var postDownLoadFile = function (options) {

     var config = $.extend(true, {method: 'post'}, options);

     var $iframe = $('<iframe id="down-file-iframe" />');

     var $form = $('<form target="down-file-iframe" method="' + config.method + '" />');

     $form.attr('action', config.url);

     for (var key in config.data) {

         $form.append('<input type="hidden" name="' + key + '" value="' + config.data[key] + '" />');

     }

     $iframe.append($form);

     $(document.body).append($iframe);

     $form[0].submit();

     $iframe.remove();

 }

 //导出

 $("#btnExport_year").on('click',

     function () {

         var param = {};

         postDownLoadFile({

             url: path + '/monthlyCollection/exportExcelDoc.json',

             data: param,

             method: 'post'

         });

 });