js导入excel

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>js导入excel</title>
</head>
<body>
<input type="file"onchange="importf(this)" />
<p id="excelContent"></p>
<script src="xlsx.full.min.js"></script>
<script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.js"></script>
<script src="https://cdn.bootcss.com/xlsx/0.11.5/xlsx.core.min.js"></script>
<script>

    var wb;//读取
    var rABS = false; 

    //开始导入
    function importf(obj) {
        if(!obj.files) {
            return;
        }
        var f = obj.files[0];
        var reader = new FileReader();
        reader.onload = function(e) {
            var data = e.target.result;
            if(rABS) {
                wb = XLSX.read(btoa(fixdata(data)), {//手动转化
                    type: 'base64'
                });
            } else {
                wb = XLSX.read(data, {
                    type: 'binary'
                });
            }
            /**
             * wb.SheetNames[0]是获取Sheets中第一个Sheet的名字
             * wb.Sheets[Sheet名]获取第一个Sheet的数据
             */
            var excelJson = XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]]);
            document.getElementById("excelContent").innerHTML= JSON.stringify( excelJson );
        };
        if(rABS) {
            reader.readAsArrayBuffer(f);
        } else {
            reader.readAsBinaryString(f);
        }
    }

    //文件流转BinaryString
    function fixdata(data) {
        var o = "",
                l = 0,
                w = 10240;
        for(; l < data.byteLength / w; ++l) o += String.fromCharCode.apply(null, new Uint8Array(data.slice(l * w, l * w + 

w)));
        o += String.fromCharCode.apply(null, new Uint8Array(data.slice(l * w)));
        return o;
    }
</script>
</body>
</html>