parent
28bfa41367
commit
28c236afd7
@ -0,0 +1,628 @@
|
||||
import sys
|
||||
import sqlite3
|
||||
from PySide6.QtWidgets import QApplication, QMainWindow, QVBoxLayout, QWidget, QLabel, QLineEdit, QPushButton, \
|
||||
QMessageBox
|
||||
from PySide6.QtSql import QSqlDatabase, QSqlQuery
|
||||
from PySide6.QtWidgets import QApplication, QMainWindow, QVBoxLayout, QWidget, QLabel, QLineEdit, QPushButton, \
|
||||
QMessageBox, QPlainTextEdit
|
||||
from PySide6.QtWidgets import QDialog
|
||||
# 创建数据库连接
|
||||
conn = sqlite3.connect('students.db')
|
||||
|
||||
# 创建学生表
|
||||
conn.execute('''CREATE TABLE IF NOT EXISTS students
|
||||
(name TEXT NOT NULL,
|
||||
student_number INTEGER NOT NULL,
|
||||
score INTEGER NOT NULL)''')
|
||||
# 创建用户表
|
||||
conn.execute('''CREATE TABLE IF NOT EXISTS users
|
||||
(id INTEGER PRIMARY KEY AUTOINCREMENT,
|
||||
username TEXT NOT NULL,
|
||||
password TEXT NOT NULL)''')
|
||||
# 创建图书列表表
|
||||
conn.execute('''CREATE TABLE IF NOT EXISTS books
|
||||
(book_id INTEGER PRIMARY KEY,
|
||||
book_name TEXT NOT NULL,
|
||||
book_status TEXT NOT NULL)''')
|
||||
|
||||
|
||||
|
||||
class LoginWindow(QWidget):
|
||||
def __init__(self):
|
||||
super().__init__()
|
||||
|
||||
self.db = QSqlDatabase.addDatabase('QSQLITE')
|
||||
self.db.setDatabaseName('students.db')
|
||||
self.db.open()
|
||||
|
||||
self.createTable()
|
||||
|
||||
self.username = QLineEdit()
|
||||
self.password = QLineEdit()
|
||||
self.password.setEchoMode(QLineEdit.Password)
|
||||
|
||||
login_button = QPushButton('登录')
|
||||
login_button.clicked.connect(self.login)
|
||||
|
||||
register_button = QPushButton('注册')
|
||||
register_button.clicked.connect(self.register)
|
||||
|
||||
layout = QVBoxLayout()
|
||||
layout.addWidget(QLabel("账号:"))
|
||||
layout.addWidget(self.username)
|
||||
layout.addWidget(QLabel("密码:"))
|
||||
layout.addWidget(self.password)
|
||||
layout.addWidget(login_button)
|
||||
layout.addWidget(register_button)
|
||||
self.setLayout(layout)
|
||||
|
||||
def login(self):
|
||||
username = self.username.text()
|
||||
password = self.password.text()
|
||||
|
||||
if not username or not password:
|
||||
QMessageBox.warning(self, '错误', '账号密码不能为空')
|
||||
return
|
||||
|
||||
query = QSqlQuery(self.db)
|
||||
query.exec("SELECT * FROM users WHERE username='%s' AND password='%s'" % (username, password))
|
||||
if query.next():
|
||||
self.hide()
|
||||
is_admin = username == 'van' # 检查是否为管理员
|
||||
self.window = StudentApp(username, is_admin) # 传递用户名和管理员参数
|
||||
self.window.show()
|
||||
else:
|
||||
QMessageBox.warning(self, '错误', '账号或密码错误')
|
||||
self.password.clear()
|
||||
|
||||
def register(self):
|
||||
username = self.username.text()
|
||||
password = self.password.text()
|
||||
|
||||
if not username or not password:
|
||||
QMessageBox.warning(self, '错误', '账号和密码不能为空')
|
||||
return
|
||||
|
||||
query = QSqlQuery(self.db)
|
||||
query.exec(f"SELECT * FROM users WHERE username='{username}'")
|
||||
if query.next():
|
||||
QMessageBox.warning(self, '错误', '该账户已经存在')
|
||||
return
|
||||
|
||||
query.prepare("INSERT INTO users (username, password) VALUES (?, ?)")
|
||||
query.bindValue(0, username)
|
||||
query.bindValue(1, password)
|
||||
if query.exec():
|
||||
QMessageBox.information(self, '成功', '你已成功注册')
|
||||
else:
|
||||
QMessageBox.warning(self, '错误', '注册失败')
|
||||
|
||||
def createTable(self):
|
||||
query = QSqlQuery(self.db)
|
||||
query.exec("CREATE TABLE IF NOT EXISTS users (username varchar(20), password varchar(20))")
|
||||
|
||||
# 添加管理员账号
|
||||
query.exec("SELECT * FROM users WHERE username='van'")
|
||||
if not query.next():
|
||||
query.prepare("INSERT INTO users (username, password) VALUES (?, ?)")
|
||||
query.bindValue(0, 'van')
|
||||
query.bindValue(1, '123456')
|
||||
query.exec()
|
||||
|
||||
|
||||
class StudentApp(QMainWindow):
|
||||
def __init__(self, username, is_admin): # 接收用户名和管理员参数
|
||||
super().__init__()
|
||||
self.username = username # 保存用户名
|
||||
self.is_admin = is_admin # 保存管理员状态
|
||||
self.setWindowTitle(f'学生信息管理 - {username}') # 设置窗口标题为用户名
|
||||
|
||||
central_widget = QWidget()
|
||||
self.setCentralWidget(central_widget)
|
||||
|
||||
layout = QVBoxLayout()
|
||||
welcome_label = QLabel(f'你好，{username}') # 显示欢迎消息
|
||||
layout.addWidget(welcome_label)
|
||||
|
||||
self.name_label = QLabel("姓名:")
|
||||
self.name_edit = QLineEdit()
|
||||
layout.addWidget(self.name_label)
|
||||
layout.addWidget(self.name_edit)
|
||||
|
||||
self.student_number_label = QLabel("学号:")
|
||||
self.student_number_edit = QLineEdit()
|
||||
layout.addWidget(self.student_number_label)
|
||||
layout.addWidget(self.student_number_edit)
|
||||
|
||||
self.score_label = QLabel("成绩:")
|
||||
self.score_edit = QLineEdit()
|
||||
layout.addWidget(self.score_label)
|
||||
layout.addWidget(self.score_edit)
|
||||
|
||||
self.add_student_btn = QPushButton('添加学生信息')
|
||||
self.add_student_btn.clicked.connect(self.add_student)
|
||||
layout.addWidget(self.add_student_btn)
|
||||
|
||||
self.find_student_btn = QPushButton('查找学生信息')
|
||||
self.find_student_btn.clicked.connect(self.find_student)
|
||||
layout.addWidget(self.find_student_btn)
|
||||
|
||||
self.delete_student_btn = QPushButton('删除学生信息')
|
||||
self.delete_student_btn.clicked.connect(self.delete_student)
|
||||
layout.addWidget(self.delete_student_btn)
|
||||
|
||||
self.clear_table_btn = QPushButton('清空表数据')
|
||||
self.clear_table_btn.clicked.connect(self.clear_table)
|
||||
layout.addWidget(self.clear_table_btn)
|
||||
|
||||
self.sort_by_score_btn = QPushButton('按成绩排序')
|
||||
self.sort_by_score_btn.clicked.connect(self.sort_by_score)
|
||||
layout.addWidget(self.sort_by_score_btn)
|
||||
|
||||
self.sort_by_student_number_btn = QPushButton('按学号排序')
|
||||
self.sort_by_student_number_btn.clicked.connect(self.sort_by_student_number)
|
||||
layout.addWidget(self.sort_by_student_number_btn)
|
||||
self.library_system_btn = QPushButton('图书管理系统')
|
||||
self.library_system_btn.clicked.connect(self.open_library_system)
|
||||
layout.addWidget(self.library_system_btn)
|
||||
|
||||
self.output_label = QLabel("操作结果:")
|
||||
self.output_text = QPlainTextEdit()
|
||||
|
||||
self.output_text.setReadOnly(True)
|
||||
layout.addWidget(self.output_label)
|
||||
layout.addWidget(self.output_text)
|
||||
|
||||
self.manage_users_btn = QPushButton('管理登录用户')
|
||||
self.manage_users_btn.clicked.connect(self.manage_users)
|
||||
layout.addWidget(self.manage_users_btn)
|
||||
|
||||
self.change_password_btn = QPushButton('修改密码')
|
||||
self.change_password_btn.clicked.connect(self.change_password)
|
||||
layout.addWidget(self.change_password_btn)
|
||||
|
||||
self.logout_btn = QPushButton('退出')
|
||||
self.logout_btn.clicked.connect(self.logout)
|
||||
layout.addWidget(self.logout_btn)
|
||||
|
||||
central_widget.setLayout(layout)
|
||||
if not is_admin:
|
||||
self.add_student_btn.setEnabled(False)
|
||||
self.delete_student_btn.setEnabled(False)
|
||||
self.clear_table_btn.setEnabled(False)
|
||||
|
||||
self.show()
|
||||
|
||||
def manage_users(self):
|
||||
if self.is_admin:
|
||||
self.manage_users_window = ManageUsersWindow()
|
||||
self.manage_users_window.show()
|
||||
else:
|
||||
QMessageBox.warning(self, '权限错误', '您无权访问')
|
||||
|
||||
def change_password(self):
|
||||
self.change_password_window = ChangePasswordWindow(self.username, self)
|
||||
self.change_password_window.show()
|
||||
|
||||
def open_library_system(self):
|
||||
self.library_system = LibrarySystemWindow(self.username,self.is_admin) # 传递当前登录用户的用户名
|
||||
self.library_system.show()
|
||||
|
||||
def add_student(self):
|
||||
name = self.name_edit.text()
|
||||
student_number = self.student_number_edit.text()
|
||||
score = self.score_edit.text()
|
||||
|
||||
if not name or not student_number or not score:
|
||||
QMessageBox.warning(self, '输入错误', '姓名、学号和成绩不能为空')
|
||||
return
|
||||
|
||||
cursor = conn.execute("SELECT * FROM students WHERE student_number=?", (student_number,))
|
||||
existing_student = cursor.fetchone()
|
||||
if existing_student:
|
||||
self.output_text.setPlainText("已存在该学号的学生信息!")
|
||||
return
|
||||
|
||||
conn.execute("INSERT INTO students (name, student_number, score) VALUES (?, ?, ?)",
|
||||
(name, student_number, score))
|
||||
conn.commit()
|
||||
self.output_text.setPlainText("学生信息已添加成功!")
|
||||
self.clear_inputs()
|
||||
|
||||
def find_student(self):
|
||||
student_number = self.student_number_edit.text()
|
||||
name = self.name_edit.text()
|
||||
if not student_number and not name:
|
||||
QMessageBox.warning(self, '输入错误', '姓名和学号不能同时为空')
|
||||
return
|
||||
cursor = conn.execute("SELECT name, student_number, score FROM students WHERE name=? OR student_number=?",
|
||||
(name, student_number))
|
||||
students = cursor.fetchall()
|
||||
if students:
|
||||
if student_number and name: # 如果姓名和学号都输入了
|
||||
name_matched = False
|
||||
for student in students:
|
||||
if str(student_number) == str(student[1]) and name == student[0]:
|
||||
name_matched = True
|
||||
break
|
||||
if not name_matched:
|
||||
self.output_text.setPlainText("学号与姓名不匹配!")
|
||||
self.name_edit.clear()
|
||||
self.student_number_edit.clear()
|
||||
return
|
||||
self.output_text.setPlainText("学生信息:\n")
|
||||
count = 1
|
||||
for student in students:
|
||||
self.output_text.appendPlainText(f"编号: {count}")
|
||||
self.output_text.appendPlainText("姓名: " + student[0])
|
||||
self.output_text.appendPlainText("学号: " + str(student[1]))
|
||||
self.output_text.appendPlainText("成绩: " + str(student[2]))
|
||||
self.output_text.appendPlainText("------------------")
|
||||
count += 1
|
||||
else:
|
||||
self.output_text.setPlainText("未找到学生信息!")
|
||||
|
||||
self.name_edit.clear()
|
||||
|
||||
def delete_student(self):
|
||||
student_number = self.student_number_edit.text()
|
||||
cursor = conn.execute("SELECT * FROM students WHERE student_number=?", (student_number,))
|
||||
student = cursor.fetchone()
|
||||
if student:
|
||||
conn.execute("DELETE FROM students WHERE student_number=?", (student_number,))
|
||||
conn.commit()
|
||||
self.output_text.setPlainText("学生信息已删除!")
|
||||
self.clear_inputs()
|
||||
else:
|
||||
self.output_text.setPlainText("未找到学生信息!")
|
||||
|
||||
def clear_table(self):
|
||||
conn.execute("DELETE FROM students")
|
||||
conn.commit()
|
||||
self.output_text.setPlainText("表数据已清空!")
|
||||
self.clear_inputs()
|
||||
|
||||
def sort_by_score(self):
|
||||
cursor = conn.execute("SELECT name, student_number, score FROM students ORDER BY score DESC")
|
||||
students = cursor.fetchall()
|
||||
self.display_students(students)
|
||||
|
||||
def sort_by_student_number(self):
|
||||
cursor = conn.execute("SELECT name, student_number, score FROM students ORDER BY student_number ASC")
|
||||
students = cursor.fetchall()
|
||||
self.display_students(students)
|
||||
|
||||
def display_students(self, students):
|
||||
if students:
|
||||
self.output_text.setPlainText("学生信息：\n")
|
||||
count = 1
|
||||
for student in students:
|
||||
self.output_text.appendPlainText(f"编号: {count}")
|
||||
self.output_text.appendPlainText("姓名: " + student[0])
|
||||
self.output_text.appendPlainText("学号: " + str(student[1]))
|
||||
self.output_text.appendPlainText("成绩: " + str(student[2]))
|
||||
self.output_text.appendPlainText("------------------")
|
||||
count += 1
|
||||
else:
|
||||
self.output_text.setPlainText("数据库中没有学生信息！")
|
||||
def clear_inputs(self):
|
||||
self.name_edit.clear()
|
||||
self.student_number_edit.clear()
|
||||
self.score_edit.clear()
|
||||
def logout(self):
|
||||
self.close()
|
||||
login_window.show()
|
||||
|
||||
class ChangePasswordWindow(QDialog):
|
||||
def __init__(self, username, parent=None):
|
||||
super().__init__(parent)
|
||||
self.setWindowTitle("修改密码")
|
||||
self.username = username
|
||||
|
||||
self.old_password_edit = QLineEdit()
|
||||
self.old_password_edit.setEchoMode(QLineEdit.Password)
|
||||
self.new_password_edit = QLineEdit()
|
||||
self.new_password_edit.setEchoMode(QLineEdit.Password)
|
||||
|
||||
save_button = QPushButton("保存")
|
||||
save_button.clicked.connect(self.change_password)
|
||||
|
||||
layout = QVBoxLayout()
|
||||
layout.addWidget(QLabel("旧密码:"))
|
||||
layout.addWidget(self.old_password_edit)
|
||||
layout.addWidget(QLabel("新密码:"))
|
||||
layout.addWidget(self.new_password_edit)
|
||||
layout.addWidget(save_button)
|
||||
self.setLayout(layout)
|
||||
|
||||
def change_password(self):
|
||||
old_password = self.old_password_edit.text()
|
||||
new_password = self.new_password_edit.text()
|
||||
|
||||
query = QSqlQuery()
|
||||
query.exec(f"SELECT * FROM users WHERE username='{self.username}' AND password='{old_password}'")
|
||||
if query.next():
|
||||
query.prepare("UPDATE users SET password=? WHERE username=?")
|
||||
query.bindValue(0, new_password)
|
||||
query.bindValue(1, self.username)
|
||||
if query.exec():
|
||||
QMessageBox.information(self, "成功", "密码修改成功")
|
||||
self.close()
|
||||
else:
|
||||
QMessageBox.warning(self, "失败", "密码修改失败")
|
||||
else:
|
||||
QMessageBox.warning(self, "失败", "旧密码错误")
|
||||
|
||||
class ManageUsersWindow(QDialog):
|
||||
def __init__(self):
|
||||
super().__init__()
|
||||
|
||||
self.setWindowTitle('管理登录用户')
|
||||
self.setMinimumWidth(400)
|
||||
|
||||
self.search_username_edit = QLineEdit()
|
||||
self.search_username_edit.setPlaceholderText('输入用户名')
|
||||
self.search_username_button = QPushButton('搜索')
|
||||
self.search_username_button.clicked.connect(self.search_username)
|
||||
self.delete_user_button = QPushButton('删除该账户')
|
||||
self.delete_user_button.clicked.connect(self.delete_user)
|
||||
self.show_all_users_button = QPushButton('显示所有的用户')
|
||||
self.show_all_users_button.clicked.connect(self.show_all_users)
|
||||
|
||||
|
||||
|
||||
self.output_text = QPlainTextEdit()
|
||||
self.output_text.setReadOnly(True)
|
||||
|
||||
layout = QVBoxLayout()
|
||||
layout.addWidget(QLabel('搜索账号：'))
|
||||
layout.addWidget(self.search_username_edit)
|
||||
layout.addWidget(self.search_username_button)
|
||||
layout.addWidget(self.show_all_users_button)
|
||||
layout.addWidget(self.delete_user_button)
|
||||
layout.addWidget(QLabel('用户列表：'))
|
||||
layout.addWidget(self.output_text)
|
||||
|
||||
|
||||
self.setLayout(layout)
|
||||
|
||||
def search_username(self):
|
||||
username = self.search_username_edit.text()
|
||||
if not username:
|
||||
QMessageBox.warning(self, '错误', '请输入用户名')
|
||||
return
|
||||
|
||||
query = QSqlQuery()
|
||||
query.exec(f"SELECT * FROM users WHERE username='{username}'")
|
||||
if query.next():
|
||||
password = query.value(2)
|
||||
self.output_text.setPlainText(f'用户名: {username}\n密码: {password}')
|
||||
else:
|
||||
self.output_text.setPlainText('未找到该用户')
|
||||
|
||||
def show_all_users(self):
|
||||
query = QSqlQuery()
|
||||
query.exec('SELECT * FROM users')
|
||||
|
||||
users = []
|
||||
while query.next():
|
||||
username = query.value(1)
|
||||
password = query.value(2)
|
||||
users.append(f'用户名: {username}\n密码: {password}\n')
|
||||
users.append('------------------\n')
|
||||
|
||||
if users:
|
||||
self.output_text.setPlainText(''.join(users))
|
||||
else:
|
||||
self.output_text.setPlainText('用户表为空')
|
||||
|
||||
def delete_user(self):
|
||||
username = self.search_username_edit.text()
|
||||
if not username:
|
||||
QMessageBox.warning(self, '错误', '请输入用户名')
|
||||
return
|
||||
|
||||
query = QSqlQuery()
|
||||
query.exec(f"SELECT * FROM users WHERE username='{username}'")
|
||||
if query.next():
|
||||
query.exec(f"DELETE FROM users WHERE username='{username}'")
|
||||
self.output_text.setPlainText(f'已删除账户: {username}')
|
||||
self.search_username_edit.clear()
|
||||
else:
|
||||
self.output_text.setPlainText('未找到该用户')
|
||||
|
||||
|
||||
class LibrarySystemWindow(QMainWindow):
|
||||
def __init__(self, username,is_admin):
|
||||
super().__init__()
|
||||
self.setWindowTitle('图书管理系统')
|
||||
self.username = username # 保存用户名
|
||||
self.is_admin=is_admin
|
||||
|
||||
|
||||
central_widget = QWidget()
|
||||
self.setCentralWidget(central_widget)
|
||||
|
||||
layout = QVBoxLayout()
|
||||
|
||||
self.book_id_label = QLabel("图书编号:")
|
||||
self.book_id_edit = QLineEdit()
|
||||
layout.addWidget(self.book_id_label)
|
||||
layout.addWidget(self.book_id_edit)
|
||||
|
||||
self.book_name_label = QLabel("图书名称:")
|
||||
self.book_name_edit = QLineEdit()
|
||||
layout.addWidget(self.book_name_label)
|
||||
layout.addWidget(self.book_name_edit)
|
||||
|
||||
self.borrow_btn = QPushButton('借出')
|
||||
self.borrow_btn.clicked.connect(self.borrow_book)
|
||||
layout.addWidget(self.borrow_btn)
|
||||
|
||||
self.return_btn = QPushButton('还书')
|
||||
self.return_btn.clicked.connect(self.return_book)
|
||||
layout.addWidget(self.return_btn)
|
||||
|
||||
self.add_book_btn = QPushButton('添加图书')
|
||||
self.add_book_btn.clicked.connect(self.add_book)
|
||||
layout.addWidget(self.add_book_btn)
|
||||
|
||||
self.find_book_btn = QPushButton('查找图书')
|
||||
self.find_book_btn.clicked.connect(self.find_book)
|
||||
layout.addWidget(self.find_book_btn)
|
||||
|
||||
self.delete_book_btn = QPushButton('删除图书')
|
||||
self.delete_book_btn.clicked.connect(self.delete_book)
|
||||
layout.addWidget(self.delete_book_btn)
|
||||
|
||||
self.show_all_books_btn = QPushButton('显示所有图书')
|
||||
self.show_all_books_btn.clicked.connect(self.show_all_books)
|
||||
layout.addWidget(self.show_all_books_btn)
|
||||
|
||||
self.output_label = QLabel("操作结果:")
|
||||
self.output_text = QPlainTextEdit()
|
||||
self.output_text.setFixedSize(400, 300)
|
||||
self.output_text.setReadOnly(True)
|
||||
layout.addWidget(self.output_label)
|
||||
layout.addWidget(self.output_text)
|
||||
|
||||
central_widget.setLayout(layout)
|
||||
|
||||
def open_library_system(self):
|
||||
self.library_system = LibrarySystemWindow(self.username)
|
||||
self.library_system.show()
|
||||
|
||||
def add_book(self):
|
||||
if not self.is_admin:
|
||||
self.output_text.setPlainText("您无权限执行该操作!")
|
||||
return
|
||||
book_id = self.book_id_edit.text()
|
||||
book_name = self.book_name_edit.text()
|
||||
|
||||
cursor = conn.execute("SELECT * FROM books WHERE book_id=?", (book_id,))
|
||||
existing_book = cursor.fetchone()
|
||||
if existing_book:
|
||||
self.output_text.setPlainText("已存在该图书编号的图书!")
|
||||
self.clear_inputs()
|
||||
return
|
||||
|
||||
conn.execute("INSERT INTO books (book_id, book_name, book_status) VALUES (?, ?, '未借出')",
|
||||
(book_id, book_name))
|
||||
conn.commit()
|
||||
self.output_text.setPlainText("图书已成功添加!")
|
||||
self.clear_inputs()
|
||||
|
||||
def borrow_book(self):
|
||||
book_id = self.book_id_edit.text()
|
||||
cursor = conn.execute("SELECT * FROM books WHERE book_id=?", (book_id,))
|
||||
book = cursor.fetchone()
|
||||
if book:
|
||||
book_status = book[2]
|
||||
if "未借出" in book_status:
|
||||
borrower = self.username # 使用登录界面的账号作为借书人
|
||||
updated_status = "已借出 by " + borrower
|
||||
conn.execute("UPDATE books SET book_status=? WHERE book_id=?", (updated_status, book_id))
|
||||
conn.commit()
|
||||
self.output_text.setPlainText("图书已成功借出!")
|
||||
self.clear_inputs()
|
||||
else:
|
||||
self.output_text.setPlainText("图书已借出，无法再次借阅!")
|
||||
self.clear_inputs()
|
||||
else:
|
||||
self.output_text.setPlainText("未找到图书信息!")
|
||||
self.clear_inputs()
|
||||
self.clear_inputs()
|
||||
|
||||
def return_book(self):
|
||||
book_id = self.book_id_edit.text()
|
||||
cursor = conn.execute("SELECT * FROM books WHERE book_id=?", (book_id,))
|
||||
book = cursor.fetchone()
|
||||
if book:
|
||||
if "未借出" in book[2]:
|
||||
self.output_text.setPlainText("您未借阅该图书！")
|
||||
else:
|
||||
borrower = book[2].split("by ")[1] # 获取当前借书人
|
||||
if borrower == self.username: # 判断是否为当前用户借出的书
|
||||
updated_status = "未借出" # 设置为未借出状态
|
||||
conn.execute("UPDATE books SET book_status=? WHERE book_id=?", (updated_status, book_id))
|
||||
conn.commit()
|
||||
self.output_text.setPlainText("图书已成功归还!")
|
||||
self.clear_inputs()
|
||||
else:
|
||||
self.output_text.setPlainText("您无需归还该书!")
|
||||
self.clear_inputs()
|
||||
else:
|
||||
self.output_text.setPlainText("未找到图书信息!")
|
||||
self.clear_inputs()
|
||||
|
||||
def find_book(self):
|
||||
book_id = self.book_id_edit.text()
|
||||
book_name = self.book_name_edit.text()
|
||||
if not book_id and not book_name:
|
||||
QMessageBox.warning(self, '输入错误', '图书编号和图书名称不能同时为空')
|
||||
return
|
||||
cursor = conn.execute("SELECT book_id, book_name, book_status FROM books WHERE book_id=? OR book_name=?",
|
||||
(book_id, book_name))
|
||||
books = cursor.fetchall()
|
||||
if books:
|
||||
if book_id and book_name: # 如果图书编号和图书名称都输入了
|
||||
name_matched = False
|
||||
for book in books:
|
||||
if str(book_id) == str(book[0]) and book_name == book[1]:
|
||||
name_matched = True
|
||||
break
|
||||
if not name_matched:
|
||||
self.output_text.setPlainText("图书名称与编号不匹配!")
|
||||
self.clear_inputs()
|
||||
return
|
||||
self.output_text.setPlainText("图书信息:\n")
|
||||
for book in books:
|
||||
self.output_text.appendPlainText("图书编号: " + str(book[0]))
|
||||
self.output_text.appendPlainText("图书名称: " + book[1])
|
||||
self.output_text.appendPlainText("图书借出情况: " + book[2])
|
||||
self.output_text.appendPlainText("------------------")
|
||||
else:
|
||||
self.output_text.setPlainText("未找到图书信息!")
|
||||
self.clear_inputs()
|
||||
def delete_book(self):
|
||||
if not self.is_admin:
|
||||
self.output_text.setPlainText("您无权限执行该操作!")
|
||||
return
|
||||
book_id = self.book_id_edit.text()
|
||||
cursor = conn.execute("SELECT * FROM books WHERE book_id=?", (book_id,))
|
||||
book = cursor.fetchone()
|
||||
if book:
|
||||
conn.execute("DELETE FROM books WHERE book_id=?", (book_id,))
|
||||
conn.commit()
|
||||
self.output_text.setPlainText("图书已成功删除!")
|
||||
self.clear_inputs()
|
||||
else:
|
||||
self.output_text.setPlainText("未找到图书信息!")
|
||||
|
||||
def show_all_books(self):
|
||||
cursor = conn.execute("SELECT * FROM books")
|
||||
books = cursor.fetchall()
|
||||
if books:
|
||||
self.output_text.setPlainText("所有图书信息:\n")
|
||||
for book in books:
|
||||
self.output_text.appendPlainText("图书编号: " + str(book[0]))
|
||||
self.output_text.appendPlainText("图书名称: " + book[1])
|
||||
self.output_text.appendPlainText("图书借出情况: " + book[2])
|
||||
self.output_text.appendPlainText("-----------------------------")
|
||||
else:
|
||||
self.output_text.setPlainText("图书列表为空!")
|
||||
|
||||
def return_to_student_app(self):
|
||||
self.parent().show()
|
||||
self.close()
|
||||
|
||||
def clear_inputs(self):
|
||||
self.book_id_edit.clear()
|
||||
self.book_name_edit.clear()
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
app = QApplication(sys.argv)
|
||||
login_window = LoginWindow()
|
||||
login_window.show()
|
||||
sys.exit(app.exec())
|
||||
Loading…
Reference in new issue