinfo s, courseinfo c, gradeinfo g WHERE g.stuaccount = s.stuaccount AND g.classid = c.classid"); //三种触发器 query->exec("CREATE TRIGGER license_stu AFTER INSERT ON licenseInfo FOR EACH ROW BEGIN UPDATE studentInfo SET leave_time=NEW.recv_time, scondition = 'Educated' WHERE stuaccount = NEW.stuaccount; END"); query->exec("CREATE TRIGGER update_name AFTER UPDATE ON studentinfo FOR EACH ROW BEGIN UPDATE healthinfo SET stuname = NEW.stuname WHERE stuaccount = NEW.stuaccount;END"); query->exec("CREATE TRIGGER delete_stu AFTER DELETE ON studentinfo FOR EACH ROW BEGIN DELETE FROM gradeinfo WHERE stuaccount = OLD.stuaccount; DELETE FROM healthinfo WHERE stuaccount = OLD.stuaccount; DELETE FROM licenseinfo WHERE stuaccount = OLD.stuaccount;END"); } bool My_Sql::inituser(QString name, QString identify, QString passward) { query = new QSqlQuery; QString str = QString("insert into user value('%1', '%2', '%3')").arg(name).arg(identify).arg(passward); bool ret = query->exec(str); return ret; } bool My_Sql::loguser(QString name, QString passward) { query = new QSqlQuery; QString str = QString("select * from user where name = '%1' and passward = '%2'").arg(name).arg(passward); query->exec(str); query->last(); int record = query->at() + 1; if(record == 0) { return false; } MainWindow* MW = MainWindow::getIntence(); MW->passward = query->value(1).toString(); return true; } bool My_Sql::addstu(stuInfo *stu) { query = new QSqlQuery; QString str = QString("insert into studentInfo value('%1', '%2', '%3', %4, '%5', '%6', '%7', '%8', '%9', '%10')") �