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# -*- coding: utf-8 -*-
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import json
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import os
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DATA_FILE = 'students.json'
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def load_students():
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"""从文件加载学生数据"""
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if os.path.exists(DATA_FILE):
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with open(DATA_FILE, 'r', encoding='utf-8') as f:
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return json.load(f)
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return []
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def save_students(students):
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"""保存学生数据到文件"""
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with open(DATA_FILE, 'w', encoding='utf-8') as f:
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json.dump(students, f, ensure_ascii=False, indent=2)
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def input_student_info():
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"""输入学生信息并验证"""
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name = input("请输入姓名：").strip()
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while not name:
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print("姓名不能为空！")
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name = input("请输入姓名：").strip()
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gender = input("请输入性别（男/女）：").strip()
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while gender not in ['男', '女']:
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print("性别输入错误，请重新输入！")
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gender = input("请输入性别（男/女）：").strip()
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class_name = input("请输入班级：").strip()
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while not class_name:
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print("班级不能为空！")
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class_name = input("请输入班级：").strip()
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phone = input("请输入电话号码：").strip()
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while not (phone.isdigit() and len(phone) >= 7):
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print("电话号码必须为数字且至少7位！")
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phone = input("请输入电话号码：").strip()
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return {
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'name': name,
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'gender': gender,
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'class': class_name,
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'phone': phone
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}
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def add_student(students):
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"""添加学生"""
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student = input_student_info()
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students.append(student)
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print(f"学生 {student['name']} 添加成功！")
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def delete_student(students):
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"""删除学生"""
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name = input("请输入要删除的学生姓名：").strip()
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found = [s for s in students if s['name'] == name]
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if not found:
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print("未找到该学生！")
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return
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for s in found:
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students.remove(s)
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print(f"已删除 {len(found)} 个名为 {name} 的学生")
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def search_student(students):
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"""查询学生"""
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keyword = input("请输入查询关键字（姓名或班级）：").strip()
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results = []
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for s in students:
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if keyword in s['name'] or keyword in s['class']:
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results.append(s)
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if not results:
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print("未找到匹配的学生！")
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return
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print("\n查询结果：")
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for i, student in enumerate(results, 1):
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print(f"{i}. 姓名：{student['name']}")
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print(f" 性别：{student['gender']}")
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print(f" 班级：{student['class']}")
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print(f" 电话：{student['phone']}\n")
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def show_menu():
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"""显示主菜单"""
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print("\n学生通讯录管理系统")
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print("1. 添加学生")
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print("2. 删除学生")
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print("3. 查询学生")
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print("4. 退出系统")
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def main():
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students = load_students()
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while True:
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show_menu()
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choice = input("请选择操作（1-4）：").strip()
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if choice == '1':
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add_student(students)
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elif choice == '2':
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delete_student(students)
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elif choice == '3':
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search_student(students)
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elif choice == '4':
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save_students(students)
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print("系统已退出，数据已保存！")
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break
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else:
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print("输入无效，请重新输入！")
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if __name__ == '__main__':
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main()
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