优化if..else代码的两种方式

   String orderStatusDes;
        if (orderStatusCode == 1) {
            orderStatusDes = "订单未支付";
        } else if (orderStatusCode == 2) {
            orderStatusDes = "订单已支持";
        } else if (orderStatusCode == 3) {
            orderStatusDes = "已发货";
        } else if () {
            ....
        }    

public enum OrderStatusEnum {
    UNPAY(1, "订单未支持"), PAIDED(2, "订单已支付"), SENDED(3, "已发货");




    private int orderStatusCode;
    private String orderStatusDesc;

    OrderStatusEnum(int orderStatusCode, String orderStatusDesc) {
        this.orderStatusCode = orderStatusCode;
        this.orderStatusDesc = orderStatusDesc;
    }

    public String getDesc() {
        return orderStatusDesc;
    }

    static OrderStatusEnum of(int orderStatusCode) {
        for (OrderStatusEnum temp : OrderStatusEnum.values()) {
            if (temp.orderStatusCode == orderStatusCode) {
                return temp;
            }

        }
        return null;
    }
}

 // 通过订单状态码获取相应的订单描述 
 String orderStatusDesc = OrderStatusEnum.of(1).getDesc();