使用Retrofit2调用接口来保存和检索JWT Token

implementation 'com.squareup.retrofit2:retrofit:2.9.0'
implementation 'com.squareup.retrofit2:converter-gson:2.9.0'

public interface ApiService {
    @POST("login")
    Call<ResponseBody> login(@Body LoginRequest request);

    @GET("data")
    Call<DataResponse> getData(@Header("Authorization") String token);
}

Retrofit retrofit = new Retrofit.Builder()
    .baseUrl("https://api.example.com/")
    .addConverterFactory(GsonConverterFactory.create())
    .build();

ApiService apiService = retrofit.create(ApiService.class);

Call<ResponseBody> call = apiService.login(loginRequest);
call.enqueue(new Callback<ResponseBody>() {
    @Override
    public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
        if (response.isSuccessful()) {
            String token = response.body().string();
            // 将token保存到本地
        } else {
            // 处理登录失败的情况
        }
    }

    @Override
    public void onFailure(Call<ResponseBody> call, Throwable t) {
        // 处理网络请求失败的情况
    }
});

Call<DataResponse> call = apiService.getData("Bearer " + token);
call.enqueue(new Callback<DataResponse>() {
    @Override
    public void onResponse(Call<DataResponse> call, Response<DataResponse> response) {
        if (response.isSuccessful()) {
            DataResponse data = response.body();
            // 处理返回的数据
        } else {
            // 处理请求失败的情况
        }
    }

    @Override
    public void onFailure(Call<DataResponse> call, Throwable t) {
        // 处理网络请求失败的情况
    }
});