add mysql support and updata login system

Hotel_Management.pro

@@ -1,4 +1,4 @@
-QT       += core gui
+QT       += core gui sql
 
 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
 

Hotel_Management.pro.user

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE QtCreatorProject>
-<!-- Written by QtCreator 9.0.2, 2023-08-15T17:53:25. -->
+<!-- Written by QtCreator 9.0.2, 2023-08-17T17:27:20. -->
 <qtcreator>
  <data>
   <variable>EnvironmentId</variable>

login.cpp

@@ -17,6 +17,21 @@ login::login(QWidget *parent)
     bg->setScaledContents(true);
     bg->setPixmap(QPixmap(":/image/bg/login.png"));
     bg->lower();
+
+    db = QSqlDatabase::addDatabase("QMYSQL");
+    db.setDatabaseName("hotel");
+    db.setHostName("localhost");
+    db.setPort(3306);
+    db.setUserName("root");
+    db.setPassword("111111");
+    if(db.open()){
+        qDebug("database connect succeed");
+    }else{
+        qDebug("database connect failed");
+    }
+
+    ui->lineEdit_password->setEchoMode(QLineEdit::Password);
+
 }
 
 login::~login()
@@ -29,7 +44,7 @@ void login::paintEvent(QPaintEvent*)
     bg->resize(ui->widget->size());
 }
 
-void login::on_pushButton_clicked()
+void login::on_btn_info_clicked()
 {
     QMessageBox::about(this, tr("关于我们"), tr("《宾馆客房管理系统》\n\n开发团队：\n\n项目总监：\n美术设计：\n程序设计：    \n界面设计：\n系统测试：\n\nCopyright© 2023 xxx All Right Reserved."));
 }
@@ -58,3 +73,52 @@ void login::on_pushButton_4_clicked()
     admin->show();
 }
 
+
+void login::on_btn_login_clicked()
+{
+    bool isfind = false;
+    QString account = ui->lineEdit_account->text();
+    QString password = ui->lineEdit_password->text();
+    QSqlQuery query;
+    query.exec("select * from customer");
+    //管理员身份判断
+    if(QString::compare(account,"admin")==0&&QString::compare(password,"111111")==0){
+        qDebug("login succeed");
+        isfind=true;
+        administration *admin = new administration;
+        this->hide();
+        admin->show();
+    }else{
+    //客户身份判断
+        while(query.next()){
+            if(QString::compare(query.value(0).toString(),account)==0&&QString::compare(query.value(1).toString(),password)==0){
+                qDebug("login succeed");
+                isfind=true;
+                customer *cus = new customer;
+                this->hide();
+                cus->show();
+                break;
+            }
+        }
+    }
+    //前台身份判断
+    if(!isfind){
+        query.exec("select * from employee");
+        while(query.next()){
+            if(QString::compare(query.value(0).toString(),account)==0&&QString::compare(query.value(1).toString(),password)==0){
+                qDebug("login succeed");
+                isfind=true;
+                receptionist *rec = new receptionist;
+                this->hide();
+                rec->show();
+                break;
+            }
+        }
+    }
+    //未找到，提示错误
+    if(!isfind){
+        qDebug("login failed");
+        QMessageBox::warning(this,tr("登录提示"),tr("账号或密码错误！请重新输入"));
+    }
+}
+

login.h

@@ -5,6 +5,9 @@
 #include <QLabel>
 #include <QMessageBox>
 #include <QIcon>
+#include <QSqlDatabase>
+#include <QDebug>
+#include <QSqlQuery>
 
 QT_BEGIN_NAMESPACE
 namespace Ui { class login; }
@@ -22,7 +25,7 @@ protected:
     void paintEvent(QPaintEvent*);
 
 private slots:
-    void on_pushButton_clicked();
+    void on_btn_info_clicked();
 
     void on_pushButton_2_clicked();
 
@@ -30,8 +33,11 @@ private slots:
 
     void on_pushButton_4_clicked();
 
+    void on_btn_login_clicked();
+
 private:
     Ui::login *ui;
     QLabel *bg;
+    QSqlDatabase db;
 };
 #endif // LOGIN_H

login.ui

@@ -87,7 +87,7 @@
       <string>注册</string>
      </property>
     </widget>
-    <widget class="QLabel" name="label">
+    <widget class="QLabel" name="label_account">
      <property name="geometry">
       <rect>
        <x>1250</x>
@@ -108,7 +108,7 @@
       <string>账号：</string>
      </property>
     </widget>
-    <widget class="QLabel" name="label_2">
+    <widget class="QLabel" name="label_password">
      <property name="geometry">
       <rect>
        <x>1250</x>
@@ -129,7 +129,7 @@
       <string>密码：</string>
      </property>
     </widget>
-    <widget class="QLineEdit" name="lineEdit">
+    <widget class="QLineEdit" name="lineEdit_account">
      <property name="geometry">
       <rect>
        <x>1400</x>
@@ -144,7 +144,7 @@
       </font>
      </property>
     </widget>
-    <widget class="QLineEdit" name="lineEdit_2">
+    <widget class="QLineEdit" name="lineEdit_password">
      <property name="geometry">
       <rect>
        <x>1400</x>
@@ -159,7 +159,7 @@
       </font>
      </property>
     </widget>
-    <widget class="QPushButton" name="pushButton">
+    <widget class="QPushButton" name="btn_info">
      <property name="geometry">
       <rect>
        <x>1800</x>
@@ -176,7 +176,7 @@ background-color: rgba(0, 0, 0, 0);</string>
       <string/>
      </property>
     </widget>
-    <widget class="QLabel" name="label_5">
+    <widget class="QLabel" name="label">
      <property name="geometry">
       <rect>
        <x>40</x>