使用 fileReader 可以搞定
但实际工作中倾向于寻找库来解决， 如
https://github.com/SheetJS/sheetjs
一个小demo
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script src="./xlsx.core.min.js"></script>
<input type="file" id="excel-file">
<script>
const change = function (e) {
var files = e.target.files;
var fileReader = new FileReader();
fileReader.onload = function (ev) {
try {
var data = ev.target.result,
workbook = XLSX.read(data, {
type: 'binary'
}), // 以二进制流方式读取得到整份excel表格对象
persons = []; // 存储获取到的数据
} catch (e) {
console.log('文件类型不正确');
return;
}
// 表格的表格范围，可用于判断表头是否数量是否正确
var fromTo = '';
console.log(workbook)
// 遍历每张表读取
for (var sheet in workbook.Sheets) {
if (workbook.Sheets.hasOwnProperty(sheet)) {
fromTo = workbook.Sheets[sheet]['!ref'];
persons = persons.concat(XLSX.utils.sheet_to_json(workbook.Sheets[sheet]));
break; // 如果只取第一张表，就取消注释这行
}
}
console.log(persons);
};
// 以二进制方式打开文件
fileReader.readAsBinaryString(files[0]);
};
const excel = document.querySelector('#excel-file')
excel.addEventListener('change', change)
</script>
</body>
</html>
