用python实现学生管理系统

淡淡的烟草味﹌ 2022-12-21 09:27 180阅读 0赞

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友情链接：[好看站][Link 2] http://www.nrso.net/

**学生管理系统**

相信大家学各种语言的时候，练习总是会写各种管理系统吧，管理系统主要有对数据的增删查改操作，原理不难，适合作为练手的小程序

**数据的结构**

要保存数据就需要数据结构，比如c里面的结构体啊，python里面的列表，字典，还有类都是常用的数据类型  
在这里，我使用了链表来作为学生数据的数据结构,  
即 Node类 和 Student\_LinkList类，来实现链表

**数据的持久化**

我们在程序中产生的数据是保存在内存中的，程序一旦退出，下次就不能恢复此次的数据了，因此需要把内存种的数据，保存到文件或数据库中，存储起来，这个过程就叫数据的持久化

> 本程序使用了python标准库pickle提供的序列化方法dump()和load()来实现数据的持久化

**配置文件**

使用配置文件，可以方便程序中使用不同的子类实现，

> 本程序使用configparser来对配置文件解析  
> 本程序配置文件名为 Student.ini

#Student.ini文件
    [Student]
    student = Student_LinkList

\[Persistence\]  
persistence = Persistence\_Pickle  
file = student.pik

**类之间的关系**

Student \#和学生数据有关的抽象类  
±- Student\_LinkList  
Persistence \#和持久化有关的抽象类  
±- Persistence\_Pickle  
MyConfigure \#和配置文件读取有关的类  
UI \#和交互有关的父类  
±- Cmd\_UI

**界面预览**

![Image 1][]

**源码**

'''
    使用单链表实现的学生管理系统
    '''
    import pickle
    import abc
    import configparser

class Student(abc.ABC):  
‘’’  
抽象学生类  
‘’’  
@abc.abstractmethod  
def add(self):  
‘’’  
增加学生结点  
‘’’  
pass

@abc.abstractmethod  
def ladd(self):  
‘’’  
从左侧增加学生结点  
‘’’  
pass

@abc.abstractmethod  
def delete(self,id\_):  
‘’’  
根据id值来删除一个结点  
‘’’  
pass

@abc.abstractmethod  
def delete\_name(self,name):  
‘’’  
根据姓名来删除一个结点  
‘’’  
pass

@abc.abstractmethod  
def insert(self,idx,val):  
‘’’  
插入到指定的位置  
‘’’  
pass

@abc.abstractmethod  
def show(self):  
‘’’  
显示所有的学生结点  
‘’’  
pass

@abc.abstractmethod  
def search\_id(self):  
‘’’  
根据id查询节点  
‘’’  
pass

@abc.abstractmethod  
def search\_name(self):  
‘’’  
根据name查询节点  
‘’’

@abc.abstractmethod  
def modity\_id(self):  
‘’’  
根据id找到节点，然后修改  
‘’’  
pass

class Node(object):  
‘’’  
学生链表结点  
‘’’  
def **init**(self,id\_: int,name: str,sex: str,age: int,score: int):  
self.id = id\_  
self.name = name  
self.sex = sex  
self.age = age  
self.score = score

self.next = None

def modity(self,id\_,name,sex,age,score):  
‘’’  
修改  
‘’’  
self.id = id\_  
self.name = name  
self.sex = sex  
self.age = age  
self.score = score

def **str**(self):  
‘’’  
用于显示输出  
‘’’  
return f"\[学生:\{self.id:2\}\]–>name:\{self.name:10\}sex:\{self.sex:10\}age:\{self.age:10\}score:\{self.score:^10\}"

class Student\_LinkList(Student):  
‘’’  
学生链表  
‘’’  
def **init**(self):  
self.head = Node(-1,‘head’,’-1’,-1,-1)  
self.length = 0  
self.tail = self.head \#尾部结点用于尾插

def add(self,id\_,name,sex,age,score):  
‘’’  
添加一个学生结点,尾插  
‘’’  
\#print(‘当前tail的值’,self.tail)  
temp = Node(id\_,name,sex,age,score)  
self.tail.next = temp  
self.tail = self.tail.next

self.length += 1  
print(’\[info\]:添加成功’)

def ladd(self,id\_,name,sex,age,score):  
‘’’  
添加一个学生，头插  
‘’’  
temp = Node(id\_,name,sex,age,score)  
temp.next = self.head.next  
self.head.next = temp

if self.tail == self.head:  
self.tail = temp

self.length += 1  
print(’\[info\]:添加成功’)

def delete(self,id\_):  
‘’’  
根据id值来删除一个结点,用迭代实现  
‘’’  
p = self.head  
while p.next != None and p.next.id != id\_:  
p = p.next

if p.next == None:  
print(’\[error\]:找不到id’)  
return -1  
else:  
temp = p.next  
p.next = temp.next  
\#如果删除的是尾结点，还要移动tail  
if temp.next == None:  
self.tail = p  
del temp  
print(’\[info\]:删除成功’)

def delete\_name(self,name):  
‘’’  
根据姓名来删除一个结点，用递归实现  
‘’’  
def \_func(node: Node,name: str):  
‘’’  
递归函数  
‘’’  
\#到了尾巴节点了，还没有找到  
if node.next == None:  
print(’\[info\]:找不到name’)  
return False  
elif node.next.name == name:  
temp = node.next  
node.next = temp.next  
\#如果删除的是尾结点，还要移动tail  
if temp.next == None:  
self.tail = node  
del temp  
print(’\[info\]:删除成功’)  
return True  
else:  
return \_func(node.next,name)

t = self.head  
return \_func(t,name)

def insert(self,idx,id\_,name,sex,age,score):  
‘’’  
在指定位置插入数据  
‘’’  
if idx > self.length or idx == 0:  
print(f’\[error\]:你输入的索引非法(1-\{self.length\})’)  
return 0  
p,cur = self.head,0  
while p != None and cur < idx-1:  
p = p.next

if cur < idx-1:  
return -1  
else:  
temp = Node(id\_,name,sex,age,score)  
temp.next = p.next  
p.next = temp  
return True  
print(’\[info\]:插入成功’)

def search\_id(self,id\_):  
‘’’  
根据id查询节点  
‘’’  
p = self.head  
while p != None and p.id != id\_:  
p = p.next  
if p == None:  
return -1  
else:  
return p

def search\_name(self,name):  
‘’’  
根据name查询节点  
‘’’  
p = self.head

def \_func(node: Node,name: str):  
‘’’  
递归函数  
‘’’  
if node == None:  
return -1  
elif node.name == name:  
return node  
return \_func(node.next,name)

return \_func(p,name)

def modity\_id(self,id0,id\_,name,sex,age,score):  
‘’’  
根据id找到节点，然后修改  
‘’’  
node = self.search\_id(id0)  
if node == -1:  
print(’\[error\]:找不到该id’)  
return -1  
else:  
node.modity(id\_,name,sex,age,score)

def show(self):  
‘’’  
显示所有的学生结点,迭代  
‘’’  
print(f’\\n\{"-"\*25\}以下是系统内数据\{"-"\*25\}’)  
temp = \[\]  
p = self.head  
while p != None:  
temp.append§  
p = p.next  
return temp

class Student\_Array():  
‘’’  
用数组实现学生数据存储  
‘’’  
pass

class Student\_Queue():  
‘’’  
用队列实现  
‘’’  
pass

class Student\_Dict():  
‘’’  
用队列实现  
‘’’  
pass

class Persistence(abc.ABC):  
‘’’  
链表数据的持久化  
‘’’  
@abc.abstractmethod  
def save(self):  
‘’’  
把对象保存  
‘’’  
pass

@abc.abstractmethod  
def load(self):  
‘’’  
加载对象  
‘’’  
pass

class Persistence\_Pickle(Persistence):  
‘’’  
使用pickle来序列化  
‘’’  
def **init**(self,cls: Student,file\_):  
self.filename = file\_  
self.obj = None  
self.cls = cls

def save(self):  
with open(self.filename,‘wb’) as f:  
pickle.dump(self.obj,f)

def load(self):  
try:  
with open(self.filename,‘rb’) as f:  
temp = pickle.load(f)  
except:  
temp = globals()self.cls  
print(‘返回temp:’,type(temp))  
self.obj = temp  
return temp

class Persistence\_File(Persistence):  
‘’’  
使用文件来持久化  
‘’’  
pass

class Persistence\_Mysql(Persistence):  
‘’’  
使用Mysql数据库来持久化  
‘’’  
pass

class Persistence\_Socket(Persistence):  
‘’’  
使用远程套接字持久化  
‘’’  
pass

class MyConfigure(object):  
‘’’  
用来读取配置文件的类  
‘’’  
def **init**(self):  
self.config = configparser.ConfigParser()

def save(self):  
‘’’  
保存配置文件  
‘’’  
with open(‘Student.ini’,‘w’) as f:  
self.config.write(f)

def load(self):  
‘’’  
加载配置文件  
‘’’  
self.config.read(‘Student.ini’)

def get\_student\_class(self):  
‘’’  
获得Student该使用哪个子类  
‘’’  
return self.config\[‘Student’\]\[‘student’\]

def get\_persistence\_class(self):  
‘’’  
获得持久化，该使用那个类，  
如果是Pickle或文件，还有file作为保存的文件名  
‘’’  
temp = \{\}  
temp\[‘persistence’\] = self.config\[‘Persistence’\]\[‘persistence’\]  
if ‘Persistence\_Pickle’ in temp\[‘persistence’\]:  
temp\[‘file’\] = self.config\[‘Persistence’\]\[‘file’\]  
return temp

class UI(object):  
‘’’  
界面交互  
‘’’  
def **init**(self):  
self.config = MyConfigure()  
self.config.load()  
s\_class = self.config.get\_student\_class()  
p\_class = self.config.get\_persistence\_class()

self.persistence = globals()p\_class\[‘persistence’\]  
self.student = self.persistence.load()  
print(‘实例化成功:’,self.student,self.persistence)

def save(self):  
‘’’  
把数据保存  
‘’’  
self.persistence.save()

def quit(self):  
‘’’  
退出:先保存配置，然后退出  
‘’’  
self.config.save()  
self.save()

def \_show(self):  
‘’’  
显示所有学生节点  
‘’’  
return self.student.show()

def \_add(self,direction,\*temp):  
‘’’  
增加学生结点,  
direction 1左添加，2右添加  
‘’’  
if direction == 1:  
self.student.ladd(\*temp)  
elif direction == 2:  
self.student.add(\*temp)

def \_delete(self,attribute: int,val: str):  
‘’’  
删除学生节点  
attribute: 需要根据哪个属性删除，1.id 或 2.name  
‘’’  
if attribute == 1:  
self.student.delete(val)  
elif attribute == 2:  
self.student.delete\_name(val)

def \_insert(self,idx,\*temp):  
‘’’  
把学生节点插入到指定的位置  
‘’’  
self.student.insert(idx,\*temp)

def \_search(self,attribute,val):  
‘’’  
查询  
‘’’  
if attribute == 1:  
return self.student.search\_id(val)  
elif attribute == 2:  
return self.student.search\_name(val)

def *modity(self,attribute,id*,\*temp):  
‘’’  
修改  
‘’’  
if attribute == 1:  
self.student.modity\_id(id\_,\*temp)  
elif attribute == 2:  
print(’\[info\]:因为没实现，所以什么也不做’)  
pass \#根据name修改没有写

class Cmd\_UI(UI):  
‘’’  
命令行的交互界面  
‘’’  
def **init**(self):  
super(Cmd\_UI,self).**init**()

def get\_input\_1\_2(self,info: str):  
‘’’  
获得输入，返回1或者2  
info: 描述输入的信息  
‘’’  
x = None  
while x == None:  
temp = input(info)  
if temp == ‘1’:  
x = 1  
elif temp == ‘2’:  
x = 2  
else:  
print(‘你只能输入1或者2’)  
return x

def get\_input\_arg(self):  
‘’’  
获得用户的输入构造学生节点  
‘’’  
id\_ = input(‘请输入id’)  
name = input(‘请输入姓名’)  
sex = input(‘请输入性别’)  
age = input(‘请输入年龄’)  
score = input(‘请输入成绩’)  
return (id\_,name,sex,age,score)

def delete(self):  
‘’’  
删除节点  
‘’’  
info = ‘你想要根据哪个属性删除节点:1.id 2.name’  
attribute = self.get\_input\_1\_2(info)  
val = input(‘输入你想要删除的值:’)  
self.\_delete(attribute,val)

def show(self):  
‘’’  
显示  
‘’’  
rel = self.\_show()  
for i in rel:  
print(i)

def add(self):  
‘’’  
增加学生结点  
‘’’  
info = ‘你想要插入的位置:1.左边 2.右边’  
direction = self.get\_input\_1\_2(info)  
arg = self.get\_input\_arg()  
self.\_add(direction,\*arg)

def insert(self):  
‘’’  
新学生，插入到指定的位置  
‘’’  
idx = int(input(‘输入要插入的位置’))  
temp = self.get\_input\_arg()  
self.\_insert(idx,\*temp)

def search(self):  
‘’’  
查询学生  
‘’’  
info = ‘你想要根据哪个属性搜索节点:1.id 2.name’  
attribute = self.get\_input\_1\_2(info)  
val = input(‘输入你想要查询的值:’)

print(self.\_search(attribute,val))

def modity(self):  
‘’’  
修改学生信息  
‘’’  
info = ‘你想要根据哪个属性搜索节点:1.id 2.name’  
attribute = self.get\_input\_1\_2(info)  
val\_ = input(‘输入要查询的值:’)  
temp = self.get\_input\_arg()  
self.*modity(attribute,val*,\*temp)

def main(self):  
‘’’  
主流程  
‘’’  
info = ‘’’

--------------------

*kalpa学生管理系统*

*  0.显示数据 \*
 *  1.增加数据 \*
 *  2.删除数据 \*
 *  3.查询数据 \*
 *  4.修改数据 \*
 *  5.保存并退出 \*

--------------------

‘’’  
print(info)  
a = ‘0’  
while a in \[‘0’,‘1’,‘2’,‘3’,‘4’,‘5’\]:  
if a == ‘0’:  
self.show()  
elif a == ‘1’:  
self.add()  
elif a == ‘2’:  
self.delete()  
elif a == ‘3’:  
self.search()  
elif a == ‘4’:  
self.modity()  
elif a == ‘5’:  
self.quit()  
return  
a = input(’>>’)

if **name** == “**main**”:  
ui = Cmd\_UI()  
ui.main()

关于管理系统的更多内容请点击《管理系统专题》进行学习

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