React下载，导入excel文件

import XLSX from 'xlsx';
    importfile(e){
        const { onChange } = this.props;
        if(!e.target.files) return ;
        const file=e.target.files[0];
        var daochu = this.daochu;
        const values = this.props.form.getFieldsValue()
        const reader=new FileReader();
        reader.readAsBinaryString(file);
        reader.onload=function(e){
            const data=this.result;
            const wb=XLSX.read(data, {
                    type: 'binary'
                })
            const params = XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]]);

            for(var i = 0; i<params.length; i++){
                params[i].Name = params[i].客户名称 ;
                delete params[i].客户名称 ;
                params[i].GenderName = params[i].性别 ;
                delete params[i].性别 ;
                params[i].Tel = params[i].联系电话 ;
                delete params[i].联系电话 ;
                params[i].WeChat = params[i].微信 ;
                delete params[i].微信 ;
                // params[i].qq = params[i].qq ;
                // delete params[i].qq ;
                params[i].StateValue = params[i].客户状态 ;
                delete params[i].客户状态 ;
                params[i].SourceValue = params[i].客户来源 ;
                delete params[i].客户来源 ;
                params[i].Address = params[i].通信地址 ;
                delete params[i].通信地址 ;
                params[i].ProvinceName = params[i].省 ;
                delete params[i].省 ;
                params[i].CityName = params[i].市 ;
                delete params[i].市 ;
                params[i].CountyName = params[i].区县 ;
                delete params[i].区县 ;
                params[i].EducationName = params[i].学历 ;
                delete params[i].学历 ;
                params[i].PoliticalOutlookName = params[i].政治面貌 ;
                delete params[i].政治面貌 ;
                params[i].CustomerLableValue = params[i].客户标签 ;
                delete params[i].客户标签 ;
                params[i].Remark = params[i].备注 ;
                delete params[i].备注 ;
            }

            request(`/api/C_Customer/ImportEnterpriseCustomer`, { method : 'POST' , body: params  })
                .then((req) => {
                    if(req.Success){
                        notification.success({
                            message: '导入成功',
                            description: req.Message
                        });
                        onChange(values)
                    }else{
                        if(req.ReturnData){
                            var data = [];
                            data = req.ReturnData;
                            Modal.error({
                                title: '导入失败',
                                content: req.Message,
                                okText:'下载文件',
                                maskClosable:true,
                                onOk: () => {
                                    daochu(data)
                                }
                            });
                        }else{
                            Modal.error({
                                title: '导入失败',
                                content: '必填数据不能为空',
                                okText:'知道了',
                                maskClosable:true,
                            });
                        }
                    }
                })  
        }
        this.input.value=null
    }
    daochu = (dataArr) => {
        const params = this.props.form.getFieldsValue();
        const param={
            ...params,
            StateKey:this.state.activeKey,
            SourceKey:params['SourceKey']==='null'?undefined:params['SourceKey']
        }
        const datas =  dataArr;
        const wopts = { bookType: 'xlsx', bookSST: false, type: 'binary' };//这里的数据是用来定义导出的格式类型
        const wb = { SheetNames: ['Sheet1'], Sheets: {}, Props: {} };
        const data=datas.map(item=>{
            return {
                '客户名称':item.Name,
                '联系电话':item.Tel,
                '客户标签':item.CustomerLableValue,
                '客户状态':item.StateValue,
                '距上次跟进(天)':item.OutTrackDay,
                '客户来源':item.SourceValue,
                '业务员':item.SalesmanName,
                '省份':item.ProvinceName,
                '城市':item.CityName,
                '区县':item.CountyName,
                '学历':item.EducationName,
                '性别':item.Gender == 0 ? '男':'女',
                '政治面貌':item.PoliticalOutlookName,
                'QQ':item.QQ,
                '类型':item.Type==1?'个人客户':'企业客户',
                '联系次数':item.ContactNum,
                '微信':item.WeChat,
                '错误信息': item.ErrorInfo
            }
        })
        wb.Sheets['Sheet1'] = XLSX.utils.json_to_sheet(data);//通过json_to_sheet转成单页(Sheet)数据
        this.saveAs(new Blob([this.s2ab(XLSX.write(wb, wopts))], { type: "application/octet-stream" }), "个人客户导出" + '.' + (wopts.bookType=="biff2"?"xls":wopts.bookType));
    }

    // 导出excel
    saveAs(obj, fileName){
        var tmpa = document.createElement("a");
        tmpa.download = fileName || "下载";
        tmpa.href = URL.createObjectURL(obj); //绑定a标签
        tmpa.click(); //模拟点击实现下载
        setTimeout(function () { //延时释放
            URL.revokeObjectURL(obj); //用URL.revokeObjectURL()来释放这个object URL
        }, 100);
    }

    s2ab(s) {
        if (typeof ArrayBuffer !== 'undefined') {
            var buf = new ArrayBuffer(s.length);
            var view = new Uint8Array(buf);
            for (var i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF;
            return buf;
        } else {
            var buf = new Array(s.length);
            for (var i = 0; i != s.length; ++i) buf[i] = s.charCodeAt(i) & 0xFF;
            return buf;
        }
    }