JS 读取本地Excel文件

Posted 2020-10-23 4℃空间

　　首先我们先引用一个Excel的类库xlsx.full.min.js

中间处理：

\'use strict\';
var ExcelReader = {
    isFirstRead: true,
    fixdata: function (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;
    },
    read: function (file, callback, sheetIndex) {
        var self = this;
        var isABS = false;
        if (this.isFirstRead) {
            this.extendFileReader();
        }
        if (!file) {
            return;
        }
        if (!sheetIndex) {
            sheetIndex = 0;
        }
        var f;
        if (file.rawFile) {
            f = file.rawFile;//使用Kendo Ui的上传控件
        }
        else {
            f = file;
        }
        var reader = new FileReader();
        reader.onload = function (e) {
            var data;
            var wb;
            if (!isABS) {
                data = e.target.result;
            }
            else {
                data = e;
            }
            if (!isABS && !data.slice) {
                isABS = true;
                reader.readAsBinaryString(f);
                return;
            }
            if (!isABS) {
                wb = XLSX.read(btoa(self.fixdata(data)), {
                    type: \'base64\'
                });
            }
            else {
                wb = XLSX.read(btoa(data), {
                    type: \'base64\'
                });
            }
            callback(XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[sheetIndex]]));
        };
        reader.readAsArrayBuffer(f);
    },
    extendFileReader: function () {
        this.isFirstRead = false;
        if (!FileReader.prototype.readAsBinaryString) {
            FileReader.prototype.readAsBinaryString = function (fileData) {
                var binary = "";
                var self = this;
                var reader = new FileReader();
                reader.onload = function (e) {
                    var bytes = new Uint8Array(reader.result);
                    var length = bytes.byteLength;
                    for (var i = 0; i < length; i++) {
                        binary += String.fromCharCode(bytes[i]);
                    }
                    self.onload(binary);
                }
                reader.readAsArrayBuffer(fileData);
            }
        }
    }
}

　　

 

使用方式：

$("#ImportCtrl").kendoUpload({
                    select: function (e) {
                        $.each(e.files, function (index, value) {
                            ExcelReader.read(value, importFilesSuccess);
                        });
                    }
                }).data("kendoUpload");

var importFilesSuccess = function (d) {
//d:JSON DATA
}