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js-xlsx 实现 Excel 文件读取

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js-xlsx 实现 Excel 文件读取

Zoe_z 2019-01-22 12:14:22



<!DOCTYPE html><html>

    <head>
        <meta charset="UTF-8">
        <title></title>
        <script src="http://oss.sheetjs.com/js-xlsx/xlsx.full.min.js"></script>
    </head>

    <body>
        <input type="file"onchange="importf(this)" />
        <div id="demo"></div>
        <script>
            /*
            FileReader共有4种读取方法:
            1.readAsArrayBuffer(file):将文件读取为ArrayBuffer。
            2.readAsBinaryString(file):将文件读取为二进制字符串
            3.readAsDataURL(file):将文件读取为Data URL
            4.readAsText(file, [encoding]):将文件读取为文本,encoding缺省值为'UTF-8'
                         */
            var wb;//读取完成的数据
            var rABS = false; //是否将文件读取为二进制字符串

            function importf(obj) {//导入
                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
                    document.getElementById("demo").innerHTML= JSON.stringify( XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]]) );
                };                if(rABS) {
                    reader.readAsArrayBuffer(f);
                } else {
                    reader.readAsBinaryString(f);
                }
            }            function fixdata(data) { //文件流转BinaryString
                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>


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