老师要求用双端链表，感觉是我的败笔
效果：
# !/usr/bin/env python # -*- codeing: utf-8 -*- """ 双链表模块，没啥用，直接用SQL操作更好 """ __author__ = 'bearcarl' __version__= '1.0' """结点类""" class Node(object): def __init__(self, data = []): self.data = data self.pre = None self.next = None class DouLink(object): """初始化双向链表""" def __init__(self): self.head = Node('head') self.length = 1 def add(self, value): p = self.head new = Node(value) while p.next: p = p.next p.next = new new.pre = p self.length += 1 def remove(self, ID): p = self.head while p.next: if p.data[0] == ID: temp = p.pre ans = p.next temp.next = ans ans.pre = temp return p self.length -= 1 else: p = p.next raise AttributeError(u"can't find this element") def release(self): self.head = Node('head') self.length = 1 def find(self, value, key): results = [] p = self.head while p.next: # 检测下类型, 有时候会 int 和 str 比较看不出来 # print(type(key)) # print(type(value)) # print(type(p.data[2])) if key == 0 and str(p.data[0]) == value: results.append(p.data) elif key == 1 and p.data[1] == value: results.append(p.data) elif key == 2 and str(p.data[2]) == value: results.append(p.data) p = p.next print(len(results)) if len(results) > 0: print(results) return results raise AttributeError(u"can't find this element")
# !/usr/bin/env python # -*- codeing: utf-8 -*- """ 数据库连接模块 __init__：初始化连接信息 insert(self, insert_words)：添加字段方法 select(self, select_words)：查找字段方法 update(self, update_words)：更新字段方法 delete(self, delete_words)：删除字段方法 """ __author__ = 'bearcarl' __version__= '1.0' import pymysql class Mysql_conn: def __init__(self): self.db = pymysql.connect("localhost", "root", "xxxxxxxxx", "test1") self.cursor = self.db.cursor() def insert(self, insert_words): try: # 执行sql语句 self.cursor.execute(insert_words) # 提交到数据库执行 self.db.commit() except: # 如果发生错误则回滚 self.db.rollback() def select(self, select_words): try: # 执行SQL语句 self.cursor.execute(select_words) # 获取所有记录列表 results = self.cursor.fetchall() return results except: print("Error: unable to fetch data") def update(self, update_words): try: # 执行SQL语句 self.cursor.execute(update_words) # 提交到数据库执行 self.db.commit() except: # 发生错误时回滚 self.db.rollback() def delete(self, delete_words): try: # 执行SQL语句 self.cursor.execute(delete_words) # 提交修改 self.db.commit() except: # 发生错误时回滚 self.db.rollback() def close_conn(self): self.db.close() # 测试代码 # test1 = mysql_conn() # 查找测试 # sw = "SELECT * FROM employee" # test1.select(sw) # 增添测试 # iw = """INSERT INTO EMPLOYEE(FIRSTNAME, # LASTNAME, AGE, SEX, INCOME) # VALUES ('Mac', 'Mohan', 20, 'M', 2000)""" # test1.insert(iw) # 更新测试 # uw = "UPDATE EMPLOYEE SET AGE = AGE + 1 WHERE SEX = '%s'" % ('man') # test1.update(uw) # 删除测试 # dw = "DELETE FROM EMPLOYEE WHERE AGE = '%d'" % (20) # test1.delete(dw) # test1.close_conn()
# !/usr/bin/env python # -*- codeing: utf-8 -*- """ GUI 模块， 整个系统的核心，在这个模块中调用 dLink 模块和 connect_mysql模块 参考资料： https://www.cnblogs.com/shemingli/p/6354073.html entry https://blog.csdn.net/liuxu0703/article/details/60781107 Tkinter 15种控件简介 https://blog.csdn.net/qq_25600055/article/details/46941895 Grid布局管理器详解 https://www.cnblogs.com/ruo-li-suo-yi/p/7425307.html Listbox https://blog.csdn.net/m0_37264397/article/details/79079259 https://blog.csdn.net/aa1049372051/article/details/51878578 https://blog.csdn.net/jcodeer/article/details/1811310 messagebox http://www.17python.com/blog/25 """ __author__ = 'bearcarl' __version__= '1.0' from tkinter import * from tkinter import ttk from tkinter import messagebox # 导入提示窗口包 from connect_mysql import Mysql_conn from dLink import DouLink, Node # 设置窗口大小 def center_window(root, width, height): screenwidth = root.winfo_screenwidth() screenheight = root.winfo_screenheight() size = '%dx%d+%d+%d' % (width, height, (screenwidth - width) / 2, (screenheight - height) / 2) root.geometry(size) class GUI: """给每个组件都命名是为了以后迭代方便""" def __init__(self, root): # 创建双向链表 self.dl = DouLink() root.title('学员信息管理系统 http://www.bearcarl.top') # 设置窗口大小 center_window(root, 800, 600) root.maxsize(1200, 800) root.minsize(300, 240) root.iconbitmap('1.ico') # 添加学员 upload_label_1 = ttk.Label(root, text='姓名').grid(row=0, column=1) upload_label_2 = ttk.Label(root, text='年龄').grid(row=1, column=1) upload_label_3 = ttk.Label(root, text='电话号码').grid(row=2, column=1) upload_label_4 = ttk.Label(root, text='入学日期').grid(row=3, column=1) upload_label_5 = ttk.Label(root, text='邮箱').grid(row=4, column=1) upload_entry_1 = ttk.Entry(root) upload_entry_2 = ttk.Entry(root) upload_entry_3 = ttk.Entry(root) upload_entry_4 = ttk.Entry(root) upload_entry_5 = ttk.Entry(root) upload_entry_1.grid(row=0, column=2) upload_entry_2.grid(row=1, column=2) upload_entry_3.grid(row=2, column=2) upload_entry_4.grid(row=3, column=2) upload_entry_5.grid(row=4, column=2) upload_button_1 = ttk.Button(root, text="提交信息", command=lambda: upload_event()).grid(row=6, column=2) # 修改信息 update_label_1 = ttk.Label(root, text='需更新学号').grid(row=0, column=3) update_label_2 = ttk.Label(root, text='姓名').grid(row=1, column=3) update_label_3 = ttk.Label(root, text='年龄').grid(row=2, column=3) update_label_4 = ttk.Label(root, text='电话号码').grid(row=3, column=3) update_label_5 = ttk.Label(root, text='入学日期').grid(row=4, column=3) update_label_6 = ttk.Label(root, text='邮箱').grid(row=5, column=3) update_entry_1 = ttk.Entry(root) update_entry_2 = ttk.Entry(root) update_entry_3 = ttk.Entry(root) update_entry_4 = ttk.Entry(root) update_entry_5 = ttk.Entry(root) update_entry_6 = ttk.Entry(root) update_entry_1.grid(row=0, column=4) update_entry_2.grid(row=1, column=4) update_entry_3.grid(row=2, column=4) update_entry_4.grid(row=3, column=4) update_entry_5.grid(row=4, column=4) update_entry_6.grid(row=5, column=4) update_button = ttk.Button(root, text='更新信息',command=lambda: update_event()).grid(row=6, column=4) # 查找学员 search_listbox = Listbox(root, height=3) for item in ['按学号查找', '按姓名查找', '按年龄查找']: search_listbox.insert(END, item) search_listbox.grid(row=0, column=6, rowspan=3) search_label = ttk.Label(root, text='查找参数').grid(row=3, column=5) search_entry = ttk.Entry(root) search_entry.grid(row=3, column=6) search_button = ttk.Button(root, text='查找', command=lambda: search_event()).grid(row=5, column=6) delete_button = ttk.Button(root, text='删除该学员', command=lambda: delete_event()).grid(row=6, column=6) # 排序 sort_button_1 = ttk.Button(root, text='按学号排序', command=lambda: sort_event(1)).grid(row=1, column=7) sort_button_1 = ttk.Button(root, text='按姓名排序', command=lambda: sort_event(2)).grid(row=2, column=7) sort_button_1 = ttk.Button(root, text='按年龄排序', command=lambda: sort_event(3)).grid(row=3, column=7) # 信息提示框 info_label = ttk.Label(root, text="信息展示窗口", background='#66ccff', width=100, anchor='center') \ .grid(row=7, column=0, columnspan=8) # 信息展示 Listbox(root, height=8, width=110).grid(row=8, column=0, columnspan=10) # 选择函数， 直接用SQL进行排序 def sort_event(n): # 连接数据库 conn_1 = Mysql_conn() if n == 1: # 构造查询SQL sw = 'SELECT * FROM STUDENT ORDER BY ID' stu_info = conn_1.select(sw) show_listbox = Listbox(root, height=8, width=110) for row in stu_info: show_listbox.insert(END, row) show_listbox.grid(row=8, column=0, columnspan=10) messagebox.showinfo("排序", "已将学员按学号排序！") elif n == 2: # 构造查询SQL sw = 'SELECT * FROM STUDENT ORDER BY NAME' stu_info = conn_1.select(sw) show_listbox = Listbox(root, height=8, width=110) for row in stu_info: show_listbox.insert(END, row) show_listbox.grid(row=8, column=0, columnspan=10) messagebox.showinfo("排序", "已将学员按姓名排序！") elif n == 3: # 构造查询SQL sw = 'SELECT * FROM STUDENT ORDER BY AGE' stu_info = conn_1.select(sw) show_listbox = Listbox(root, height=8, width=110) for row in stu_info: show_listbox.insert(END, row) show_listbox.grid(row=8, column=0, columnspan=10) messagebox.showinfo("排序", "已将学员按年龄排序！") # 关闭数据库连接 conn_1.close_conn() # 提交学员信息 def upload_event(): i = [] # 连接数据库 conn_1 = Mysql_conn() # root.update() i.append(upload_entry_1.get()) i.append(upload_entry_2.get()) i.append(upload_entry_3.get()) i.append(upload_entry_4.get()) i.append(upload_entry_5.get()) # 清除输入框中的数据 upload_entry_1.delete(0, END) upload_entry_2.delete(0, END) upload_entry_3.delete(0, END) upload_entry_4.delete(0, END) upload_entry_5.delete(0, END) # 构造SQL语句 uw = "INSERT INTO STUDENT (NAME, AGE, TEL_NUMBER, DATE, EMAIL)" \ "VALUES('%s', '%s', '%s', '%s', '%s')" %(i[0], i[1], i[2], i[3], i[4]) conn_1.insert(uw) messagebox.showinfo("保存提示", "已保存学员信息！") # 刷新信息区 sw = 'SELECT * FROM STUDENT ORDER BY ID' stu_info = conn_1.select(sw) show_listbox = Listbox(root, height=8, width=110) for row in stu_info: show_listbox.insert(END, row) show_listbox.grid(row=8, column=0, columnspan=10) # 关闭数据库连接 conn_1.close_conn() # 更新学员信息 def update_event(): i = [] # 连接数据库 conn_1 = Mysql_conn() i.append(update_entry_1.get()) i.append(update_entry_2.get()) i.append(update_entry_3.get()) i.append(update_entry_4.get()) i.append(update_entry_5.get()) i.append(update_entry_6.get()) # 清除输入框中的数据 update_entry_1.delete(0, END) update_entry_2.delete(0, END) update_entry_3.delete(0, END) update_entry_4.delete(0, END) update_entry_5.delete(0, END) update_entry_6.delete(0, END) # 构造SQL语句 uw = "UPDATE STUDENT SET NAME = '%s', AGE = '%s', TEL_NUMBER = '%s', DATE = '%s', EMAIL = '%s' WHERE " \ "ID = '%s'"% (i[1], i[2], i[3], i[4], i[5], i[0]) conn_1.update(uw) messagebox.showinfo("更新提示", "已更新学员信息！") # 刷新信息区 sw = 'SELECT * FROM STUDENT ORDER BY ID' stu_info = conn_1.select(sw) show_listbox = Listbox(root, height=8, width=110) for row in stu_info: show_listbox.insert(END, row) show_listbox.grid(row=8, column=0, columnspan=10) # 关闭数据库连接 conn_1.close_conn() # 保存当前首位符合条件的学员的ID cur_search_id = None def search_event(): # 连接数据库 conn_1 = Mysql_conn() # 构造SQL语句 sw = 'SELECT * FROM STUDENT ORDER BY ID' stu_info = conn_1.select(sw) # 保存当前首位符合条件的学员的ID global cur_search_id cur_search_id = stu_info[0][0] for items in stu_info: node = [] node.append(items[0]) node.append(items[1]) node.append(items[2]) node.append(items[3]) node.append(items[4]) node.append(items[5]) self.dl.add(node) key = search_listbox.curselection() value = search_entry.get() # 删除搜索框中数据 search_entry.delete(0, END) results = self.dl.find(value, key[0]) show_listbox = Listbox(root, height=8, width=110) for row in results: show_listbox.insert(END, row) show_listbox.grid(row=8, column=0, columnspan=10) # 清空链表 self.dl.release() # 关闭数据库连接 conn_1.close_conn() def delete_event(): # 连接数据库 conn_1 = Mysql_conn() global cur_search_id messagebox.showinfo("删除提示", "该学员信息已删除！") # 从数据库中删除该学员，以保持同步 rw = "DELETE FROM STUDENT WHERE ID = '%d'" % (cur_search_id) conn_1.delete(rw) # 将cur_search_id 置为 None，防止误删 cur_search_id = None # 断开数据库 conn_1.close_conn() # 刷新数据显示 Listbox(root, height=8, width=110).grid(row=8, column=0, columnspan=10) root = Tk() test = GUI(root) root.mainloop()