PyQT5一起学做图书管理系统（12）修改密码

╰+哭是因爲堅強的太久メ 2022-03-14 14:40 271阅读 0赞

# PyQT5一起学做图书管理系统（12）修改密码 #

## 环境 ##

系统：windows10系统  
编辑器：Sublime3  
编程语言：python3+pyqt5

## 前言 ##

数据库设计是个前提哈。  
本来修改密码应该是在前面就应该先弄好的，之前给忘了，这一节补上

## 设计逻辑 ##

修改密码的页面可以参照注册和登陆界面

修改密码，主要需要用户输入学号， 原密码，新密码，确认密码实现  
代码逻辑如下：  
\- 确认学号与原密码对应，否则报错  
\- 输入新密码与确认密码 ，如果相同，则md5加密后放入数据库中  
\- 注意设置输入校验

这里使用对话框实现

## 程序代码 ##

#!/usr/bin/env python
    # -*- coding: utf-8 -*-
    # @Date    : 2018-12-05 21:29:35
    # @Author  : Jimy_Fengqi (jmps515@163.com)
    # @Link    : https://blog.csdn.net/qiqiyingse/
    
    import sys
    from PyQt5.QtWidgets import *
    from PyQt5.QtGui import *
    from PyQt5.QtCore import *
    import qdarkstyle
    import time
    #from PyQt5.QtSql import *
    from db.userInfoManager import UserDbManager
    import hashlib
    import images
    
    class changePasswordDialog(QDialog):
        def __init__(self, parent=None):
            super(changePasswordDialog, self).__init__(parent)
    
            #设置该窗口为一个当以层次的模态窗口，阻塞它的父窗口、祖父窗口和各个兄弟窗口接受输入信息，此时能够在弹出来的对话框中接收输入法信息。
            self.setWindowModality(Qt.WindowModal)              
            self.setWindowTitle("修改密码")
            self.setUpUI()
            self.userdb=UserDbManager()
    
        def setUpUI(self):
            self.resize(300, 280)
            self.layout = QFormLayout()
            self.setLayout(self.layout)
    
            self.titlelabel = QLabel(" 修改密码")
            self.userIDLabel = QLabel("账    号：")
            #self.studentNameLabel=QLabel("姓    名：")
            self.oldPasswordLabel = QLabel("旧 密 码：")
            self.passwordLabel = QLabel("新 密 码：")
            self.confirmPasswordLabel = QLabel("确认密码：")
    
            self.userIDEdit = QLineEdit()
            # self.studentNameEdit=QLineEdit()
            self.oldPasswordEdit = QLineEdit()
            self.passwordEdit = QLineEdit()
            self.confirmPasswordEdit = QLineEdit()
    
            self.changePasswordButton = QPushButton("确认修改")
            self.changePasswordButton.setFixedWidth(140)
            self.changePasswordButton.setFixedHeight(32)
    
            self.layout.addRow("", self.titlelabel)
            self.layout.addRow(self.userIDLabel, self.userIDEdit)
            # self.layout.addRow(self.studentNameLabel,self.studentNameEdit)
            self.layout.addRow(self.oldPasswordLabel, self.oldPasswordEdit)
            self.layout.addRow(self.passwordLabel, self.passwordEdit)
            self.layout.addRow(self.confirmPasswordLabel, self.confirmPasswordEdit)
            self.layout.addRow("", self.changePasswordButton)
    
            font = QFont()
            font.setPixelSize(20)
            self.titlelabel.setFont(font)
    
            font.setPixelSize(16)
            self.userIDLabel.setFont(font)
            self.userIDEdit.setFont(font)
            # self.studentNameLabel.setFont(font)
            # self.studentNameEdit.setFont(font)
            self.oldPasswordLabel.setFont(font)
            self.oldPasswordEdit.setFont(font)
            self.passwordLabel.setFont(font)
            self.passwordEdit.setFont(font)
            self.confirmPasswordLabel.setFont(font)
            self.confirmPasswordEdit.setFont(font)
            self.changePasswordButton.setFont(font)
    
    
            self.titlelabel.setMargin(8)            #控件与窗体的左右边距为8
            self.layout.setVerticalSpacing(10)      #控件与控件的边距为8，Layout拥有得属性
    
            # 设置长度
            self.userIDEdit.setMaxLength(10)
            self.oldPasswordEdit.setMaxLength(16)
            self.passwordEdit.setMaxLength(16)
            self.confirmPasswordEdit.setMaxLength(16)
            # 设置密码掩膜
            # QLineEdit.Password输入字符后就立马显示为星号
            # QLineEdit.PasswordEchoOnEdit为输入时为字符，失去焦点为星号
    
            ##self.oldPasswordEdit.setEchoMode(QLineEdit.Password)
            ##self.passwordEdit.setEchoMode(QLineEdit.Password)
            ##self.confirmPasswordEdit.setEchoMode(QLineEdit.Password)
    
            self.oldPasswordEdit.setEchoMode(QLineEdit.PasswordEchoOnEdit)
            self.passwordEdit.setEchoMode(QLineEdit.PasswordEchoOnEdit)
            self.confirmPasswordEdit.setEchoMode(QLineEdit.PasswordEchoOnEdit)
    
            # 设置校验
            reg = QRegExp("PB[0~9]{8}")
            pValidator = QRegExpValidator(self)
            pValidator.setRegExp(reg)
            self.userIDEdit.setValidator(pValidator)
    
            reg = QRegExp("[a-zA-z0-9]+$")
            pValidator.setRegExp(reg)
            self.oldPasswordEdit.setValidator(pValidator)
            self.passwordEdit.setValidator(pValidator)
            self.confirmPasswordEdit.setValidator(pValidator)
    
            # 设置信号与槽
            self.changePasswordButton.clicked.connect(self.changePasswordButtonClicked)
    
        def changePasswordButtonClicked(self):
            userID = self.userIDEdit.text()
            oldPassword = self.oldPasswordEdit.text()
            password = self.passwordEdit.text()
            confirmPassword = self.confirmPasswordEdit.text()
            if (userID == "" or oldPassword == "" or password == "" or confirmPassword == ""):
                print(QMessageBox.warning(self, "警告", "输入不可为空，请重新输入", QMessageBox.Yes, QMessageBox.Yes))
                return
    
            # 密码与确认密码不同
            if(password!=confirmPassword):
                print(QMessageBox.warning(self,"警告","两次输入密码不同,请确认输入",QMessageBox.Yes,QMessageBox.Yes))
                self.passwordEdit.clear()
                self.confirmPasswordEdit.clear()
                return
       
            userinfo=self.userdb.querybyUserid(userID)
    
            # 如果用户不存在
            if (not userinfo):
                print(QMessageBox.warning(self, "警告", "该用户不存在，请重新输入", QMessageBox.Yes, QMessageBox.Yes))
                self.userIDEdit.clear()
                return
                # 如果密码错误
            hl = hashlib.md5()
            hl.update(oldPassword.encode(encoding='utf-8'))
            md5password = hl.hexdigest()
            if( md5password != userinfo[0][2]): 
                print(QMessageBox.warning(self, "警告", "原密码输入错误,请重新输入", QMessageBox.Yes, QMessageBox.Yes))
                self.oldPasswordEdit.clear()
                return
    
            # 修改密码
            hl = hashlib.md5()
            hl.update(password.encode(encoding='utf-8'))
            newmd5password = hl.hexdigest()
    
            self.userdb.updatePassword(newmd5password,userID)
            QMessageBox.information(self,"提醒","修改密码成功，请登录系统!",QMessageBox.Yes,QMessageBox.Yes)
            self.close()
            return
    
    
    if __name__ == "__main__":
        app = QApplication(sys.argv)
        app.setWindowIcon(QIcon(":/images/MainWindow_1.png"))
        app.setStyleSheet(qdarkstyle.load_stylesheet_pyqt5())
        mainMindow = changePasswordDialog()
        mainMindow.show()
        sys.exit(app.exec_())

## 效果图 ##

![20190306164628159.png][]

[20190306164628159.png]: /images/20220312/f900d784c49f4321bd1f3d6c6a80888f.png