springboot form 提交集合 list

前端代码：

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);
        }

    })

　　

后台节后

@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";
    }