关于ajax传递json数据类型不匹配

这是后端的

@CrossOrigin(origins ="*",maxAge = 3600)
@RestController
public class OrderController {

    @Autowired
    OrderService orderService;

    /**
     * 创建订单
     * @param createOrderReq
     * @return 订单号
     */
    @PostMapping("order/create")
    @ApiOperation("创建订单")
    public ApiRestResponse create(@RequestBody CreateOrderReq createOrderReq){
        String orderNo = orderService.create(createOrderReq);
        return ApiRestResponse.success(orderNo);
    }

这是类

public class CreateOrderReq {

    @NotNull
    private String receiverName;

    @NotNull
    private String receiverMobile;

    @NotNull
    private String receiverAddress;

    private Integer orderStatus;

    private Integer postage = 0;

    private Integer paymentType = 1;

前端
ajax传递的数据

        let name = $(".text1").text();
        let phone = $(".text2").text();
        let address = $(".text3").text();
        name = name.toString();
        phone = phone.toString();
        address = address.toString();
        if(name == "" || phone == "" || address == ""){
            layui.layer.msg("请填写信息");
        }else {
            $.ajax({
                url: "order/create",
                data:{"receiverName":name,"receiverMobile":phone,"receiverAddress":address},
                dataType: "json",
                type: "post",
                success: function (json) {
                    if(json.status == 10000){
                        layui.layer.msg("订单提交成功");
                        $("h1").text("订单详情");
                        $(".order-submit").css({"display": "none"});
                        $(".order-submit1").css({"display": "block"});
                        $(".order-submit2").css({"display": "block"});
                        $(".order-submit3").css({"display": "block"});
                        $(".receiver-\#").css({"display": "block"});
                    }else{
                        layui.layer.msg(json.msg);
                    }
                }
            })
        }

这是报错

客户端在提交的时候，设置一下 contentType: "application/json"

@PostMapping(value = "order/create“,produces = {"application/json;charset=UTF-8"})