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前端 ... main

Author SHA1 Message Date
luoyonghuang d290f6744e Delete '前端'
2 months ago
luoyonghuang 82aa9e4ed3 ADD file via upload
2 months ago
luoyonghuang 971a2fcd0d Update README.md
2 months ago
luoyonghuang f4d5f0b802 Update README.md
2 months ago
luoyonghuang 095fe641df Update README.md
2 months ago
luoyonghuang 028c57a3f8 Update classManager.js
2 months ago
luoyonghuang 32e96d8b03 ADD file via upload
2 months ago
luoyonghuang 1c143b8e77 ADD file via upload
2 months ago
luoyonghuang 285bcf0f92 Update select.html
2 months ago
luoyonghuang 1fa4bf0c55 Update score_display.html
2 months ago
luoyonghuang a4cf04db29 Update scoreManager.js
2 months ago
luoyonghuang acb2e42f98 Update router.js
2 months ago
luoyonghuang 634077c7e9 Update ranking.js
2 months ago
luoyonghuang 2b465511d1 Update lottery.html
2 months ago
luoyonghuang d9960ef64c Update index.html
2 months ago
luoyonghuang 9a54ab08f0 Update dianming.html
2 months ago
luoyonghuang a10f391f85 Update choice.html
2 months ago
luoyonghuang 06e46f5383 Update answer.html
2 months ago
luoyonghuang f940e22722 Delete '111'
2 months ago
luoyonghuang 526bc16392 Delete 'services'
2 months ago
luoyonghuang 1b397ecc5e ADD file via upload
2 months ago
luoyonghuang a53a54d811 Delete 'pu'
2 months ago
luoyonghuang f6656d94d3 ADD file via upload
2 months ago
luoyonghuang fcc3bda958 Update randomSelect.js
2 months ago
pg7s85mrc 873b9a982d Merge pull request '合并' (#1) from 123 into main
2 months ago
luoyonghuang a1365dd77f Update db.js
2 months ago
luoyonghuang 77f39dc63d Update classManager.js
2 months ago
luoyonghuang d272070c75 Delete 'app.js'
2 months ago
luoyonghuang 979aab6fc1 ADD file via upload
2 months ago
luoyonghuang b3f4447d5c ADD file via upload
2 months ago
luoyonghuang 05932c3195 ADD file via upload
2 months ago
luoyonghuang 16a1e5ca41 ADD file via upload
2 months ago
luoyonghuang 6b67287b04 ADD file via upload
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luoyonghuang c136816000 ADD file via upload
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luoyonghuang 8d1ddb46c4 ADD file via upload
2 months ago
luoyonghuang 5adf8cf862 ADD file via upload
2 months ago

@ -1,2 +1,3 @@
# select_random ###html属于前端部分
###js属于后端部分

@ -47,40 +47,153 @@
<body> <body>
<div class="container"> <div class="container">
<div id="question">你需要回答问题 结果是:</div> <div id="question">请重复问题,选择正确或错误:</div>
<button id="correctButton">正确</button> <button id="repeatCorrectButton">准确重复</button>
<button id="wrongButton">错误</button> <button id="repeatWrongButton">未准确重复</button>
<div id="questionResult"></div> <!-- 显示重复问题的结果 -->
<div id="answerContainer" style="display:none;">
<p>现在回答问题:</p>
<button id="correctButton">回答正确</button>
<button id="partiallyCorrectButton">部分正确</button>
<button id="wrongButton">回答错误</button>
</div>
<button class="back-button" onclick="window.location.href='select.html'">返回点名页面</button> <button class="back-button" onclick="window.location.href='select.html'">返回点名页面</button>
<div id="result"></div> <div id="result"></div>
<div id="studentInfo"></div> <!-- 显示学生信息 -->
</div> </div>
<script> <script>
async function updateScore(student_id, points) {
try {
const response = await fetch('/api/update-score', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify({ student_id, points }),
});
if (!response.ok) {
throw new Error('网络响应不正常');
}
const data = await response.text(); // 使用 text() 解析纯数字响应
console.log('更新后的分数:', data); // data 是字符串形式的分数
return data; // 返回更新后的分数字符串
} catch (error) {
console.error('分数更新失败:', error);
return null;
}
}
const urlParams = new URLSearchParams(window.location.search); const urlParams = new URLSearchParams(window.location.search);
const name = urlParams.get('name'); const student_name = urlParams.get('student_name');
const student_id = urlParams.get('student_id');
const repeatCorrectButton = document.querySelector('#repeatCorrectButton');
const repeatWrongButton = document.querySelector('#repeatWrongButton');
const questionResultDisplay = document.querySelector('#questionResult');
const correctButton = document.querySelector('#correctButton'); const correctButton = document.querySelector('#correctButton');
const partiallyCorrectButton = document.querySelector('#partiallyCorrectButton');
const wrongButton = document.querySelector('#wrongButton'); const wrongButton = document.querySelector('#wrongButton');
const resultDisplay = document.querySelector('#result'); const resultDisplay = document.querySelector('#result');
const answerContainer = document.querySelector('#answerContainer');
const studentInfoDisplay = document.querySelector('#studentInfo');
// 初始化积分 // 显示学生姓名和学号
let userPoints = parseInt(localStorage.getItem(name)); studentInfoDisplay.textContent = `学生: ${student_name} 学号: ${student_id}`;
// 正确答案处理 // 正确重复问题处理 +0.5
repeatCorrectButton.addEventListener('click', () => {
updateScore(student_id, 0.5)
.then(newscore => {
if (newscore !== null) {
questionResultDisplay.textContent = `重复正确!${student_id} 的当前积分: ${newscore}`; // 直接使用字符串
answerContainer.style.display = 'block'; // 显示回答问题部分
} else {
console.error('更新分数失败');
questionResultDisplay.textContent = `更新分数失败,请重试。`;
}
})
.catch(error => {
console.error('请求失败:', error);
questionResultDisplay.textContent = `更新分数失败,请重试。`;
});
});
// 未准确重复问题处理 -1
repeatWrongButton.addEventListener('click', () => {
updateScore(student_id, -1)
.then(newscore => {
if (newscore !== null) {
questionResultDisplay.textContent = `重复错误!${student_id} 的当前积分: ${newscore}`; // 直接使用字符串
answerContainer.style.display = 'block'; // 显示回答问题部分
} else {
console.error('更新分数失败');
questionResultDisplay.textContent = `更新分数失败,请重试。`;
}
})
.catch(error => {
console.error('请求失败:', error);
questionResultDisplay.textContent = `更新分数失败,请重试。`;
});
});
// 回答问题的处理
correctButton.addEventListener('click', () => { correctButton.addEventListener('click', () => {
userPoints += 10; // 正确回答加 10 分 updateScore(student_id, 3)
localStorage.setItem(name, userPoints); // 保存更新后的积分 .then(newscore => {
resultDisplay.textContent = `正确!${name} 的当前积分: ${userPoints}`; if (newscore !== null) {
resultDisplay.textContent = `回答完全正确!${student_id} 的当前积分: ${newscore}`; // 直接使用字符串
} else {
console.error('更新分数失败');
resultDisplay.textContent = `更新分数失败,请重试。`;
}
})
.catch(error => {
console.error('请求失败:', error);
resultDisplay.textContent = `更新分数失败,请重试。`;
});
});
partiallyCorrectButton.addEventListener('click', () => {
updateScore(student_id, 1.5)
.then(newscore => {
if (newscore !== null) {
resultDisplay.textContent = `回答部分正确!${student_id} 的当前积分: ${newscore}`; // 直接使用字符串
} else {
console.error('更新分数失败');
resultDisplay.textContent = `更新分数失败,请重试。`;
}
})
.catch(error => {
console.error('请求失败:', error);
resultDisplay.textContent = `更新分数失败,请重试。`;
}); });
});
// 错误答案处理
wrongButton.addEventListener('click', () => {
userPoints -= 5;
localStorage.setItem(name, userPoints); // 保存更新后的积分
resultDisplay.textContent = `错误!${name} 的当前积分: ${userPoints}`;
wrongButton.addEventListener('click', () => {
updateScore(student_id, 0.5)
.then(newscore => {
if (newscore !== null) {
resultDisplay.textContent = `回答基本正确!${student_id} 的当前积分: ${newscore}`; // 直接使用字符串
} else {
console.error('更新分数失败');
resultDisplay.textContent = `更新分数失败,请重试。`;
}
})
.catch(error => {
console.error('请求失败:', error);
resultDisplay.textContent = `更新分数失败,请重试。`;
}); });
});
</script> </script>
</body> </body>
</html> </html>

@ -55,24 +55,22 @@
<script> <script>
// 获取URL中的参数名字 // 获取URL中的参数名字
const urlParams = new URLSearchParams(window.location.search); const urlParams = new URLSearchParams(window.location.search);
const name = urlParams.get('name'); const name = urlParams.get('student_name');
const id = urlParams.get('student_id');
// 显示被抽中的名字 // 显示被抽中的名字
const nameDisplay = document.querySelector('#nameDisplay'); const nameDisplay = document.querySelector('#nameDisplay');
nameDisplay.textContent = ` ${name} 你的选择是:`; nameDisplay.textContent = ` ${name} 你的选择是:`;
// 初始化用户的积分
let userPoints = localStorage.getItem(name) ? parseInt(localStorage.getItem(name)) : 0;
if (!localStorage.getItem(name)) {
localStorage.setItem(name, 0); // 如果没有积分记录,初始化为 0
}
// 回答问题功能,跳转到回答问题页面 // 回答问题功能,跳转到回答问题页面
document.querySelector('#answerButton').addEventListener('click', () => { document.querySelector('#answerButton').addEventListener('click', () => {
window.location.href = `answer.html?name=${encodeURIComponent(name)}`; window.location.href = `answer.html?student_name=${encodeURIComponent(name)}&student_id=${encodeURIComponent(id)}`;
}); });
// 抽奖功能,跳转到抽奖页面 // 抽奖功能,跳转到抽奖页面
document.querySelector('#lotteryButton').addEventListener('click', () => { document.querySelector('#lotteryButton').addEventListener('click', () => {
window.location.href = `lottery.html?name=${encodeURIComponent(name)}`; window.location.href = `lottery.html?student_name=${encodeURIComponent(name)}&student_id=${encodeURIComponent(id)}`;
}); });
</script> </script>

@ -0,0 +1,65 @@
const fs = require('fs');
const path = require('path');
const xlsx = require('xlsx');
const pool = require('../db');
const classManager = {
addClass: async (req, res) => {
// 创建students表的SQL语句
const createTableQuery = `
CREATE TABLE IF NOT EXISTS students (
student_id INT AUTO_INCREMENT PRIMARY KEY,
student_name VARCHAR(255) NOT NULL,
score DECIMAL(5, 2),
call_count INT DEFAULT 0
);
`;
try {
// 先创建表
await pool.query(createTableQuery);
const filePath = req.file.path;
// 读取并解析Excel文件
const workbook = xlsx.readFile(filePath);
const sheetName = workbook.SheetNames[0];
const worksheet = workbook.Sheets[sheetName];
const students = xlsx.utils.sheet_to_json(worksheet);
// 定义所需的字段
const requiredFields = ['student_id','student_name'];
let hasError = false;
students.forEach(student => {
// 数据验证
const missingFields = requiredFields.filter(field =>!(field in student));
if (missingFields.length > 0) {
console.error(`Student data is missing fields: ${missingFields.join(', ')}`);
hasError = true;
return;
}
// 将学生数据插入数据库
const query = 'INSERT INTO students (student_id, student_name, score, call_count) VALUES (?,?, 0, 0)';
pool.query(query, [student.student_id, student.student_name], (error) => {
if (error) {
console.error(`Error inserting student: ${student.name}`, error);
hasError = true;
}
});
});
if (hasError) {
res.status(500).json({ message: 'Error adding class. Some students were not added successfully.' });
} else {
res.status(200).json({ message: 'Class added successfully!' });
}
} catch (err) {
console.error('Error creating students table:', err);
res.status(500).json({ message: 'Error creating table during class addition.' });
}
}
};
module.exports = classManager;

24
db.js

@ -0,0 +1,24 @@
const mysql = require('mysql2/promise');
// 创建连接池
const pool = mysql.createPool({
host: 'localhost', // 数据库地址
user: 'root', // 数据库用户名
password: '123456', // 数据库密码
database: 'class_k' ,// 使用的数据库
waitForConnections: true,
connectionLimit: 10,
queueLimit: 0
});
// 测试数据库连接
pool.getConnection((err, connection) => {
if (err) {
console.error('Error connecting to the database:', err);
} else {
console.log('Database connected successfully!');
connection.release(); // 释放连接
}
});
module.exports = pool;

@ -0,0 +1,22 @@
const pool = require('../db');
async function deleteTable(req, res) {
const { tableName } = req.body; // 从请求体中获取表名
let connection;
try {
connection = await pool.getConnection();
await connection.query(`DROP TABLE IF EXISTS ??`, [tableName]); // 删除表
connection.release();
res.json({ message: `${tableName} 已被成功删除` });
} catch (error) {
console.error('删除表失败:', error);
res.status(500).json({ error: '删除表失败' });
} finally {
if (connection) {
connection.release();
}
}
}
module.exports = { deleteTable };

@ -99,8 +99,8 @@ startAttendanceButton.addEventListener('click', async () => {
const response = await fetch('http://localhost:3000/api/random-call'); const response = await fetch('http://localhost:3000/api/random-call');
const data = await response.json(); const data = await response.json();
if (data.student) { if (data.student_id && data.student_name) {
currentStudent = data.student; currentStudent = data;
studentNameDisplay.textContent = `当前学生: ${currentStudent.student_name}`; studentNameDisplay.textContent = `当前学生: ${currentStudent.student_name}`;
presentButton.style.display = 'inline-block'; presentButton.style.display = 'inline-block';
absentButton.style.display = 'inline-block'; absentButton.style.display = 'inline-block';
@ -117,8 +117,8 @@ startAttendanceButton.addEventListener('click', async () => {
// 到场按钮点击事件 // 到场按钮点击事件
presentButton.addEventListener('click', async () => { presentButton.addEventListener('click', async () => {
if (currentStudent) { if (currentStudent) {
await updatePoints(currentStudent.student_id, 1); // 到场加1 await updatePoints(currentStudent.student_id, 0.5); // 到场加0.5
alert(`${currentStudent.student_name} 已到,加1分`); alert(`${currentStudent.student_name} 已到,加0.5分`);
resetAttendance(); resetAttendance();
} }
}); });
@ -126,7 +126,7 @@ presentButton.addEventListener('click', async () => {
// 没到按钮点击事件 // 没到按钮点击事件
absentButton.addEventListener('click', async () => { absentButton.addEventListener('click', async () => {
if (currentStudent) { if (currentStudent) {
await updatePoints(currentStudent.student_id, -1); // 未到减2 await updatePoints(currentStudent.student_id, -1); // 未到减1
alert(`${currentStudent.student_name} 未到减1分`); alert(`${currentStudent.student_name} 未到减1分`);
resetAttendance(); resetAttendance();
} }

@ -65,8 +65,43 @@
<button onclick="window.location.href='dianming.html'">课堂点名</button> <button onclick="window.location.href='dianming.html'">课堂点名</button>
<button onclick="window.location.href='select.html'">随机提问</button> <button onclick="window.location.href='select.html'">随机提问</button>
<button onclick="window.location.href='score_display.html'">积分显示</button> <button onclick="window.location.href='score_display.html'">积分显示</button>
<button onclick="document.getElementById('fileInput').click()">导入学生名单</button>
<input type="file" id="fileInput" accept=".xlsx" style="display:none;" onchange="importStudents(event)">
</div> </div>
</div> </div>
<script>
async function importStudents() {
const fileInput = document.getElementById('fileInput');
const file = fileInput.files[0]; // 获取选中的文件
if (!file) {
alert('请选择一个文件');
return;
}
const formData = new FormData();
formData.append('file', file); // 将文件添加到FormData中键名为'file'
try {
const response = await fetch('/api/upload', { // 假设后端API的路径为/api/upload
method: 'POST',
body: formData
});
if (response.ok) {
const result = await response.json();
console.log('上传成功:', result);
alert('学生名单导入成功!');
} else {
console.error('上传失败:', response.statusText);
alert('导入失败,请重试。');
}
} catch (error) {
console.error('请求错误:', error);
alert('发生错误,请检查控制台了解详细信息。');
}
}
</script>
</body> </body>
</html> </html>

@ -64,12 +64,8 @@
<script> <script>
const urlParams = new URLSearchParams(window.location.search); const urlParams = new URLSearchParams(window.location.search);
let name = urlParams.get('name'); let student_name = urlParams.get('student_name');
let student_id = urlParams.get('student_id');
// 如果 URL 中没有 name 参数,尝试从 localStorage 获取
if (!name) {
name = localStorage.getItem('currentUserName');
}
const pointsDisplay = document.querySelector('#pointsDisplay'); const pointsDisplay = document.querySelector('#pointsDisplay');
const startLotteryButton = document.querySelector('#startLotteryButton'); const startLotteryButton = document.querySelector('#startLotteryButton');
@ -82,54 +78,123 @@
return new Promise(resolve => setTimeout(resolve, d)); return new Promise(resolve => setTimeout(resolve, d));
} }
// 获取该用户的积分 // 全局变量,用于存储用户积分
let userPoints = parseInt(localStorage.getItem(name)) || 0; let userPoints = null;
pointsDisplay.textContent = `${name} 的当前积分: ${userPoints}`;
// 获取该用户的分数
const fetchStudentScore = async (student_id) => {
try {
const response = await fetch('http://localhost:3000/api/get-score', {
method: 'POST', // 使用 POST 方法
headers: {
'Content-Type': 'application/json', // 设置请求体的内容类型
},
body: JSON.stringify({ student_id }), // 将 student_id 放入请求体
});
if (!response.ok) {
alert('分数获取失败');
return null; // 返回 null 表示获取失败
}
// 直接返回响应体中的数字
const data = await response.json(); // 直接解析为 JSON
const score = data.score;
return score; // 返回数字
} catch (error) {
alert('网络请求失败');
return null; // 返回 null 表示获取失败
}
};
// 更新用户分数
async function updateScore(student_id, points) {
try {
const response = await fetch('http://localhost:3000/api/update-score', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify({ student_id, points }),
});
if (!response.ok) {
throw new Error('网络响应不正常');
}
// 使用 text() 解析响应,得到字符串形式的分数
const data = await response.text();
let score = Number(data); // 转换为数字
return score; // 返回数字
} catch (error) {
console.error('分数更新失败:', error);
return null; // 返回 null 表示更新失败
}
}
// 初始化函数,用于设置用户积分
async function init() {
userPoints = await fetchStudentScore(student_id); // 获取分数并存储到全局变量
pointsDisplay.textContent = `${student_name} 的当前积分: ${userPoints}`;
}
// 执行初始化函数
init();
// 设置返回按钮的 URL // 设置返回按钮的 URL
backButton.onclick = () => { backButton.onclick = () => {
loadingIndicator.style.display = 'block'; // 显示加载提示 loadingIndicator.style.display = 'block'; // 显示加载提示
window.location.href = `choice.html?name=${encodeURIComponent(name)}`; window.location.href = `choice.html?student_name=${encodeURIComponent(student_name)}&student_id=${encodeURIComponent(student_id)}`;
}; };
// 抽奖逻辑 // 开始抽奖
startLotteryButton.addEventListener('click', async () => { startLotteryButton.addEventListener('click', async () => {
if (userPoints >= 20) { if (userPoints >= 2) {
userPoints -= 20; // 每次抽奖消耗 20 分 userPoints = await updateScore(student_id, -2); // 积分-2
localStorage.setItem(name, userPoints); // 保存更新后的积分
pointsDisplay.textContent = `${name} 的当前积分: ${userPoints}`; pointsDisplay.textContent = `${student_name} 的当前积分: ${userPoints}`;
// 随机选择奖品 // 随机选择奖品
const prizes = ["跳过权", "再来一次", "什么也没有发生", "加30积分且跳过"]; const prizes = ["跳过权", "再来一次", "什么也没有发生", "加3积分且跳过"];
const randomPrize = prizes[Math.floor(Math.random() * prizes.length)]; const randomPrize = prizes[Math.floor(Math.random() * prizes.length)];
resultDisplay.textContent = `你赢得了: ${randomPrize}`; resultDisplay.textContent = `你赢得了: ${randomPrize}`;
// 等待 2 秒以展示结果 // 等待 2 秒以展示结果
await sleep(2000); await new Promise(resolve => setTimeout(resolve, 2000));
loadingIndicator.style.display = 'block'; // 显示加载提示 loadingIndicator.style.display = 'block'; // 显示加载提示
if (randomPrize === '跳过权') { if (randomPrize === '跳过权') {
await sleep(1000); await sleep(2000);
window.location.href = `select.html?name=${encodeURIComponent(name)}`; window.location.href = `select.html?student_name=${encodeURIComponent(student_name)}&student_id=${encodeURIComponent(student_id)}`;
} else if (randomPrize === '再来一次') { }
userPoints += 20;
localStorage.setItem(name, userPoints); else if (randomPrize === '再来一次') {
} else if (randomPrize === '什么也没有发生') { userPoints = await updateScore(student_id, 2); // 积分返回2
await sleep(1000); await sleep(2000);
window.location.href = `answer.html?name=${encodeURIComponent(name)}`; window.location.href = `lottery.html?student_name=${encodeURIComponent(student_name)}&student_id=${encodeURIComponent(student_id)}`;
} else if (randomPrize === '加30积分且跳过') {
userPoints += 30;
localStorage.setItem(name, userPoints);
await sleep(1000);
window.location.href = `select.html?name=${encodeURIComponent(name)}`;
} }
else if (randomPrize === '什么也没有发生') {
await sleep(2000);
window.location.href = `answer.html?student_name=${encodeURIComponent(student_name)}&student_id=${encodeURIComponent(student_id)}`;
}
else if (randomPrize === '加3积分且跳过') {
userPoints = await updateScore(student_id, 3); // 积分+3
await sleep(2000);
window.location.href = `select.html?student_name=${encodeURIComponent(student_name)}&student_id=${encodeURIComponent(student_id)}`;
}
} else { } else {
resultDisplay.textContent = "积分不足,无法抽奖!"; resultDisplay.textContent = "积分不足,无法抽奖!返回回答问题";
loadingIndicator.style.display = 'block'; // 显示加载提示 loadingIndicator.style.display = 'block'; // 显示加载提示
await sleep(1000); await sleep(2000);
window.location.href = `answer.html?name=${encodeURIComponent(name)}`; window.location.href = `answer.html?student_name=${encodeURIComponent(student_name)}&student_id=${encodeURIComponent(student_id)}`;
} }
}); });
</script> </script>
</body> </body>
</html> </html>

@ -0,0 +1,9 @@
{
"dependencies": {
"body-parser": "^1.20.3",
"express": "^4.21.0",
"multer": "^1.4.5-lts.1",
"mysql2": "^3.11.3",
"xlsx": "^0.18.5"
}
}

@ -0,0 +1,47 @@
const pool = require('../db');
async function selectStudent(req, res) {
try {
const connection = await pool.getConnection();
// 从数据库查询学生
const [students] = await connection.query('SELECT * FROM students');
// 计算权重的总和(使用 softmax 权重计算)
const totalWeight = students.reduce((acc, student) => acc + Math.exp(-student.score), 0);
// 将每个学生的权重归一化
const weightedStudents = students.map(student => ({
student,
weight: Math.exp(-student.score) / totalWeight,
}));
// 生成随机数
const random = Math.random(); // 介于 0 和 1 之间
let sum = 0; // 用于累加权重
let selectedStudent = null;
// 遍历加权后的学生,累加权重,并判断随机数落在哪个学生的区间
for (let i = 0; i < weightedStudents.length; i++) {
sum += weightedStudents[i].weight; // 累加当前学生的权重
if (random <= sum) { // 如果随机数小于或等于当前的累积权重
selectedStudent = weightedStudents[i].student; // 选中该学生
break; // 找到后立即退出循环
}
}
if (selectedStudent) {
res.send({ student_name: selectedStudent.student_name,
student_id: selectedStudent.student_id
});
} else {
res.status(404).send({ message: '无学生数据' });
}
connection.release();
} catch (error) {
res.status(500).send({ error: '随机选择学生失败' });
}
}
module.exports = { selectStudent };

@ -0,0 +1,25 @@
const pool = require('../db');
async function get_descend_Ranking(req, res) {
try {
const connection = await pool.getConnection();
const [ranking] = await connection.query('SELECT student_name, student_id, score FROM students ORDER BY score DESC');
connection.release();
res.json(ranking);
} catch (error) {
res.status(500).send({ error: '无法获取排名' });
}
}
async function get_ascend_Ranking(req, res) {
try {
const connection = await pool.getConnection();
const [ranking] = await connection.query('SELECT student_name, student_id, score FROM students ORDER BY score ASC');
connection.release();
res.json(ranking);
} catch (error) {
res.status(500).send({ error: '无法获取排名' });
}
}
module.exports = { get_ascend_Ranking, get_descend_Ranking };

@ -0,0 +1,50 @@
const express = require('express');
const router = express.Router();
const multer = require('multer');
const randomSelect = require('./services/randomSelect');
const ranking = require('./services/ranking');
const classManager = require('./services/classManager');
const scoreManager = require('./services/scoreManager');
const TableManager = require('./services/delete-table');
const pool = require('./db');
// 文件上传配置
const upload = multer({ dest: 'uploads/' });
// 路由 - 添加班级
router.post('/upload', upload.single('file'), classManager.addClass);
// 路由 - 随机点名
router.get('/random-call', randomSelect.selectStudent);
// 路由 - 获取排名
router.get('/ascend_ranking', ranking.get_ascend_Ranking);
router.get('/descend_ranking', ranking.get_descend_Ranking);
// 路由 - 更新分数
router.post('/update-score', scoreManager.updateScore);
//路由 - 获取某个id的分数
router.post('/get-score', scoreManager.getStudentScore);
//路由 - 删除班级
router.post('/delete-table', TableManager.deleteTable);
// 获取全部学生名单
router.get('/get-students', async (req, res) => {
let connection; // 声明连接变量
try {
connection = await pool.getConnection(); // 从连接池获取连接
const [students] = await connection.query('SELECT student_name FROM students'); // 执行查询
const studentNames = students.map(student => ({ student_name: student.student_name })); // 只保留 student_name 字段
res.json(studentNames); // 返回只包含 student_name 的结果
} catch (error) {
console.error('Error fetching students:', error); // 记录错误信息
res.status(500).send({ error: 'Failed to fetch students' }); // 返回500错误响应
} finally {
if (connection) connection.release(); // 确保连接被释放
}
});
module.exports = router;

@ -0,0 +1,93 @@
const pool = require('../db');
async function updateScore(req, res) {
const { student_id, points } = req.body; //假设前端发送的数据是这两部分
const pool = require('../db');
async function updateScore(req, res) {
const { student_id, points } = req.body;
let connection; // 在try块外部声明connection
try {
connection = await pool.getConnection();
// 更新学生的积分并增加点名次数
const [result] = await connection.query(
'UPDATE students SET score = score + ?, call_count = call_count + 1 WHERE student_id = ?',
[points, student_id]
);
if (result.affectedRows > 0) {
// 查询更新后的分数
const [rows] = await connection.query(
'SELECT score FROM students WHERE student_id = ?',
[student_id]
);
if (rows.length > 0) {
const updatedScore = rows[0].score;
return res.send(String(updatedScore));
} else {
return res.status(404).send('学生不存在');
}
} else {
return res.status(404).send('学生不存在');
}
} catch (error) {
console.error('数据库操作失败:', error);
return res.status(500).send('更新积分失败');
} finally {
if (connection) {
connection.release(); // 只有在connection已被赋值时才调用release
}
}
}
async function getStudentScore(req, res) {
const { student_id } = req.body;
let connection;
try {
connection = await pool.getConnection();
// 查询指定学生的分数
const [rows] = await connection.query(
'SELECT score FROM students WHERE student_id =?',
[student_id]
);
if (rows.length > 0) {
const score = rows[0].score;
// 修改这里构建包含student_id和score的对象并返回
return res.json({ student_id, score });
} else {
return res.status(404).json({ message: '学生不存在' });
}
} catch (error) {
console.error('数据库操作失败:', error);
return res.status(500).json({ error: '获取分数失败' });
} finally {
if (connection) {
connection.release();
}
}
}
module.exports = { updateScore, getStudentScore };
try {
const connection = await pool.getConnection();
const [result] = await connection.query('UPDATE students SET score = score + ?, call_count = call_count + 1 WHERE student_id = ?', [points, student_id]);
if (result.affectedRows > 0) {
res.send({ message: '积分已更新' });
} else {
res.status(404).send({ message: '学生不存在' });
}
connection.release();
} catch (error) {
res.status(500).send({ error: '更新积分失败' });
}
}
module.exports = { updateScore };

@ -118,6 +118,7 @@
<thead> <thead>
<tr> <tr>
<th>姓名</th> <th>姓名</th>
<th>学号</th>
<th>积分</th> <th>积分</th>
</tr> </tr>
</thead> </thead>
@ -135,61 +136,112 @@
const studentList = document.getElementById('studentList'); const studentList = document.getElementById('studentList');
const sortButton = document.getElementById('sortButton'); const sortButton = document.getElementById('sortButton');
const clearButton = document.getElementById('clearButton'); const clearButton = document.getElementById('clearButton');
let ascending = false; // 默认降序 let ascend = false; // 默认降序
// 预定义学生名单
const predefinedStudents = [ //删除表
{ name: '张三', points: 0 }, async function deleteTable(tableName) {
{ name: '李四', points: 0 }, try {
{ name: '王五', points: 0 }, const response = await fetch('/api/delete-table', {
{ name: '赵六', points: 0 }, method: 'POST',
]; headers: {
'Content-Type': 'application/json',
// 获取所有学生,包括预定义名单 },
function getAllStudents() { body: JSON.stringify({ tableName }),
const students = predefinedStudents.map(student => { });
const storedPoints = localStorage.getItem(student.name);
return { if (!response.ok) {
name: student.name, throw new Error('删除表失败');
points: storedPoints !== null ? parseInt(storedPoints) : student.points }
};
}); const data = await response.json();
return students; alert(data.message); // 成功后显示消息
} catch (error) {
console.error('删除表操作失败:', error);
alert('删除表失败');
}
}
// 获取按分数降序排列的学生排名
async function fetchDescendRanking() {
try {
const response = await fetch('/api/descend_ranking');
if (!response.ok) {
alert('无法获取降序排名');
return null;
}
const ranking = await response.json(); // 获取并解析为JSON数组
return ranking; // 返回排名数组
} catch (error) {
console.error('请求失败:', error);
return null;
}
}
// 获取按分数升序排列的学生排名
async function fetchAscendRanking() {
try {
const response = await fetch('/api/ascend_ranking');
if (!response.ok) {
alert('无法获取升序排名');
return null;
}
const ranking = await response.json(); // 获取并解析为JSON数组
return ranking; // 返回排名数组
} catch (error) {
console.error('请求失败:', error);
return null;
}
} }
// 显示学生积分 async function displayStudents() {
function displayStudents() { let ranking; // 声明 ranking 变量
const students = getAllStudents(); if (ascend) {
students.sort((a, b) => ascending ? a.points - b.points : b.points - a.points); ranking = await fetchAscendRanking(); // 获取升序排名
studentList.innerHTML = ''; } else {
students.forEach(student => { ranking = await fetchDescendRanking(); // 获取降序排名
}
// 检查 ranking 是否为空
if (!ranking) {
alert('空 ranking');
return; // 退出函数
}
studentList.innerHTML = ''; // 清空表格内容
// 只显示前五名学生
ranking.slice(0, 5).forEach(student => {
studentList.innerHTML += ` studentList.innerHTML += `
<tr> <tr>
<td>${student.name}</td> <td>${student.student_name}</td> <!-- 学生姓名 -->
<td>${student.points}</td> <td>${student.student_id}</td> <!-- 学生ID -->
<td>${student.score}</td> <!-- 学生分数 -->
</tr> </tr>
`; `;
}); });
} }
// 切换排序
sortButton.addEventListener('click', () => { sortButton.addEventListener('click', () => {
ascending = !ascending; ascend = !ascend;
sortButton.textContent = `切换排序 (${ascending ? '升序' : '降序'})`; sortButton.textContent = `切换排序 (${ascend ? '升序' : '降序'})`;
displayStudents(); displayStudents();
}); });
// 清除所有数据
clearButton.addEventListener('click', () => { clearButton.addEventListener('click', () => {
const confirmation = confirm("确定要清除所有学生数据吗?此操作无法撤销!"); const confirmation = confirm("确定要清除所有学生数据吗?此操作无法撤销!");
if (confirmation) { if (confirmation) {
localStorage.clear(); deleteTable('students');
alert("所有数据已清除!"); alert("所有信息已清除!");
displayStudents(); // 重新显示清空后的数据 displayStudents(); // 重新显示清空后的数据
} }
}); });
// 初次加载时显示学生积分
displayStudents(); displayStudents();
</script> </script>

@ -118,35 +118,35 @@
}); });
// 停止滚动并通过后端决定最终选择的学生 // 停止滚动并通过后端决定最终选择的学生
stopButton.addEventListener('click', () => { stopButton.addEventListener('click', async () => {
clearInterval(intervalId); clearInterval(intervalId);
startButton.disabled = false; startButton.disabled = false;
stopButton.disabled = true; stopButton.disabled = true;
// 调用后端接口获取最终选中的学生 try {
fetch('/api/random-call') const response = await fetch('/api/random-call');
.then(response => {
if (!response.ok) { if (!response.ok) {
throw new Error('Network response was not ok'); throw new Error('Network response was not ok');
} }
return response.json();
}) const data = await response.json();
.then(data => { // 从后端返回的数据中获取学生名字
// 从后端返回的数据中获取学生名字 const selectedName = data.student_name; // student_name 属性
if (data.student && data.student.name) {
const selectedName = data.student.name; if (selectedName) {
// 更新显示选中的学生 // 更新显示选中的学生
updateNameDisplay(selectedName); updateNameDisplay(selectedName);
// 跳转到新页面并传递被选中的名字 // 跳转到新页面并传递被选中的名字
window.location.href = `choice.html?name=${encodeURIComponent(selectedName)}`; window.location.href = `choice.html?student_name=${encodeURIComponent(data.student_name)}&student_id=${encodeURIComponent(data.student_id)}`;
} else { } else {
console.error('未返回有效学生数据'); console.error('未返回有效学生数据');
} }
}) } catch (error) {
.catch(error => { console.error('请求失败:', error);
console.error('请求失败:', error); }
}); });
});
</script> </script>
</body> </body>

@ -0,0 +1,26 @@
const express = require('express');
const path = require('path');
const bodyParser = require('body-parser');
const router = require('./router');
const app = express();
// 中间件
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
// API 路由
app.use('/api', router);
// 静态文件
app.use(express.static(path.join(__dirname, 'public')));
// 处理 SPA 路由
app.get('*', (req, res) => {
res.sendFile(path.join(__dirname, 'public', 'index.html'));
});
// 启动服务器
const PORT = process.env.PORT || 3000;
app.listen(PORT, () => {
console.log(`Server running on port ${PORT}`);
});
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