ElasticSearch: Low Level Client Get

In this tutorial I will show you how to put a json document into ElasticSearch. If you have not first connected to ElasticSearch please do so before continuing.

POM.xml

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.9.5</version>
</dependency>

Imports

import org.apache.http.HttpEntity;
import org.apache.http.nio.entity.NStringEntity;
import org.apache.http.entity.ContentType;
import org.elasticsearch.client.Response;
import org.apache.http.util.EntityUtils;

Now perform the GET request using the low level client.

ObjectMapper objectMapper = new ObjectMapper();
final String document = "{\"key\": 1 }";
final JsonNode document = objectMapper.readTree("{" +
   " \"query\": {" +
   " \"match\" : {" +
   " \"key\" : 1 }}}");
final HttpEntity httpEntity = new NStringEntity(document.toString(), ContentType.APPLICATION_JSON);
final Response response = restClient.performRequest("GET", "/indexName/indexType/_search", Collections.<String, String>emptyMap(), httpEntity);
 
//Now you can print the response
System.out.println(EntityUtils.toString(response.getEntity()));

//OR get the content
final JsonNode content = objectMapper.readTree(response.getEntity().getContent());
System.out.println(content);