function btnSubmit(data) {

    var url = $('form').attr("action");

    $.ajax({

        url: url,

        type: 'post',

        datatype: "json",

        contentType: "application/json; charset=utf-8",

        data:  JSON.stringify([{"name": "0a1", "number": "1", "price": "1", "price": "1"}]),

        success: function (s) {

            //询问框

            layer.alert('数据保存成功！', {

                icon: 1,

                skin: 'layer-ext-moon' //该皮肤由layer.seaning.com友情扩展。关于皮肤的扩展规则，去这里查阅

            }, function () {

                layer_close()

                windowReLoad();

            })

        },

        error: function (e) {

            alert(e.responseText);

        }

    })

@ResponseBody

    @PostMapping("/add")

    public String addBill(@RequestBody List< BillDetails> billDto) {

        System.out.println("orders size:" + billDto.size());

        /*entity.setIsdelete(false);

        entity.setId(0);

        billService.addBill(entity);*/

        return "admin/bill/add";

    }