android - Retrofit2.0访问一直404

api访问没有问题

Retrofit retrofit = new Retrofit.Builder()
                .baseUrl("http://服务器IP/SaveImg")
                .addConverterFactory(GsonConverterFactory.create())
                .client(new OkHttpClient())
                .build();
        Api imgService = retrofit.create(Api.class);

        Call> call = imgService.getImgUlrs("20151119");

        call.enqueue(new Callback>() {
            @Override
            public void onResponse(Response> response, Retrofit retrofit) {
                Log.d(TAG, response.code() + "");

            }

            @Override
            public void onFailure(Throwable t) {

            }
        });
    }

    public interface Api {
        @GET("/DouBanGirl")
        Call> getImgUlrs(@Query("date") String date);

    }

    public static class ImgUrl {
        public String date;
        public List ulrs;

        public ImgUrl(String date, List ulrs) {
            this.date = date;
            this.ulrs = ulrs;
        }
    }

为什么自己的访问一直是404？
小弟拜谢，这个问题困扰很久。