Java elasticsearch

1. Cree dependencias con maven, pom.xml: basado en elasticsearch7.9.1

    <dependencias>

        <dependencia>

          <groupId> junit </groupId>

          <artifactId> junit </artifactId>

          <version> 4.12 </version>

          <scope> probar </scope>

        </dependencia>

    

        <dependencia>

    <groupId> org.elasticsearch.client </groupId>

    <artifactId> elasticsearch-rest-high-level-client </artifactId>

    <version> 7.9.1 </version>

 </dependencia>

 

 <dependencia>

    <groupId> org.apache.httpcomponents </groupId>

    <artifactId> httpcore </artifactId>

    <version> 4.4.13 </version>

</dependencia>

<! - https://mvnrepository.com/artifact/commons-logging/commons-logging ->

<dependencia>

    <groupId> commons-logging </groupId>

    <artifactId> commons-logging </artifactId>

    <version> 1.2 </version>

</dependencia>

<! - https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core ->

<dependencia>

    <groupId> com.fasterxml.jackson.core </groupId>

    <artifactId> jackson-core </artifactId>

    <version> 2.11.2 </version>

</dependencia>

<! - https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind ->

<dependencia>

    <groupId> com.fasterxml.jackson.core </groupId>

    <artifactId> jackson-databind </artifactId>

    <version> 2.11.2 </version>

</dependencia>

<! - https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-annotations ->

<dependencia>

    <groupId> com.fasterxml.jackson.core </groupId>

    <artifactId> anotaciones-jackson </artifactId>

    <version> 2.11.2 </version>

</dependencia>

<! - https://mvnrepository.com/artifact/joda-time/joda-time ->

<dependencia>

    <groupId> joda-time </groupId>

    <artifactId> joda-time </artifactId>

    <version> 2.10.6 </version>

</dependencia>

<! - https://mvnrepository.com/artifact/com.carrotsearch/hppc ->

<dependencia>

    <groupId> com.carrotsearch </groupId>

    <artifactId> hppc </artifactId>

    <version> 0.8.2 </version>

</dependencia>

  </dependencias> 

2.Crear índice, código principal:

importar java.util. *; 
import org.apache.http.HttpHost; 
import org.elasticsearch.client.RestHighLevelClient; 
import org.elasticsearch.client.RestClient; 
import org.elasticsearch.client.RestClientBuilder; 
import org.elasticsearch.client.RequestOptions; 
import org.elasticsearch.action.index.IndexResponse; 
import org.elasticsearch.action.index.IndexRequest; 
importar org.elasticsearch.common.xcontent.XContentBuilder;  
prueba de clase pública {   
  public static void main (String [] args) { 
    HttpHost h1 = new HttpHost ("106.13.64.228", 9200, "http"); 
      RestClientBuilder r2 = RestClient.builder (h1); 
      // 创建 连接
      Cliente RestHighLevelClient = new RestHighLevelClient (r2);  
      // 创建 数据
      Map <String, Object> doc1 = new HashMap <String, Object> (); 
      doc1.put ("nombre_pantalla", "d_bharv1"); 
      doc1.put ("cuenta_seguidores", 2000); 
      doc1.put ("crear_en", "20-09-2015"); 
      try { 
          IndexRequest indexRequest = new IndexRequest ("testindex"). id ("1"). source (doc1); 
          RequestOptions requestOptions = RequestOptions.DEFAULT; 
         // 创建 index 
       IndexResponse indexResponse = client.index (indexRequest, requestOptions); 
       System.out.println (indexResponse); 
      } captura (Excepción ex) { 
         ex.printStackTrace (); 
     } 
  }
}