Python面向对象+MySQL数据库+异常+模块实现学生信息管理系统
#准备工作
开发环境：Python3.7
开发工具：pycharm 2019.3
用到的Python模块：pymysql ,hashlib
#程序实现
面向对象+数据库+异常+模块。用户登录实现对学生名片的增删改查显示所有学生信息
#设计数据库
数据库：information
user表：存储用户信息
CREATE TABLE `user` (
`id` int(11) PRIMARY KEY NOT NULAUTO_INCREMENT,
`user_name` varchar(11) UNIQUE,
`passward` varchar(256) DEFAULT NULL);
student_msg:存储学生名片信息
CREATE TABLE `student_msg` (
`id` int(11) PRIMARY KEY NOT NULL AUTO_INCREMENT,
`no` varchar(12) UNIQUE ,
`name` char(10) ,
`sex` char(2) ENUM('男','女') DEFAULT '男',
`phone` varchar(11) ,
`class` varchar(10) ,);
#代码
#模块MySQLHelper将数据库操作封装
import pymysql
class MySQLTool(object):
def __init__(self,host,port,database,user,pwd,charset):
self.host = host
self.port = port
self.database = database
self.user = user
self.pwd = pwd
self.charset = charset
def __connect(self):
#创建连接 建立游标对象
self.conn = None
self.cursor = None
self.conn = pymysql.connect(host = self.host,
port = self.port,
database = self.database,
user = self.user,
password = self.pwd,
charset = self.charset)
self.cursor = self.conn.cursor()
def __close(self):
if self.cursor:
self.cursor.close()
if self.conn:
self.conn.close()
#增删改
def __cud(self,sql,params):
rowcount = 0
try:
self.__connect()
rowcount = self.cursor.execute(sql,params)
self.conn.commit()
self.__close()
except Exception as e:
print(e)
return rowcount
def insert(self,sql,params= []): #插入
return self.__cud(sql,params)
def updata(self,sql,params = []): #更新
return self.__cud(sql, params)
def delete(self,sql,params = []): #删除
return self.__cud(sql, params)
def get_one(self,sql,params = []): #查询
try:
self.__connect()
self.cursor.execute(sql,params)
result = self.cursor.fetchall()
self.__close()
return result
except Exception as e:
print(e)
#模块Domo实现用户登录注册和学生名片的增删改查
from MySQLHelper import MySQLTool
import hashlib
tool = MySQLTool('127.0.0.1',3306,'information','root','123456','utf8')
class Student():
def add_infors(self,no,name,sex,phone,classm):
# 添加学生名片
try:
sql = "insert into student_msg (no,name,sex,phone,class) values (%s,%s,%s,%s,%s)"
lines = tool.insert(sql,[no,name,sex,phone,classm])
assert lines,"添加失败：学号已存在 "
except Exception as e:
print(e)
else:
print("添加成功")
def delete_infors(self,name):
#删除学生名片
sql = "delete from student_msg where name = %s"
lines = tool.delete(sql,[name])
if lines:
print("删除成功")
else:
print('删除失败：学生信息不存在')
def find_infors(self,name):
#查找学生名片
try:
sql = "select * from student_msg where name = %s "
lines = tool.get_one(sql,[name])
assert lines,'学生信息不存在'
except Exception as e:
print(e)
return lines
def modify_infors(self,no1,name1,sex1,phone1,classm):
#修改学生名片
try:
sql = "update student_msg set no = %s,name = %s,sex = %s,phone = %s,class= %s where name =%s"
lines = tool.updata(sql,[no1,name1,sex1,phone1,classm,name1])
assert lines,'修改失败：输入信息超出表字段设定长度'
except Exception as e:
print(e)
else:
print("修改成功")
def show_infors(self):
#显示所有学生名片
sql="select * from student_msg"
lines = tool.get_one(sql)
if lines==0:
print("没有学生名片存在：请添加学生名片")
return lines
class User():
def __init__(self,name,pwd):
self.name = name
self.pwd =pwd
def land(self):
#用户登录
s = hashlib.sha256()
s.update(self.pwd.encode("utf8")) #摘要加密
new_psw = s.hexdigest()
sql = "select * from user where user_name = %s and passward = %s "
lines = tool.get_one(sql,[self.name,new_psw])
if lines:
print("登录成功")
else:
print("登录失败:用户名或密码错误\n请输入正确的用户名和密码")
return lines
def register(self):
#用户注册
s = hashlib.sha256()
s.update(self.pwd.encode("utf8"))#摘要加密
new_psw = s.hexdigest()
try:
sql = "insert into user(user_name,passward) values (%s,%s)"
lines = tool.insert(sql,[self.name,new_psw])
assert lines,"注册失败：用户名已存在"
except Exception as e:
print(e)
else:
print("注册成功")
#模块Test_Damo在控制台输出一二级菜单并实现对学生名片信息的管理
from Damo import Student
from Damo import User
class Menu(object): #菜单类
def one_menu(self):
#显示一级菜单
print(" 学生名片管理系统 ")
print(" 1、登录 2、注册 3、退出 ")
print()
print()
choice1 = int(input("请输入需要进行操作的选项序号："))
return choice1
def two_menu(self):
#显示二级菜单
print(" 学生名片管理系统 ")
print(" 1、添加新名片")
print(" 2、查找已有名片")
print(" 3、更改名片")
print(" 4、删除旧名片")
print(" 5、打印全部名片")
print(" 6、返回一级菜单")
print(" 7、退出")
print()
choice2 = int(input("请输入需要进行操作的选项序号："))
return choice2
class Test_damo(Menu): #操作类
def user_main_la(self):
#用户登录操作
print("用户登录：")
user_name = input("请输入用户名：")
user_pwd = input("请输入用户密码：")
user = User(user_name, user_pwd)
if user.land():
return True #输入用户名和密码正确时返回true
def user_main_re(self):
#用户注册操作
print("用户注册：")
user_name1 = input("请输入用户名：")
user_pwd1 = input("请输入用户密码：")
user = User(user_name1, user_pwd1)
user.register()
def student_main(self):
#学生名片操作
op = self.two_menu()
student = Student()
if op == 1:
no = input("请输入学号：")
name = input("请输入学生姓名:")
sex = input("请输入性别：")
phone = input("请输入电话号码;")
classname = input("请输入班级：")
student.add_infors(no, name, sex, phone, classname)
elif op == 2:
name = input("请输入要查找的学生姓名:")
stu = student.find_infors(name)
if stu != ():
print("编号 学号 姓名 性别 电话号码 班级")
print(stu[0][0], " ", stu[0][1], " ", stu[0][2], " ", stu[0][3], " ", stu[0][4], " ", stu[0][5])
elif op == 3:
name = input("请输入要修改的学生姓名:")
if student.find_infors(name) !=():
no = input("请输入修改学号：")
sex = input("请输入修改性别：")
phone = input("请输入修改电话号码:")
classname = input("请输入修改班级：")
student.modify_infors(no, name, sex, phone, classname)
elif op == 4:
name = input("请输入要删除的学生姓名:")
student.delete_infors(name)
elif op == 5:
stu = student.show_infors()
print("编号 学号 姓名 性别 电话号码 班级")
for i in stu:
print("{} {} {} {} {} {}".format(i[0], i[1], i[2], i[3], i[4], i[5]))
elif op == 6:
return self.main()
elif op == 7:
exit()
def main(self):
while True:
try:
dt =self.one_menu()
except Exception as e:
print("输入错误：请输入选项序号！")
else:
if dt == 1:
if self.user_main_la()==True:
while True:
print()
try:
self.student_main()
except Exception as e:
print("输入错误：请输入选项序号！")
elif dt == 2:
self.user_main_re()
elif dt == 3:
exit()
test = Test_damo()
test.main()
#运行效果