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