1、第一步修改id 如下btn-myimport-file

<div class="panel panel-default panel-intro">
    {:build_heading()}

    <div class="panel-body">
        <div id="myTabContent" class="tab-content">
            <div class="tab-pane fade active in" id="one">
                <div class="widget-body no-padding">
                    <div id="toolbar" class="toolbar">
                        <a href="javascript:;" class="btn btn-primary btn-refresh" title="{:__('Refresh')}" ><i class="fa fa-refresh"></i> </a>
                        <a href="javascript:;" class="btn btn-success btn-add {:$auth->check('feedback/add')?'':'hide'}" title="{:__('Add')}" ><i class="fa fa-plus"></i> {:__('Add')}</a>
                        <a href="javascript:;" class="btn btn-success btn-edit btn-disabled disabled {:$auth->check('feedback/edit')?'':'hide'}" title="{:__('Edit')}" ><i class="fa fa-pencil"></i> {:__('Edit')}</a>
                        <a href="javascript:;" class="btn btn-danger btn-del btn-disabled disabled {:$auth->check('feedback/del')?'':'hide'}" title="{:__('Delete')}" ><i class="fa fa-trash"></i> {:__('Delete')}</a>
                        <a href="javascript:;" class="btn btn-danger btn-import {:$auth->check('feedback/import')?'':'hide'}" title="{:__('Import')}" id="btn-myimport-file" data-url="ajax/upload" data-mimetype="csv,xls,xlsx" data-multiple="false"><i class="fa fa-upload"></i> {:__('Import')}</a>

                        <div class="dropdown btn-group {:$auth->check('feedback/multi')?'':'hide'}">
                            <a class="btn btn-primary btn-more dropdown-toggle btn-disabled disabled" data-toggle="dropdown"><i class="fa fa-cog"></i> {:__('More')}</a>
                            <ul class="dropdown-menu text-left" role="menu">
                                <li><a class="btn btn-link btn-multi btn-disabled disabled" href="javascript:;" data-params="status=normal"><i class="fa fa-eye"></i> {:__('Set to normal')}</a></li>
                                <li><a class="btn btn-link btn-multi btn-disabled disabled" href="javascript:;" data-params="status=hidden"><i class="fa fa-eye-slash"></i> {:__('Set to hidden')}</a></li>
                            </ul>
                        </div>

                        
                    </div>
                    <table id="table" class="table table-striped table-bordered table-hover table-nowrap"
                           data-operate-edit="{:$auth->check('feedback/edit')}" 
                           data-operate-del="{:$auth->check('feedback/del')}" 
                           width="100%">
                    </table>
                </div>
            </div>

        </div>
    </div>
</div>

2、第二部public/assets/js/require-table.js

// 导入按钮事件
if ($(Table.config.importbtn, toolbar).size() > 0) {
    require(['upload'], function (Upload) {
        Upload.api.upload($(Table.config.importbtn, toolbar), function (data, ret) {

            if($(Table.config.importbtn) && $(Table.config.importbtn).attr('id') == 'btn-import-file'){

                Fast.api.ajax({
                    url: options.extend.import_url,
                    data: {file: data.url},
                }, function (data, ret) {
                    table.trigger("uncheckbox");
                    table.bootstrapTable('refresh');
                });

            }
        });
    });
}

3、第三步

// 为表格绑定事件
Table.api.bindevent(table);

var options = table.bootstrapTable('getOptions');
$("#btn-myimport-file").data("upload-success", function(data){
    Fast.api.ajax({
        url: options.extend.import_url,
        data: {file: data.url},
    }, function (data, ret) {
        console.log(ret);//导入接口返回的数据
        //上传结果回调:刷新table数据
        table.bootstrapTable('refresh');
    });
});