Fastadmin大数据导出方法（自带的JS超过400条无法导出）

Fastadmin自带导出功能，数据超过400条后，导出功能容易失效。 在此记录，基于后台的导出方法~ 后台需要导出的控制器中添加导出方法

public function export()
{


    cookie('assets_export_time',time());

    if ($this->request->isPost()) {
        set_time_limit(0);
        ini_set('memory_limit','2048M');

        $search = $this->request->post('search');
        $ids = $this->request->post('ids');
        $filter = $this->request->post('filter');
        $op = $this->request->post('op');
        $columns = $this->request->post('columns');

        //优先获取一条数据
        $info  = $this->model->find();
        if(!$info) return $this->error('没有需要导出的数据');

        //获取表字段
        $columns = explode(',',$columns);
        $fields = implode(',',array_intersect($columns,array_keys($info->getData())));

        $excel = new Spreadsheet();

        $excel->getProperties()
            ->setCreator("文档编辑人")
            ->setLastModifiedBy("上次修改人")
            ->setTitle("文档标题")
            ->setSubject("Subject");
        $excel->getDefaultStyle()->getFont()->setName('Microsoft Yahei');
        $excel->getDefaultStyle()->getFont()->setSize(12);



        $excel->getDefaultStyle()->applyFromArray(
            array(
                'fill'      => array(
                    'type'  => Fill::FILL_SOLID,
                    'color' => array('rgb' => '000000')
                ),
                'font'      => array(
                    'color' => array('rgb' => "000000"),
                ),
                'alignment' => array(
                    'vertical'   => Alignment::VERTICAL_CENTER,
                    'horizontal' => Alignment::HORIZONTAL_CENTER,
                    'indent'     => 1
                ),
                'borders'   => array(
                    'allborders' => array('style' => Border::BORDER_THIN),
                )
            ));




        $worksheet = $excel->setActiveSheetIndex(0);
        $worksheet->setTitle('导出名称');

        $whereIds = $ids == 'all' ? '1=1' : ['id' => ['in', explode(',', $ids)]];
        $this->request->get(['search' => $search, 'ids' => $ids, 'filter' => $filter, 'op' => $op]);
        list($where, $sort, $order, $offset, $limit) = $this->buildparams();


        $line = 1;
        $list = [];
        $this->model
            ->field($fields)
            ->where($where)
            ->where($whereIds)
            ->chunk(100, function ($items) use (&$list, &$line, &$worksheet,&$columns) {
                $styleArray = array(
                    'font' => array(
                        'color' => array('rgb' => '000000'),
                        'size'  => 12,
                        'name'  => 'Verdana'
                    ));
                $list = $items = collection($items)->toArray();

                foreach ($items as $key => $v) {

                    foreach ($v as $k => $ele) {
                        $tmparray = explode("_text",$k);
                        if(count($tmparray)>1){
                            if(array_key_exists($tmparray[0],$items[$key])){
                                $items[$key][$tmparray[0]] = $ele;
                            }else if(array_key_exists($tmparray[0].'_id',$items[$key])){
                                $items[$key][$tmparray[0].'_id'] = $ele;
                            }else{

                                if(!in_array($k,$columns)){
                                    unset($items[$key][$k]);
                                }

                                continue;
                            }
                            unset($items[$key][$k]);
                        }

                        if(!in_array($k,$columns)){
                            unset($items[$key][$k]);
                        }

                    }

                }


                if($line === 1){
                    $first = array_keys($items[0]);
                    $col = 1;
                    foreach ($first as $index => $item) {
                        $worksheet->setCellValueByColumnAndRow($col, 1,__($item));
                        $col++;
                    }
                }

                foreach ($items as $index => $item) {
                    $line++;
                    $col = 1;
                    foreach ($item as $field => $value) {
                        $worksheet->setCellValueByColumnAndRow($col, $line, $value);
                        $worksheet->getStyleByColumnAndRow($col, $line)->getNumberFormat()->setFormatCode(NumberFormat::FORMAT_TEXT);
                        $worksheet->getCellByColumnAndRow($col, $line)->getStyle()->applyFromArray($styleArray);
                        $col++;
                    }

                }
            });

        $excel->createSheet();
        // Redirect output to a client’s web browser (Excel2007)
        $title = '导出名称';
        header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
        header('Content-Disposition: attachment;filename="' . $title . '.xlsx"');
        header('Cache-Control: max-age=0');
        // If you're serving to IE 9, then the following may be needed
        header('Cache-Control: max-age=1');

        // If you're serving to IE over SSL, then the following may be needed
        header('Expires: Mon, 26 Jul 1997 05:00:00 GMT'); // Date in the past
        header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT'); // always modified
        header('Cache-Control: cache, must-revalidate'); // HTTP/1.1
        header('Pragma: public'); // HTTP/1.0


        $objWriter = IOFactory::createWriter($excel, 'Xlsx');
        $objWriter->save('php://output');
        return;
    }
}

/** 自定义服务端导出  **/
var submitForm = function (ids, layero,index) {
    var options = table.bootstrapTable('getOptions');
    console.log(options);
    var columns = [];
    $.each(options.columns[0], function (i, j) {
        if (j.field && !j.checkbox && j.visible && j.field != 'operate') {
            columns.push(j.field);
        }
    });
    var search = options.queryParams({});
    $("input[name=search]", layero).val(options.searchText);
    $("input[name=ids]", layero).val(ids);
    $("input[name=filter]", layero).val(search.filter);
    $("input[name=op]", layero).val(search.op);
    $("input[name=columns]", layero).val(columns.join(','));
    $("form", layero).submit();

    $('.layui-layer-content > div',layero).html("正在导出，请稍后~");
    var old_export_time = $.cookie('assets_export_time');
    var load_index = Layer.load(0);
    var timeIndex = setInterval(function (){
        var export_time = $.cookie('assets_export_time');
        if(old_export_time  != export_time){
            clearInterval(timeIndex);
            Layer.close(index);
            Layer.close(load_index);
        }
    },1000);

};

var submitShow = function (){
    var ids = Table.api.selectedids(table);
    var page = table.bootstrapTable('getData');
    var all = table.bootstrapTable('getOptions').totalRows;
    console.log(ids, page, all);
    Layer.confirm("
请选择导出的选项
", {
        title: '导出数据',
        btn: ["选中项(" + ids.length + "条)", "本页(" + page.length + "条)", "全部(" + all + "条)"],
        success: function (layero, index) {
            $(".layui-layer-btn a", layero).addClass("layui-layer-btn0");
        }
        , yes: function (index, layero) {
            submitForm(ids.join(","), layero,index);
            return false;
        }
        ,
        btn2: function (index, layero) {
            var ids = [];
            $.each(page, function (i, j) {
                ids.push(j.id);
            });
            submitForm(ids.join(","), layero,index);
            return false;
        }
        ,
        btn3: function (index, layero) {
            submitForm("all", layero,index);
            return false;
        }
    })
}

//重新绑定导出点击事件，绑定自定义导出方法
$('div.export .dropdown-menu li').unbind().click(function (event){
    event.stopPropagation();
    submitShow();
    return false;
});

define(['jquery', 'bootstrap', 'backend', 'table', 'form','cookie'], function ($, undefined, Backend, Table, Form,undefined) {