diff --git a/学生管理系统.py b/学生管理系统.py
new file mode 100644
index 0000000..09727a1
--- /dev/null
+++ b/学生管理系统.py
@@ -0,0 +1,607 @@
+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:
+            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:
+            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())
\ No newline at end of file