上传后端代码

index.js

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+let originalData = [];
+let updatedData = [];
+let workbook;
+let sheetName;
+let skippedStudents = [];
+// 导入学生名单
+document.getElementById('excelFileInput').addEventListener('change', function (e) {
+    var file = e.target.files[0];
+    if (!file) {
+        return;
+    }
+    var reader = new FileReader();
+    reader.onload = function (e) {
+        var data = new Uint8Array(e.target.result);
+        workbook = XLSX.read(data, { type: 'array' });
+        sheetName = workbook.SheetNames[0];
+        var worksheet = workbook.Sheets[sheetName];
+        originalData = XLSX.utils.sheet_to_json(worksheet);
+        updatedData = JSON.parse(JSON.stringify(originalData));
+        var displayDiv = document.getElementById('excelDataDisplay');
+        // 添加表头
+        displayDiv.innerHTML = '<div style="display: flex; justify-content: space-between;"><span>学号</span><span>姓名</span><span>积分</span></div>';
+        updatedData.forEach(function (row) {
+            var rowDiv = document.createElement('div');
+            Object.keys(row).forEach(key => {
+                var cellDiv = document.createElement('span');
+                cellDiv.textContent = row[key] + ' ';
+                rowDiv.appendChild(cellDiv);
+            });
+            displayDiv.appendChild(rowDiv);
+        });
+    };
+    reader.readAsArrayBuffer(file);
+});
+
+// 点名按钮
+document.getElementById('callButton').addEventListener('click', function () {
+    // 去除上一次的高亮
+    var displayDiv = document.getElementById('excelDataDisplay');
+    Array.from(displayDiv.children).forEach(child => child.style.backgroundColor = '');
+
+    // 过滤掉因上次回答问题得分超过2.5而跳过的学生
+    let eligibleStudents = updatedData.filter(student => !skippedStudents.includes(student));
+
+    // 计算总积分
+    let totalPoints = eligibleStudents.reduce((acc, student) => {
+        let pointsKey = Object.keys(student).find(key => key.includes('积分'));
+        return acc + (pointsKey ? parseInt(student[pointsKey]) : 0);
+    }, 0);
+
+    // 确保总积分不为零
+    if (totalPoints === 0) {
+        // 如果总积分为零，可以随机选择一个学生或者采取其他处理方式
+        let randomIndex = Math.floor(Math.random() * eligibleStudents.length);
+        let selectedStudent = eligibleStudents[randomIndex];
+        var displayDiv = document.getElementById('excelDataDisplay');
+        var rows = Array.from(displayDiv.children).slice(1);
+        var selectedRow = rows.find(row => row.querySelector('span').textContent.trim() === selectedStudent[Object.keys(selectedStudent)[0]]);
+        selectedRow.style.backgroundColor = 'lightblue';
+        // 获取选中行的学号和姓名并显示在主页面
+        var studentInfo = selectedRow.querySelectorAll('span');
+        var studentId = studentInfo[0].textContent.trim();
+        var studentName = studentInfo[1].textContent.trim();
+        var selectedStudentDiv = document.getElementById('selectedStudentInfo');
+        selectedStudentDiv.innerHTML = `<p>点到的学生学号：${studentId}，姓名：${studentName}</p>`;
+        return;
+    }
+
+    // 计算每个学生被选中的概率（总积分越高，被点到的概率越低）
+    let probabilities = eligibleStudents.map(student => {
+        let pointsKey = Object.keys(student).find(key => key.includes('积分'));
+        let studentPoints = pointsKey ? parseInt(student[pointsKey]) : 0;
+        return 1 / (studentPoints + 1) / totalPoints;
+    });
+
+    // 使用 Math.random 和 Date.now 作为种子
+    let randomValue = Math.random() + Date.now() % 1000 / 1000;
+    let cumulativeProbability = 0;
+    let selectedStudent;
+    for (let i = 0; i < eligibleStudents.length; i++) {
+        cumulativeProbability += probabilities[i];
+        if (randomValue < cumulativeProbability) {
+            selectedStudent = eligibleStudents[i];
+            break;
+        }
+    }
+
+    if (selectedStudent) {
+        var displayDiv = document.getElementById('excelDataDisplay');
+        var rows = Array.from(displayDiv.children).slice(1);
+        var selectedRow = rows.find(row => row.querySelector('span').textContent.trim() === selectedStudent[Object.keys(selectedStudent)[0]]);
+        selectedRow.style.backgroundColor = 'lightblue';
+        // 获取选中行的学号和姓名并显示在主页面
+        var studentInfo = selectedRow.querySelectorAll('span');
+        var studentId = studentInfo[0].textContent.trim();
+        var studentName = studentInfo[1].textContent.trim();
+        var selectedStudentDiv = document.getElementById('selectedStudentInfo');
+        selectedStudentDiv.innerHTML = `<p>点到的学生学号：${studentId}，姓名：${studentName}</p>`;
+    }
+});
+
+// 到达教室按钮
+document.getElementById('arriveClassroom').addEventListener('click', function () {
+    var displayDiv = document.getElementById('excelDataDisplay');
+    var rows = Array.from(displayDiv.children).slice(1);
+    if (rows.length > 0) {
+        var selectedRow = rows.find(row => row.style.backgroundColor === 'lightblue');
+        if (selectedRow) {
+            var studentInfo = selectedRow.querySelectorAll('span');
+            var studentId = studentInfo[0].textContent.trim();
+            var studentName = studentInfo[1].textContent.trim();
+            // 查找对应的学生并增加积分
+            var student = updatedData.find(student => student[Object.keys(student)[0]] === studentId && student[Object.keys(student)[1]] === studentName);
+            if (student) {
+                let pointsKey = Object.keys(student).find(key => key.includes('积分'));
+                if (pointsKey) {
+                    student[pointsKey] = parseFloat(student[pointsKey]) + 1;
+                    // 更新显示
+                    var rowSpans = selectedRow.querySelectorAll('span');
+                    rowSpans[rowSpans.length - 1].textContent = student[pointsKey];
+                }
+            }
+        }
+    }
+});
+
+// 准确重复所提问的问题
+document.getElementById('repeatedQuestionYes').addEventListener('click', function () {
+    var displayDiv = document.getElementById('excelDataDisplay');
+    var rows = Array.from(displayDiv.children).slice(1);
+    if (rows.length > 0) {
+        var selectedRow = rows.find(row => row.style.backgroundColor === 'lightblue');
+        if (selectedRow) {
+            var studentInfo = selectedRow.querySelectorAll('span');
+            var studentId = studentInfo[0].textContent.trim();
+            var studentName = studentInfo[1].textContent.trim();
+            // 查找对应的学生并增加积分
+            var student = updatedData.find(student => student[Object.keys(student)[0]] === studentId && student[Object.keys(student)[1]] === studentName);
+            if (student) {
+                let pointsKey = Object.keys(student).find(key => key.includes('积分'));
+                if (pointsKey) {
+                    student[pointsKey] = parseFloat(student[pointsKey]) + 0.5;
+                    // 更新显示
+                    var rowSpans = selectedRow.querySelectorAll('span');
+                    rowSpans[rowSpans.length - 1].textContent = student[pointsKey];
+                }
+            }
+        }
+    }
+});
+
+// 不能准确重复所提问的问题
+document.getElementById('repeatedQuestionNo').addEventListener('click', function () {
+    var displayDiv = document.getElementById('excelDataDisplay');
+    var rows = Array.from(displayDiv.children).slice(1);
+    if (rows.length > 0) {
+        var selectedRow = rows.find(row => row.style.backgroundColor === 'lightblue');
+        if (selectedRow) {
+            var studentInfo = selectedRow.querySelectorAll('span');
+            var studentId = studentInfo[0].textContent.trim();
+            var studentName = studentInfo[1].textContent.trim();
+            // 查找对应的学生并减少积分
+            var student = updatedData.find(student => student[Object.keys(student)[0]] === studentId && student[Object.keys(student)[1]] === studentName);
+            if (student) {
+                let pointsKey = Object.keys(student).find(key => key.includes('积分'));
+                if (pointsKey) {
+                    student[pointsKey] = parseFloat(student[pointsKey]) - 1;
+                    // 更新显示
+                    var rowSpans = selectedRow.querySelectorAll('span');
+                    rowSpans[rowSpans.length - 1].textContent = student[pointsKey];
+                }
+            }
+        }
+    }
+});
+
+// 增加自定义分数
+document.getElementById('addScoreButton').addEventListener('click', function () {
+    var inputScore = parseFloat(document.getElementById('addScoreInput').value);
+    if (inputScore >= 0.5 && inputScore <= 3 && !isNaN(inputScore)) {
+        var displayDiv = document.getElementById('excelDataDisplay');
+        var rows = Array.from(displayDiv.children).slice(1);
+        if (rows.length > 0) {
+            var selectedRow = rows.find(row => row.style.backgroundColor === 'lightblue');
+            if (selectedRow) {
+                var studentInfo = selectedRow.querySelectorAll('span');
+                var studentId = studentInfo[0].textContent.trim();
+                var studentName = studentInfo[1].textContent.trim();
+                // 查找对应的学生并增加积分
+                var student = updatedData.find(student => student[Object.keys(student)[0]] === studentId && student[Object.keys(student)[1]] === studentName);
+                if (student) {
+                    let pointsKey = Object.keys(student).find(key => key.includes('积分'));
+                    if (pointsKey) {
+                        student[pointsKey] = parseFloat(student[pointsKey]) + inputScore;
+                        // 更新显示
+                        var rowSpans = selectedRow.querySelectorAll('span');
+                        rowSpans[rowSpans.length - 1].textContent = student[pointsKey];
+
+                        // 如果得分超过 2.5 分，将该学生加入跳过列表
+                        if (student[pointsKey] > 2.5) {
+                            skippedStudents.push(student);
+                        }
+                    }
+                }
+            }
+        }
+    } else {
+        alert('输入的分数应在 0.5 到 3 之间且为有效数字。');
+    }
+});