基于python与mysql交互的学生管理系统
"""
名片管理系统：
- 需要完成的基本功能：
1. 添加名片
2. 删除名片
3. 修改名片
4. 查询名片
5. 退出系统
- 程序运行后，除非选择退出系统，否则重复执行功能
"""
#************************************************************************************************************
import pymysql
#函数定义
#************************************************************
#二选一选择界面函数
def func_judge2(strr):
print("=" * 30)
str1 = "名片"+strr
print(str1.center(20))
print("1.继续"+strr)
print("2.返回主菜单")
print("=" * 30)
#************************************************************
#三选一选择界面函数
def func_judge3(strr):
print("=" * 30)
str1 = "名片"+strr
print(str1.center(20))
print("1.确认"+strr)
print("2.重新输入")
print("3.返回主菜单")
print("=" * 30)
#************************************************************
#n选项选择防用户输入错误导致报错的 操作输入函数
def num_judge1(n):
str1 = "1"
for i in range(n):
str1 = str1 + str(i + 1)
while True:
judge1 = input("请输入要执行操作：")
if (judge1 in str1) and (len(judge1) == 1):
return judge1
break
else:
print("操作有误，请重新选择：")
#************************************************************
#登录函数
def denglu():
flag = 1
sql_select = "select name,pwd from teacher;"
name = input("请输入用户名：")
pwd = input("请输入密码：")
try:
cur.execute(sql_select)
T = cur.fetchall()
j = 0
L_name = []
for i in T:
L_name.append(i[0])
if name in L_name:
for i in T:
# print("用户名是：%s,密码是:%s"%(i[0],i[1]))
if name == i[0]:
if i[1] == pwd:
print("登录成功！")
flag = 0
break
else:
print("密码输入错误！")
break
else:
print("用户不存在！请注册！")
except Exception as e:
print("操作有误，请稍后再试！")
return flag
#************************************************************
#注册函数
def zhuce():
aql_insert = "insert into teacher(name,pwd) VALUES(%s,%s)"
name = input("请输入需要注册的昵称：")
pwd = input("请输入密码：")
pwd1 = input("请再次输入密码：")
if pwd == pwd1:
try:
cur.execute(aql_insert,[name,pwd])
conn.commit()
print("注册成功!")
except Exception as e:
conn.rollback()
print("用户已存在，请重新输入！")
else:
print("两次密码输入错误！")
#************************************************************
#查询函数
def chaxun(by,strr,str1):
success = 0
if by == "ID":
sql_select = "select * from student where ID = %s;"
elif by == "name":
sql_select = "select * from student where name = %s;"
elif by == "class1":
sql_select = "select * from student where class1 = %s;"
elif by == "xingshi":
sql_select ="select * from student where name like %s;"
try:
cur.execute(sql_select,[strr])
L = cur.fetchall()
if L != ():
success = 1
print("你要%s的学生名片信息为："%str1)
print("+"+("-"*15 + "+")*3)
print("|" + " " * 5 + "name" + " " * 6 + "|" + " " * 6 + "ID" + " " * 7 + "|" + " " * 4 + "class1" + " " * 5 + "|")
for i in range(len(L)):
print("|",end = "")
for j in range(3):
x = 15 - len(L[i][j])
x1 = x // 2
x2 = x - x1
print(" " * x1 + L[i][j] + " " * x2 + "|", end="")
print()
print("+"+("-" * 15 + "+") * 3)
else:
print("该学生不存在！")
except Exception as e:
conn.rollback()
print("数据调取失败，请稍后再试！")
return success
#************************************************************
#删除函数
def shanchu(id):
sql_delete = "delete from student where ID = %s;"
try:
cur.execute(sql_delete,[id])
conn.commit()
except Exception as e:
conn.rollback()
print("数据删改失败，请稍后再试！")
#************************************************************************************************************
#系统准备与介绍
print("*"*40)
print("该系统为测试系统".center(30))
print("初始用户名：zs")
print("初始用户密码：123")
print("运行前请确保有数据库：python")
print("首次使用将会自动建立:teacher 与 student表")
print("*"*40)
#************************************************************************************************************
tea = 0
stu = 0
conn = pymysql.connect(host="localhost",
user="root",
passwd="123456",
port=3306,
db="python",
charset="utf8")
cur = conn.cursor()
try:
sql_select = "create table teacher(" \
"name varchar(50) primary key," \
"pwd varchar(50)" \
")CHARACTER set utf8;"
cur.execute(sql_select)
print("teacher表创建成功！")
# ************************************************************
# 用来存储用户信息：1.用户名 2.密码 并将信息存入数据库中
dic = {
"name": "zs", "pwd": "123"}
str1 = dic['name']
str2 = dic['pwd']
sql_insert = "insert into teacher VALUE (%s,%s);"
cur.execute(sql_insert, [str1, str2])
tea = 1
except Exception as e:
pass
conn.commit()
cur.close()
conn.close()
#************************************************************************************************************
conn = pymysql.connect(host="localhost",
user="root",
passwd="123456",
port=3306,
db="python",
charset="utf8")
cur = conn.cursor()
try:
sql_select = "create table student(" \
"name varchar(50)," \
"ID varchar(50) primary key," \
"class1 varchar(50)" \
")character set utf8;"
cur.execute(sql_select)
print("student表创建成功！")
# ************************************************************
# 学生信息 并将学生信息存入数据库中
card_list = [{
'name': 'zs', 'ID': '001', 'class1': '1701'}, {
'name': 'ls', 'ID': '002', 'class1': '1701'},{
'name': 'ww', 'ID': '003', 'class1': '1701'}]
for i in range(3):
str1 = card_list[i]['name']
str2 = card_list[i]['ID']
str3 = card_list[i]['class1']
sql_insert = "insert into student VALUE (%s,%s,%s);"
cur.execute(sql_insert, [str1, str2, str3])
tea = 1
except Exception as e:
pass
conn.commit()
cur.close()
conn.close()
if tea == 1 or stu == 1:
print("欢迎首次使用名片管理系统V8.0 !")
#************************************************************************************************************
#设定用户是否成功登录的标志
flag = 1
#登录界面
while flag:
# 登录界面
print("=" * 40)
print("名片管理系统 V8.0".center(30))
print("1.登录")
print("2.注册")
print("=" * 40)
caozuo = input("请输入要执行的操作：")
# ************************************************************************************************************
#登录操作
if caozuo == "1":
conn = pymysql.connect(host="localhost",
user="root",
passwd="123456",
port=3306,
db="python",
charset="utf8")
cur = conn.cursor()
# *********************************************************
flag = denglu()
# **********************************************************
cur.close()
conn.close()
#************************************************************************************************************
#注册操作
elif caozuo == '2':
conn = pymysql.connect(host="localhost",
user="root",
passwd="123456",
port=3306,
db="python",
charset="utf8")
cur = conn.cursor()
# *********************************************************
zhuce()
# **********************************************************
cur.close()
conn.close()
#************************************************************************************************************
# 登录之后的界面
while True:
print("="*40)
print("名片管理系统 V1.0".center(30))
print("1.添加名片")
print("2.删除名片")
print("3.修改名片")
print("4.查询名片")
print("5.退出")
print("="*40)
caozuo = input("请输入要执行的操作：")
# ************************************************************************************************************
#这是添加操作
if caozuo == "1":
judge1 = "1"
while judge1 == "1":
ID = input("请输入学号：")
name = input("请输入姓名：")
class1 = input("请输入班级：")
# *********************************************************
conn = pymysql.connect(host="localhost",
user="root",
passwd="123456",
port=3306,
db="python",
charset="utf8")
cur = conn.cursor()
# ******************
aql_insert = "insert into student(name,ID,class1) VALUES(%s,%s,%s)"
try:
cur.execute(aql_insert, [name,ID,class1])
conn.commit()
print("添加成功！")
except Exception as e:
conn.rollback()
print("录入失败！该学生ID已存在！")
# ******************
cur.close()
conn.close()
# **********************************************************
func_judge2("输入")
judge1 = num_judge1(2)
# ************************************************************************************************************
#删除操作
elif caozuo == "2":
while True:
id = input("请输入要删除学生名片的学号:")
judge5 = "4"
judge4 = "1" # 1继续执行
# *********************************************************
conn = pymysql.connect(host="localhost",
user="root",
passwd="123456",
port=3306,
db="python",
charset="utf8")
cur = conn.cursor()
# ******************
success = chaxun("ID",id,"删除") #先查询
# ******************
cur.close()
conn.close()
# **********************************************************
if success == 1:
func_judge3("删除")
judge5 = num_judge1(3)
else:
func_judge2("删除")
judge4 = num_judge1(2)
if judge5 == "1":
# *********************************************************
conn = pymysql.connect(host="localhost",
user="root",
passwd="123456",
port=3306,
db="python",
charset="utf8")
cur = conn.cursor()
# ******************
shanchu(id) #后删除
# ******************
cur.close()
conn.close()
# **********************************************************
print("学生信息删除成功!")
func_judge2("删除")
judge4 = num_judge1(2)
elif judge5 == "3":
break
if judge4 == "2":
break
# ************************************************************************************************************
#修改操作
elif caozuo == "3":
while True:
id = input("请输入要修改学生名片的学号:")
judge5 = "4"
judge4 = "1" # 1继续执行
# *********************************************************
conn = pymysql.connect(host="localhost",
user="root",
passwd="123456",
port=3306,
db="python",
charset="utf8")
cur = conn.cursor()
# ******************
success = chaxun("ID",id,"修改") #先查询
# ******************
cur.close()
conn.close()
# **********************************************************
if success == 1:
func_judge3("修改")
judge5 = num_judge1(3)
else:
func_judge2("修改")
judge4 = num_judge1(2)
if judge5 == "1":
name = input("请输入姓名：")
class1 = input("请输入班级：")
# *********************************************************
conn = pymysql.connect(host="localhost",
user="root",
passwd="123456",
port=3306,
db="python",
charset="utf8")
cur = conn.cursor()
# ******************
#后修改
sql_update = "update student set name = %s,class1 = %s where ID = %s;"
cur.execute(sql_update, [name,class1,id])
conn.commit()
# ******************
cur.close()
conn.close()
# **********************************************************
print("学生信息修改成功!")
func_judge2("修改")
judge4 = num_judge1(2)
elif judge5 == "3":
break
if judge4 == "2":
break
# ************************************************************************************************************
#查询操作
elif caozuo == "4":
judge7 = "1"
while judge7 == "1":
judge10 = 1
print("=" * 30)
print("名片查询".center(20))
print("1.学生信息一览")
print("2.按姓名查询")
print("3.按学号查询")
print("4.按班级查询")
print("5.按姓氏查询")
print("6.返回主菜单")
print("=" * 30)
caozuo1 = input("请输入你要执行的操作：")
# *********************************************************
conn = pymysql.connect(host="localhost",
user="root",
passwd="123456",
port=3306,
db="python",
charset="utf8")
cur = conn.cursor()
# ******************
if caozuo1 == "1":
sql_select = "select * from student;"
cur.execute(sql_select)
L = cur.fetchall()
print("+"+("-" * 15 + "+") * 3)
print("|"+" "*5+"name"+" "*6+"|"+" "*6+"ID"+" "*7+"|"+" "*4+"class1"+" "*5+"|")
for i in range(len(L)):
print("|", end="")
for j in range(3):
x = 15 - len(L[i][j])
x1 = x//2
x2 = x - x1
print(" "*x1+L[i][j]+" "*x2+"|",end = "")
print()
print("+"+("-" * 15 + "+") * 3)
elif caozuo1 == "2":
name = input("请输入查询学生姓名：")
success = chaxun("name", name, "查询")
elif caozuo1 == "3":
ID = input("请输入查询学生学号：")
success = chaxun("ID", ID, "查询")
elif caozuo1 == "4":
class1 = input("请输入查询学生班级：")
success = chaxun("class1", class1, "查询")
elif caozuo1 == "5":
xingshi = input("请输入学生的姓氏：")
success = chaxun("xingshi", xingshi+"%", "查询")
elif caozuo1 == "6":
break
else:
print("请输入正确操作！")
# ******************
cur.close()
conn.close()
# **********************************************************
func_judge2("查询")
judge7 = num_judge1(2)
# ************************************************************************************************************
elif caozuo == "5":
print("谢谢使用，已成功退出！")
break
else:
print("操作指令有误，请重新输入！")