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60 lines
2.1 KiB
60 lines
2.1 KiB
import json
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import os
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from typing import Dict, Any
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class StudentDataAccess:
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def __init__(self, file_path: str = 'student_data.json'):
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self.file_path = file_path
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def load_data(self) -> Dict[str, Any]:
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"""从文件加载所有学生数据"""
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try:
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if os.path.exists(self.file_path):
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with open(self.file_path, 'r', encoding='utf-8') as f:
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return json.load(f)
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return {}
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except Exception as e:
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raise Exception(f"加载数据时出错: {e}")
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def save_data(self, data: Dict[str, Any]) -> bool:
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"""保存所有学生数据到文件"""
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try:
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with open(self.file_path, 'w', encoding='utf-8') as f:
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json.dump(data, f, ensure_ascii=False, indent=4)
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return True
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except Exception as e:
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raise Exception(f"保存数据时出错: {e}")
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def get_student(self, student_id: str) -> Dict[str, Any]:
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"""根据学号获取单个学生信息"""
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data = self.load_data()
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return data.get(student_id)
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def get_all_students(self) -> Dict[str, Any]:
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"""获取所有学生信息"""
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return self.load_data()
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def add_student(self, student_id: str, student_info: Dict[str, Any]) -> bool:
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"""添加新学生"""
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data = self.load_data()
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if student_id in data:
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raise Exception("该学号已存在！")
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data[student_id] = student_info
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return self.save_data(data)
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def update_student(self, student_id: str, student_info: Dict[str, Any]) -> bool:
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"""更新学生信息"""
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data = self.load_data()
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if student_id not in data:
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raise Exception("该学号不存在！")
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data[student_id] = student_info
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return self.save_data(data)
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def delete_student(self, student_id: str) -> bool:
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"""删除学生"""
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data = self.load_data()
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if student_id not in data:
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raise Exception("该学号不存在！")
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del data[student_id]
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return self.save_data(data) |