来自远程服务器的JSON响应

Question

我正在尝试通过调用 getSessionKey 方法创建一个以json格式从服务器返回响应的应用程序。响应应该是这三个参数。消息，状态和 sessionKey 格式

 {
    "message": "Successful",
    "status": 0,
    "sessionKey": "f85d1246c98f11e"
   }

这是java代码。

 private static String sessionKeyResponse(){
     try(CloseableHttpClient httpClient =HttpClientBuilder.create().build()) {

       String url="http://myurl.com:8080/getSessionKey";
       String body="";
       HttpPost request = new HttpPost(url);
       StringEntity params = new StringEntity(body);

       request.addHeader("content-type", "application/json");
       request.setEntity(params);
       HttpResponse result = httpClient.execute(request);
       String json = EntityUtils.toString(result.getEntity(),"UTF 8");
       com.google.gson.Gson gson = new com.google.gson.Gson();
       Response respuesta = gson.fromJson(json, Response.class);

       System.out.println(respuesta.getMessage());
       System.out.println(respuesta.getStatus());
       System.out.println(respuesta.getSessionKey());
    } catch (IOException ex) {
    }
   return "";
}

@JsonPropertyOrder({ "message","status","sessionKey" })
    public class Response{

        private String message;
        private String status;
        private String sessionKey;

        public String getMessage() {
            return message;
        }
        @JsonProperty("message")
        public void setMessage(String message) {
            this.message = message;
        }
        public String getStatus() {
            return status;
        }
        @JsonProperty("status")
        public void setStatus(String status) {
            this.status = status;
        }

        public String getSessionKey() {
            return sessionKey;
        }

    }

当我在位置1运行应用意外令牌END OF FILE时，这是我从服务器获得的响应。

任何回应都会受到影响。