elasticsearch尝试访问Elastic Search get时使用java获取空响应

Question

遵循Elastic Search的文档，我们能够为其API设置Java环境。 但当尝试从名为twitter的索引访问时，在名为tweet的类型下，id值为1，响应为空，控制台中没有错误

上面的代码

Settings settings = Settings.builder()
                .put("cluster.name", "elasticsearch").build();

        TransportClient client = new PreBuiltTransportClient(settings)
                .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("localhost"), 9300));

        GetResponse response = client.prepareGet("twitter", "tweet", "2").get();
        System.out.println(response.getFields());

        client.close();

Kibana控制台上的数据

{
        "_index": "twitter",
        "_type": "tweet",
        "_id": "2",
        "_score": 1,
        "_source": {
          "user": "Rahul",
          "post_date": "2009-11-15T14:12:12",
          "message": "trying out Elasticsearch"
        }
      },
      {
        "_index": "twitter",
        "_type": "tweet",
        "_id": "1",
        "_score": 1,
        "_source": {
          "user": "kimchy",
          "post_date": "2009-11-15T14:12:12",
          "message": "trying out Elasticsearch"
        }
      }

Answer 1

请尝试一下这样的东西，希望能有所帮助

RestClient restClient = RestClient.builder(
                new HttpHost("localhost", 9200, "http")).build();

        Response response = restClient.performRequest("GET", "/twitter/_search",
               Collections.singletonMap("pretty", "true"));


/*
        JsonObject user = new JsonObject();
        user.addProperty("user","Yash");
        user.addProperty("post_date","2009-11-15T14:12:12");
        user.addProperty("message","Checking json");

        HttpEntity entity = new NStringEntity(user.toString());

        Response indexResponse = restClient.performRequest(
                "PUT",
                "/twitter/tweet/3",
                Collections.<String, String>emptyMap(),
                entity);
*/





        System.out.println(EntityUtils.toString(response.getEntity()));

        restClient.close();

Answer 2

确保您使用的是HTTP，而不是HTTPs——如果您发出简单的纯文本HTTP请求，服务器可能会挂断您的连接