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83 lines
2.7 KiB
83 lines
2.7 KiB
2 months ago
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const express = require('express');
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const mysql = require('mysql2');
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const bodyParser = require('body-parser');
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const cors = require('cors');
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const xlsx = require('xlsx');
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const app = express();
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const port = 3001;
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// 使用 CORS
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app.use(cors());
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// 创建数据库连接池
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const pool = mysql.createPool({
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host: 'localhost',
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user: 'root',
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password: 'mysql123',
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database: 'mysql'
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});
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// 解析 JSON 请求体
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app.use(bodyParser.json());
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// 获取一个随机学生的信息
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app.get('/api/get-random-student', (req, res) => {
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const query = 'SELECT * FROM students ORDER BY RAND() LIMIT 1';
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pool.query(query, (error, results) => {
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if (error) {
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return res.status(500).json({ message: 'Error fetching random student' });
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}
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if (results.length === 0) {
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return res.status(404).json({ error: 'No students found' });
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}
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res.json(results[0]);
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});
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});
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// 为指定的学生添加出勤积分
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app.post('/api/add-attendance-points', (req, res) => {
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const { student_id } = req.body;
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const query = 'UPDATE students SET points = points + 1 WHERE student_id = ?';
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pool.query(query, [student_id], (error, results) => {
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if (error) {
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return res.status(500).json({ message: 'Error adding attendance points' });
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}
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res.json({ message: 'Attendance points added', student_id });
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});
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});
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// 确认并更新学生的答题积分
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app.post('/api/confirm-points', (req, res) => {
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const { student_id, points } = req.body;
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const query = 'UPDATE students SET points = points + ? WHERE student_id = ?';
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pool.query(query, [points, student_id], (error, results) => {
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if (error) {
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return res.status(500).json({ message: 'Error confirming points' });
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}
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res.json({ message: 'Points confirmed and updated', student_id, points });
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});
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});
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// 导出学生数据到Excel文件
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app.get('/api/export-students', (req, res) => {
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const query = 'SELECT * FROM students';
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pool.query(query, (error, results) => {
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if (error) {
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return res.status(500).json({ message: 'Error fetching students' });
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}
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if (results.length === 0) {
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return res.status(404).json({ error: 'No students found' });
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}
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const worksheet = xlsx.utils.json_to_sheet(results);
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const workbook = xlsx.utils.book_new();
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xlsx.utils.book_append_sheet(workbook, worksheet, 'Students');
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res.setHeader('Content-Disposition', 'attachment; filename=students.xlsx');
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res.setHeader('Content-Type', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
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res.end(xlsx.write(workbook, { type: 'buffer' }));
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});
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});
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app.listen(port, () => {
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console.log(`Server is running on http://localhost:${port}`);
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});
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