javascript导入excel文件

news2024/12/26 12:36:45

导入文件用到一个 xlsx.core.js 的包。

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script type="text/javascript" src="./xlsx.core.min.js"></script>
    <title>Document</title>
</head>

<body>
    <input type="file" id="file" style="display:none;" />
    <button onclick="importFile()">导入</button>
</body>
<script type="text/javascript" src="./index.js"></script>
</html>

隐藏 input 框，加一个 button 按钮可以方便的调节按钮的样式。

function importFile() {
    console.log('导入');
    document.getElementById('file').click();
}

document.getElementById('file').addEventListener('change', function (e) {
    let files = e.target.files;
    if (files.length == 0) return;
    let f = files[0];

    if (!/\.xlsx$/g.test(f.name)) {
        alert('仅支持读取xlsx格式！');
        return;
    }
    e.target.value = "" // 清空上一次上传的数据，防止第二次无法上传
    readWorkbookFromLocalFile(f, function (workbook) {
        readWorkbook(workbook);
    });
});

function readWorkbookFromLocalFile(file, callback) {
    let reader = new FileReader();
    reader.onload = function (e) {
        let data = e.target.result;
        let workbook = XLSX.read(data, { type: 'binary' });
        if (callback) callback(workbook);
    };
    reader.readAsBinaryString(file);
}

function readWorkbook(workbook) {
    let sheetNames = workbook.SheetNames; // 工作表名称集合
    console.log(sheetNames, 'sheetNames');
    let worksheet = workbook.Sheets[sheetNames[0]]; // 读取第一张sheet
    console.log(worksheet, 'worksheet');
    let json = XLSX.utils.sheet_to_json(worksheet);
    // let json = XLSX.utils.sheet_to_json(worksheet, { range: 1 }) // range: 1 可以设置是从第几行开始读，不设置从第一行开始读
    console.log(json, 'json');
}

文件信息。