遍历form查询条件

 <form id="fm_s">

</form>

$("#btnExport").click(function(){
     var queryParam = getFormJson($("#fm_s")[0]);
     var url = "<%=request.getContextPath()%>/orderFinact/exportOrderFinkacnt?"+$.param(queryParam);
     window.open(url);
    });

 function getFormJson(form) {
   var o = {};
   var a = $(form).serializeArray();
   $.each(a, function() {
    if (o[this.name] !== undefined) {
     if (!o[this.name].push) {
      o[this.name] = [ o[this.name] ];
     }
     o[this.name].push(this.value || '');
    } else {
     o[this.name] = this.value || '';
    }
   });
   return o;
  }