前端本地文件获取excel表格内容并渲染在页面的方法
作者:淇淇包.
这篇文章主要介绍了前端本地文件获取excel表格内容并渲染在页面的方法,主要利用SheetJS插件用于处理Excel文件,文中通过代码介绍的非常详细,需要的朋友可以参考下
插件:SheetJs ,如若想要了解更多,可参考官网:SheetJS 中文网
效果图:
方法1: XLSX.readFile(filename, opts) 读取指定文件并生成 SheetJS 工作簿对象
如果表格内容较少,体验较好
如果表格内容很多,几千行,则不推荐,数据量过大会导致页面卡死,体验差
代码:
<!DOCTYPE html> <html lang="cn"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>可在线展示Excel的js插件</title> <style> html,body { width: 100%; height: 100%; padding: 0; margin: 0; } .container { overflow: auto; width: 100%; height: 100%; } table { width: 100%; border-collapse: collapse; } th, td { border: 1px solid #ddd; padding: 8px; } th { background-color: #f2f2f2; text-align: left; } </style> <script src="https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.18.5/xlsx.full.min.js"></script> </head> <body> <div class="container" id="container"> </div> <script> var nContainer = document.getElementById('container'); var xlsx = new Plus.Xlsx(nContainer); xlsx.readFile('本地文件路径'); </script> </body> </html>
方法2:XLSX.read(data, opts) 解析文件数据并生成 SheetJS 工作簿对象
可获取固定的数据格式,并处理懒加载方式,从而缓解数据量过大卡死现象
代码:
<!DOCTYPE html> <html lang="cn"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>可在线展示Excel的 js插件</title> <style> html,body { width: 100%; height: 100%; padding: 0; margin: 0; } .container { overflow: auto; width: 100%; height: 100%; } table { width: 100%; border-collapse: collapse; } th, td { border: 1px solid #ddd; padding: 8px; } th { background-color: #f2f2f2; text-align: left; } </style> <script type="text/javascript" src="/jquery-3.6.0.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.18.5/xlsx.full.min.js"></script> </head> <body> <div id="excel-data" class="container"></div> <script type="text/javascript"> const excelData = $('#excel-data'); let allData = []; let loadedRows = 0; const pageSize = 50; let mergeInfo = {}; let currentMergeCounts = {}; async function loadStaticFile(filePath) { try { const response = await fetch(filePath); const blob = await response.blob(); const file = new File([blob], '职业类别表.xls', { type: blob.type }); const reader = new FileReader(); reader.onload = (e) => { const data = new Uint8Array(e.target.result); const workbook = XLSX.read(data, { type: 'array' }); // 只读取第一个工作表 const firstSheetName = workbook.SheetNames[0]; const worksheet = workbook.Sheets[firstSheetName]; allData = XLSX.utils.sheet_to_json(worksheet); // 初始化表格和合并信息 initializeTable(); calculateMergeInfo(allData); loadMoreRows(); // 监听滚动事件,在接近底部时加载更多数据 excelData.on('scroll', handleScroll); }; reader.readAsArrayBuffer(file); } catch (error) { console.error('加载文件失败:', error); } } loadStaticFile('/view/zhiyefenlei01_new.xls'); function initializeTable() { let jobHtml = "<table border='1' cellpadding='5' cellspacing='0'>"; // 构建表头 const headers = ['大分类', '中分类', '小分类', '代码', '细类', '职业类别']; jobHtml += `<thead><tr>${headers.map(h => `<th>${h}</th>`).join('')}</tr></thead>`; jobHtml += "<tbody>"; excelData.html(jobHtml + "</tbody></table>"); } function calculateMergeInfo(data) { mergeInfo = {}; currentMergeCounts = {}; data.forEach((row, rowIndex) => { const headers = ['大分类', '中分类', '小分类', '代码', '细类', '职业类别']; headers.forEach(header => { if (!mergeInfo[header]) { mergeInfo[header] = []; currentMergeCounts[header] = 0; } // 如果当前行缺少该字段,则认为它是前一行的延续 if (row[header] === undefined || row[header] === '') { currentMergeCounts[header]++; } else { // 如果有未处理的合并项,更新之前的 rowspan if (currentMergeCounts[header] > 0) { const lastIndex = rowIndex - currentMergeCounts[header] - 1; mergeInfo[header][lastIndex] = currentMergeCounts[header] + 1; currentMergeCounts[header] = 0; } mergeInfo[header].push(0); } }); // 处理最后一组合并项 if (rowIndex === data.length - 1) { Object.keys(currentMergeCounts).forEach(header => { if (currentMergeCounts[header] > 0) { const lastIndex = rowIndex - currentMergeCounts[header]; mergeInfo[header][lastIndex] = currentMergeCounts[header] + 1; } }); } }); } function generateMergedRow(row, rowIndex) { let rowHtml = "<tr>"; const headers = ['大分类', '中分类', '小分类', '代码', '细类', '职业类别']; headers.forEach(header => { if (row[header] !== undefined && row[header] !== '') { const rowspan = mergeInfo[header][rowIndex] || 1; rowHtml += `<td ${rowspan > 1 ? `rowspan="${rowspan}"` : ''}>${row[header]}</td>`; } else { // 跳过重复的单元格 rowHtml += ''; } }); rowHtml += "</tr>"; return rowHtml; } function loadMoreRows() { const dataSlice = allData.slice(loadedRows, loadedRows + pageSize); if (dataSlice.length === 0) return; let $tbody = $('#excel-data table tbody'); dataSlice.forEach((row, rowIndex) => { $tbody.append(generateMergedRow(row, loadedRows + rowIndex)); }); loadedRows += dataSlice.length; } function handleScroll() { const $container = $(this); const scrollTop = $container.scrollTop(); const scrollHeight = $container[0].scrollHeight; const clientHeight = $container.height(); // 当滚动到底部附近时加载更多数据 if (scrollTop + clientHeight >= scrollHeight - 50) { loadMoreRows(); } } </script> </body> </html>
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