pyqt5多界面切换，关联数据库校验，注册登录修改密码操作练习
import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget, QPushButton, QLabel,QLineEdit
from PyQt5.QtGui import QPalette,QBrush,QPixmap
import pygame
pygame.mixer.init()
import pymysql
class FirstUi(QMainWindow):
"""首先进入界面"""
def __init__(self):
super(FirstUi, self).__init__()
self.init_ui()
def init_ui(self):
self.resize(800, 600)
self.setWindowTitle('登录首页')
pygame.mixer.music.stop()
#界面背景图
palette = QPalette()
palette.setBrush(QPalette.Background, QBrush(QPixmap("./images/登录首页背景.jpg")))
self.setPalette(palette)
# 左侧文字显示
label_bj = 'border-width:2px;border-style:solid;font-size:15px;' \
'border-color:rgb(255,170,0);background-color:rgb(100,149,237);'
label_kd = 250 # 文字框初始宽
label_gd = 350 # 文字框初始高
label_kkd = 120 # 文字框初始宽
label_kgd = 30 # 文字框初始高
self.label = QLabel(self)
self.label.setText("用户名")
self.label.move(label_kd, label_gd)
self.label.setFixedSize(label_kkd, label_kgd)
self.label.setStyleSheet(label_bj)
self.label1 = QLabel(self)
self.label1.setText("密 码")
self.label1.move(label_kd, label_gd + 40)
self.label1.setFixedSize(label_kkd, label_kgd)
self.label1.setStyleSheet(label_bj)
# 信息反馈
self.label2 = QLabel(self)
self.label2.setText("信息反馈")
self.label2.move(label_kd, label_gd + 120)
self.label2.setFixedSize(label_kkd + 230, label_kgd)
self.label2.setStyleSheet(label_bj)
# 按钮 发送邮件
self.button = QPushButton(self)
self.button.setText("注 册")
self.button.move(label_kd, label_gd + 80)
self.button.setFixedSize(label_kkd - 40, label_kgd)
self.button.setStyleSheet(label_bj)
self.button1 = QPushButton(self)
self.button1.setText("登 录")
self.button1.move(label_kd + 90, label_gd + 80)
self.button1.setFixedSize(label_kkd - 40, label_kgd)
self.button1.setStyleSheet(label_bj)
self.button2 = QPushButton(self)
self.button2.setText("忘记密码")
self.button2.move(label_kd + 180, label_gd + 80)
self.button2.setFixedSize(label_kkd - 40, label_kgd)
self.button2.setStyleSheet(label_bj)
self.button3 = QPushButton(self)
self.button3.setText("修改密码")
self.button3.move(label_kd + 270, label_gd + 80)
self.button3.setFixedSize(label_kkd - 40, label_kgd)
self.button3.setStyleSheet(label_bj)
# 按键 注 册 点击触发
self.button.clicked.connect(self.openimage_ze)
# 按键 登 录 点击触发
self.button1.clicked.connect(self.openimage_dl)
# 按键忘记密码点击触发
self.button2.clicked.connect(self.openimage_xg)
# 按键忘记密码点击触发
self.button3.clicked.connect(self.openimage_xgmm)
lineEdit_kd = 380 # 文字框初始宽
lineEdit_gd = 350 # 文字框初始高
lineEdit_kkd = 220 # 文字框初始宽
lineEdit_kgd = 30 # 文字框初始高
# 右侧文字输入栏
lineEdit_bj = 'border-width:2px;border-style:solid;font-size:15px;' \
'border-color:rgb(255,255,0);background-color:rgb(100,170,160);'
self.lineEdit = QLineEdit(self)
self.lineEdit.setText("[email protected]")
self.lineEdit.move(lineEdit_kd, lineEdit_gd)
self.lineEdit.setFixedSize(lineEdit_kkd - 10, lineEdit_kgd)
self.lineEdit.setStyleSheet(lineEdit_bj)
self.lineEdit1 = QLineEdit(self)
self.lineEdit1.setText("szcNSP850219")
self.lineEdit1.move(lineEdit_kd, lineEdit_gd + 40)
self.lineEdit1.setFixedSize(lineEdit_kkd - 10, lineEdit_kgd)
self.lineEdit1.setStyleSheet(lineEdit_bj)
def slot_btn_functiona(self):
self.hide()
self.s = Jie_a_Ui()
self.s.show()
def slot_btn_functionb(self):
self.hide()
self.s = Jie_b_Ui()
self.s.show()
def sjk_lj(self):
# 连接database 数据库
self.conn = pymysql.connect(host='127.0.0.1', port=3306, user='szc', password='szcNSP850219', database='szc_sql',
charset='utf8')
def openimage_ze(self):
"""注 册 按钮 """
# 用户名
self.user = self.lineEdit.text()
# 密码
self.password = self.lineEdit1.text()
#登录数据库
self.sjk_lj()
# 得到一个可以执行SQL语句的光标对象
self.cursor = self.conn.cursor()
#查看用户名是否存在
sql = "SELECT * FROM userinfo where username = '%s'" % self.user
self.count = self.cursor.execute(sql)
if self.count == 1:
self.label2.setText(self.user+"：用户名已存在")
return
else:
sql = "insert into userinfo (username,passwd,createdate,state,statedate) values('%s','%s',now(),'US10',now()) " % (
self.user, self.password)
self.count = self.cursor.execute(sql)
self.conn.commit()
self.label2.setText(self.user+"：恭喜您注册成功")
# 关闭光标对象
self.cursor.close()
# 关闭数据库连接
self.conn.close()
def openimage_dl(self):
"""登 录 按钮 """
# 用户名
self.user = self.lineEdit.text()
# 密码
self.password = self.lineEdit1.text()
# 登录数据库
self.sjk_lj()
# 得到一个可以执行SQL语句的光标对象
self.cursor = self.conn.cursor()
# 查看用户名是否存在
sql = "SELECT * FROM userinfo where username = '%s'" % self.user
self.count = self.cursor.execute(sql)
if self.count == 0:
self.label2.setText(self.user + "：用户名不存在")
else:
sql = "SELECT passwd FROM userinfo where username = '%s'" % self.user
self.cursor.execute(sql)
self.sjk_mm = self.cursor.fetchone()[0] # 获取密码
if self.password == self.sjk_mm:
self.slot_btn_functiona()
else:
self.label2.setText(self.user + "：您输入的密码不符")
# 关闭光标对象
self.cursor.close()
# 关闭数据库连接
self.conn.close()
def openimage_xg(self):
"""忘记密码 按钮 """
# 用户名
self.user = self.lineEdit.text()
# 密码
self.password = self.lineEdit1.text()
# 登录数据库
self.sjk_lj()
# 得到一个可以执行SQL语句的光标对象
self.cursor = self.conn.cursor()
# 查看用户名是否存在
sql = "SELECT * FROM userinfo where username = '%s'" % self.user
self.count = self.cursor.execute(sql)
if self.count == 0:
self.label2.setText(self.user + "：用户名不存在")
else:
sql = "SELECT passwd FROM userinfo where username = '%s'" % self.user
self.cursor.execute(sql)
self.sjk_mm = self.cursor.fetchone()[0] # 获取密码
self.label2.setText(self.user+" 您的密码:" +
self.sjk_mm[0:len(self.sjk_mm)-4] +'**' +
self.sjk_mm[len(self.sjk_mm)-2:len(self.sjk_mm)] )
# 关闭光标对象
self.cursor.close()
# 关闭数据库连接
self.conn.close()
def openimage_xgmm(self):
"""忘记密码 按钮 """
self.slot_btn_functionb()
class Jie_a_Ui(QWidget):
"""二层界面"""
def __init__(self):
super(Jie_a_Ui, self).__init__()
self.init_ui()
def init_ui(self):
self.resize(800, 600)
self.setWindowTitle('登录界面')
# 界面背景图
palette = QPalette()
palette.setBrush(QPalette.Background, QBrush(QPixmap("./images/登录背景.jpg")))
self.setPalette(palette)
#背景音乐
pygame.mixer.music.load('./images/爱笑的眼睛.MP3')
pygame.mixer.music.play()
self.btn = QPushButton('退回首页', self)
self.btn.setGeometry(50, 500, 100, 50)
self.btn.clicked.connect(self.slot_btn_function)
def slot_btn_function(self):
self.hide()
self.f = FirstUi()
self.f.show()
class Jie_b_Ui(QWidget):
"""二层界面"""
def __init__(self):
super(Jie_b_Ui, self).__init__()
self.init_ui()
# 界面背景图
palette = QPalette()
palette.setBrush(QPalette.Background, QBrush(QPixmap("./images/修改密码.jpg")))
self.setPalette(palette)
# 背景音乐
pygame.mixer.music.load('./images/修炼爱情.MP3')
pygame.mixer.music.play()
def init_ui(self):
self.resize(800, 600)
self.setWindowTitle('修改密码')
label_bj = 'border-width:2px;border-style:solid;font-size:15px;' \
'border-color:rgb(255,170,0);background-color:rgb(100,149,237);'
label_kd = 250 # 文字框初始宽
label_gd = 350 # 文字框初始高
label_kkd = 120 # 文字框初始宽
label_kgd = 30 # 文字框初始高
self.label = QLabel(self)
self.label.setText("用户名")
self.label.move(label_kd, label_gd)
self.label.setFixedSize(label_kkd, label_kgd)
self.label.setStyleSheet(label_bj)
self.label1 = QLabel(self)
self.label1.setText("密 码")
self.label1.move(label_kd, label_gd + 40)
self.label1.setFixedSize(label_kkd, label_kgd)
self.label1.setStyleSheet(label_bj)
# 信息反馈
self.label2 = QLabel(self)
self.label2.setText("新密码")
self.label2.move(label_kd, label_gd + 80)
self.label2.setFixedSize(label_kkd , label_kgd)
self.label2.setStyleSheet(label_bj)
# 信息反馈
self.label3 = QLabel(self)
self.label3.setText("信息反馈")
self.label3.move(label_kd, label_gd + 160)
self.label3.setFixedSize(label_kkd + 230, label_kgd)
self.label3.setStyleSheet(label_bj)
# 右侧文字输入栏
lineEdit_bj = 'border-width:2px;border-style:solid;font-size:15px;' \
'border-color:rgb(255,255,0);background-color:rgb(100,170,160);'
lineEdit_kd = 380 # 文字框初始宽
lineEdit_gd = 350 # 文字框初始高
lineEdit_kkd = 220 # 文字框初始宽
lineEdit_kgd = 30 # 文字框初始高
self.lineEdit = QLineEdit(self)
self.lineEdit.setText("[email protected]")
self.lineEdit.move(lineEdit_kd, lineEdit_gd)
self.lineEdit.setFixedSize(lineEdit_kkd - 10, lineEdit_kgd)
self.lineEdit.setStyleSheet(lineEdit_bj)
self.lineEdit1 = QLineEdit(self)
self.lineEdit1.setText("szcNSP850219")
self.lineEdit1.move(lineEdit_kd, lineEdit_gd + 40)
self.lineEdit1.setFixedSize(lineEdit_kkd - 10, lineEdit_kgd)
self.lineEdit1.setStyleSheet(lineEdit_bj)
self.lineEdit2 = QLineEdit(self)
self.lineEdit2.setText("新密码输入框")
self.lineEdit2.move(lineEdit_kd, lineEdit_gd + 80)
self.lineEdit2.setFixedSize(lineEdit_kkd - 10, lineEdit_kgd)
self.lineEdit2.setStyleSheet(lineEdit_bj)
self.button2 = QPushButton(self)
self.button2.setText("修改密码")
self.button2.move(label_kd , label_gd + 120)
self.button2.setFixedSize(label_kkd +50, label_kgd)
self.button2.setStyleSheet(label_bj)
# 按键修改密码点击触发
self.button2.clicked.connect(self.openimage_xg)
self.button3 = QPushButton(self)
self.button3.setText("退回首页")
self.button3.move(label_kd +180, label_gd + 120)
self.button3.setFixedSize(label_kkd +50, label_kgd)
self.button3.setStyleSheet(label_bj)
# 按键修改密码点击触发
self.button3.clicked.connect(self.slot_btn_function)
def sjk_lj(self):
# 连接database 数据库
self.conn = pymysql.connect(host='127.0.0.1', port=3306, user='szc', password='szcNSP850219', database='szc_sql',
charset='utf8')
def openimage_xg(self):
"""修改密码 按钮 """
# 用户名
self.user = self.lineEdit.text()
# 密码
self.password = self.lineEdit1.text()
# 登录数据库
self.sjk_lj()
# 得到一个可以执行SQL语句的光标对象
self.cursor = self.conn.cursor()
self.password_new = self.lineEdit2.text()
# 查看用户名是否存在
sql = "SELECT * FROM userinfo where username = '%s'" % self.user
self.count = self.cursor.execute(sql)
if self.count == 0:
self.label3.setText(self.user + "：用户名不存在")
else:
sql = "SELECT passwd FROM userinfo where username = '%s'" % self.user
self.cursor.execute(sql)
self.sjk_mm = self.cursor.fetchone()[0] # 获取密码
if self.password == self.sjk_mm:
sql = "update userinfo set passwd='%s' where username ='%s' " % (self.password_new, self.user)
self.count = self.cursor.execute(sql)
self.conn.commit()
self.label3.setText(self.user + "：您的密码已修改")
else:
self.label3.setText(self.user + "：您输入的密码不符")
# 关闭光标对象
self.cursor.close()
# 关闭数据库连接
self.conn.close()
def slot_btn_function(self):
self.hide()
self.f = FirstUi()
self.f.show()
def main():
#主界面打开函数
app = QApplication(sys.argv)
w = FirstUi()
w.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
