一、创建springboot项目

• 创建springboot项目步骤参考此博文链接：https://wwwxz.blog.csdn.net/article/details/91977374

二、pom.xml文件引入相关maven依赖

• 引入elasticsearch依赖

  <!-- elasticsearch 依赖 -->
  <dependency><groupId>org.elasticsearch</groupId><artifactId>elasticsearch</artifactId><version>7.8.0</version>
  </dependency>
  <!-- elasticsearch 的客户端 -->
  <dependency><groupId>org.elasticsearch.client</groupId><artifactId>elasticsearch-rest-high-level-client</artifactId><version>7.8.0</version>
  </dependency>
  <!-- elasticsearch 依赖 2.x 的 log4j -->
  <dependency><groupId>org.apache.logging.log4j</groupId><artifactId>log4j-api</artifactId><version>2.8.2</version>
  </dependency>
  <dependency><groupId>org.apache.logging.log4j</groupId><artifactId>log4j-core</artifactId><version>2.8.2</version>
  </dependency>
  <dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>2.9.9</version>
  </dependency>
  <!-- junit 单元测试 -->
  <dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version>
  </dependency>
  

三、创建客户端对象

• 创建客户端对象代码示例

  package com.xz.esdemo.day1;import org.apache.http.HttpHost;
  import org.elasticsearch.client.RestClient;
  import org.elasticsearch.client.RestHighLevelClient;import java.io.IOException;/*** @description:  客户端对象* @author: xz*/
  public class EsClient {public static void main(String[] args) throws IOException {// 创建Elasticsearch客户端对象RestHighLevelClient client = new RestHighLevelClient(RestClient.builder(new HttpHost("localhost", 9200, "http")));// 关闭 Elasticsearch客户端连接client.close();}
  }
  

• 执行代码，查看控制台信息，如下图表示创建客户端对象ok
  
  注意：9200 端口为 Elasticsearch 的 Web 通信端口 ，localhost 为启动 Elasticsearch 服务的主机名。