vue 導入excel功能

chooseFile(){
    this.excelData = [];
    document.getElementById(this.fileId).value = null;
    this.imFile.click();
},
importf(obj) {
    let _this = this;
    this.file = this.$refs.imFile.files[0];
    // this.$refs.imFile.value = null;
    var rABS = false; //是否將文件讀取為二進制字符串
    var file = this.file;

    FileReader.prototype.readAsBinaryString = function(f) {
        var binary = "";
        var rABS = false; //是否將文件讀取為二進制字符串
        var pt = this;
        var workbook; //讀取完成的數(shù)據(jù)
        // var excelData;
        var reader = new FileReader();
        reader.onprogress = function(e) {
            let total = file.size;
            _this.progress = (e.loaded/total)*100;
            console.log( _this.progress);
        };
        reader.onload = function(e) {
            try {
                var bytes = new Uint8Array(reader.result);
                var length = bytes.byteLength;
                for(var i = 0; i < length; i++) {
                    binary += String.fromCharCode(bytes[i]);
                }
                if(rABS) {
                    workbook = XLSX.read(btoa(fixdata(binary)), { //手動轉(zhuǎn)化
                        type: 'base64'
                    });
                }else {
                    workbook = XLSX.read(binary, {
                        type: 'binary'
                    });
                }
                // excelData = [];
            } catch(e) {
                layer.toptip("文件類型不正確")
                return;
            }
            var fromTo = '';
            for (var sheet in workbook.Sheets) {
                if (workbook.Sheets.hasOwnProperty(sheet)) {
                    fromTo = workbook.Sheets[sheet]['!ref'];
                    _this.excelData = _this.excelData.concat(XLSX.utils.sheet_to_json(workbook.Sheets[sheet]));
                }
            }
            _this.$emit("fileUpload",_this.excelData)
        };

        reader.readAsArrayBuffer(f);

    }

    var reader = new FileReader();
    if(rABS) {
        reader.readAsArrayBuffer(file);
    }else {
        reader.readAsBinaryString(file);
    }

}