可能是因为未在OkHttpClient中添加响应解析器的原因导致的。尝试将以下代码添加到OkHttpClient中，以使用Jackson解析响应体：

ObjectMapper mapper = new ObjectMapper().registerModule(new JavaTimeModule()); 
OkHttpClient client = new OkHttpClient.Builder() 
            .addInterceptor(new HttpLoggingInterceptor().setLevel(HttpLoggingInterceptor.Level.BODY)) 
            .readTimeout(timeout, TimeUnit.MILLISECONDS) 
            .writeTimeout(timeout, TimeUnit.MILLISECONDS) 
            .connectTimeout(timeout, TimeUnit.MILLISECONDS) 
            .addInterceptor(chain -> { 
                Request.Builder requestBuilder = chain.request().newBuilder() 
                        .addHeader("Content-Type", "application/json") 
                        .addHeader("Authorization", "Bearer " + accessToken); 
                return chain.proceed(requestBuilder.build()); 
            }) 
            .addNetworkInterceptor(new StethoInterceptor()) 
            .addInterceptor((Interceptor.Chain chain) -> { 
                Request request = chain.request(); 
                if (request.method().equals("GET")) { 
                    return chain.proceed(request); 
                } 
                Response response = chain.proceed(request); 
                if (response.body() == null) { 
                    return response; 
                } 
                String contentType = response.header("Content-Type"); 
                if (contentType == null) { 
                    return response; 
                } 
                if (!contentType.contains("application/json")) { 
                    return response; 
                } 
                ResponseBody wrappedBody = ResponseBody.create(response.body().contentType(), 
                        response.body().string()); 
                JsonNode root = mapper.readTree(wrappedBody.string()); 
                if (root.has("results")) { 
                    JsonNode results = root.get("results"); 
                    if (results.isArray() && results.size() > 0) { 
                        JsonNode firstResult = results.get(0); 
                        if (firstResult.has("job_stdout")) { 
                            String job_stdout = firstResult.get("job_stdout").asText(); 
                            if (job_stdout.endsWith("\n")) { 
                                job_stdout = job_stdout.substring(0, job_stdout.length() - 1); 
                                ((AppendableResponseBody) wrappedBody).append