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const express = require('express');
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const app = express();
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const mongoose = require('mongoose');
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const xlsx = require('xlsx');
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const fs = require('fs');
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// 连接MongoDB数据库
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mongoose.connect('mongodb://localhost:27017/school', { useNewUrlParser: true, useUnifiedTopology: true });
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const db = mongoose.connection;
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db.on('error', console.error.bind(console, 'connection error:'));
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db.once('open', function() {
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console.log('Connected to the database');
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// 读取并解析Excel文件
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const workbook = xlsx.readFile('students.xlsx');
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const sheetName = workbook.SheetNames[0]; // 假设只处理第一个工作表
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const worksheet = workbook.Sheets[sheetName];
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const studentsData = xlsx.utils.sheet_to_json(worksheet, { header: 1 }); // 将工作表转换为JSON数组，第一行是标题
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// 创建一个临时数组来存储要保存的学生对象
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const studentsToSave = [];
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// 遍历数据并创建学生对象
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studentsData.forEach((student, index) => {
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if (index === 0) return; // 跳过标题行
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studentsToSave.push(new Student({
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name: student.name,
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id: student.id,
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// points字段可以从Excel中读取，如果存在的话，否则使用默认值0
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points: student.points ? Number(student.points) : 0
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}));
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});
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// 保存学生数据到数据库
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Student.insertMany(studentsToSave, (err) => {
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if (err) return console.error('Error saving students to the database:', err);
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console.log('Students successfully saved to the database');
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});
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});
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// 定义Student模型
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const studentSchema = new mongoose.Schema({
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name: String,
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id: String,
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points: { type: Number, default: 0 }
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});
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const Student = mongoose.model('Student', studentSchema);
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// 创建API端点来提供学生数据
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app.get('/api/students', async (req, res) => {
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try {
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const students = await Student.find();
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res.json(students);
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} catch (err) {
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res.status(500).json({ error: 'Failed to fetch students' });
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}
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});
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// 启动服务器
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const PORT = process.env.PORT || 3000;
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app.listen(PORT, () => {
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console.log(`Server is running on port ${PORT}`);
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}); |
