Javascript

get_excel.js

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+const express = require('express');
+const multer = require('multer');
+const XLSX = require('xlsx');
+const cors = require('cors');
+const app = express();
+const port = 3000;
+
+
+// 使用 CORS
+app.use(cors());
+
+// 设置 multer 存储配置
+const storage = multer.memoryStorage();
+const upload = multer({
+    storage: storage,
+    limits: { fileSize: 5 * 1024 * 1024 } // 5MB 限制
+});
+
+// 全局变量来存储学生数据 
+
+
+let dataArray = [];
+let filePath = '';
+
+// 处理文件上传的路由
+app.post('/upload', upload.single('file'), (req, res) => {
+    try {
+        const file = req.file;
+        if (!file) {
+            return res.status(400).json({ message: 'No file uploaded.' });
+        }
+
+        // 使用 xlsx 库读取 Excel 文件  
+        const workbook = XLSX.read(file.buffer, { type: 'buffer' });
+        const sheetName = workbook.SheetNames[0];
+        const worksheet = workbook.Sheets[sheetName];
+        const data = XLSX.utils.sheet_to_json(worksheet, { header: 1 });
+
+        // 初始化或更新全局的学生数据数组  
+        dataArray = data.slice(1).map(row => ({
+            studentID: row[0], // 根据列的实际索引进行调整
+            name: row[1],
+            credit: row[2] || null
+        }));
+
+
+
+        // 处理数据（这里只是打印到控制台，你可以保存到数据库等）  
+        console.log(data);
+
+
+        res.json({ message: 'File uploaded and processed successfully!' });
+    } catch (error) {
+        console.error('Error processing file:', error);
+        res.status(500).json({ message: 'Error processing file: ' + error.message });
+    }
+});
+
+
+
+
+// 新的API端点来返回随机学生数据  
+app.get('/api/get-random-student', (_, res) => {
+    if (dataArray.length === 0) {
+        return res.status(404).json({ error: 'No students found.' });
+    }
+    const randomIndex = Math.floor(Math.random() * dataArray.length);
+    const randomStudent = dataArray[randomIndex];
+    console.log('dataArray:', dataArray);
+    res.json(randomStudent);
+});
+
+// 新的API端点来增加学生的credit
+app.post('/api/add-credit', express.json(), (req, res) => {
+    const { name, studentID } = req.body;
+    const student = dataArray.find(s => s.name === name && s.studentID === studentID);
+    if (!student) {
+        return res.status(404).json({ error: 'Student not found.' });
+    }
+    student.credit += 1;
+    console.log('Updated dataArray:', dataArray);
+    res.json({ message: 'Credit added successfully!' });
+
+});
+
+
+app.post('/api/credit', express.json(), (req, res) => {
+    const { name, studentID, creditToAdd } = req.body;
+    const student = dataArray.find(s => s.name === name && s.studentID === studentID);
+    if (!student) {
+        res.status(404).json({ message: 'Student not found!' });
+        return;
+    }
+    student.credit += parseInt(creditToAdd);
+    console.log('Updated dataArray:', dataArray);
+    res.json({ message: 'Credit added successfully!' });
+
+    // 创建一个新的工作簿
+    const workbook = XLSX.utils.book_new();
+    const worksheet = XLSX.utils.json_to_sheet(dataArray);
+
+    // 将工作表添加到工作簿
+    XLSX.utils.book_append_sheet(workbook, worksheet, 'Sheet1');
+
+    // 保存工作簿为 Excel 文件
+    const excelFilePath = 'C:/Users/Lenovo/Downloads/软工学生名单.xlsx';
+    XLSX.writeFile(workbook, excelFilePath);
+
+});
+
+
+
+
+
+
+app.listen(port, () => {
+    console.log(`Server is running on http://localhost:${port}`);
+});
+
+