导出Excel

 <el-button type="success" icon="el-icon-download" @click="exportExcel"
            >导出为EXCEL
          </el-button>

window.location.href 

    window._api.adminPortalPmsSpuExportExcelByCon(this.query).then(res => {
                    if (res.code === 200) {
                        console.log("res.data.file_url",res.data.file_url)
                        window.location.href = res.data.file_url;
                    }
                })