PyQt5图书管理系统练习（11）修改密码

环境

系统：windows10系统

编辑器：PyCharm

编程语言：python3+pyqt5

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

"""" brief:修改密码 date:2020-10-06 author:chenyijun version: python V3.8.1 pyqt5 V5.14.0 """ import sys from PyQt5.QtWidgets import * from PyQt5.QtGui import * from PyQt5.QtCore import * import qdarkstyle from initDB import UserDbManager import hashlib 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.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.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.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) 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_())

运行结果：

参考：

https://blog.csdn.net/weixin_38312031/article/details/80155716

https://blog.csdn.net/qiqiyingse/article/details/88242172