ADD file via upload

sever.js

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