一：启动ElasticSearch

ES后台启动

bi目录下执行如下命令

./elasticsearch -d

二：验证启动是否成功

浏览器输入，返回如下表示启动成功

三：添加es依赖

 <dependency><groupId>org.elasticsearch</groupId><artifactId>elasticsearch</artifactId><version>7.8.0</version></dependency><dependency><groupId>org.elasticsearch.client</groupId><artifactId>elasticsearch-rest-high-level-client</artifactId><version>7.8.0</version></dependency>

四：添加索引

public class ElasticsearchTest {public static void main(String[] args) throws IOException {RestHighLevelClient restHighLevelClient = new RestHighLevelClient(RestClient.builder(new HttpHost("localhost", 9200, "http")));try {//创建索引CreateIndexRequest request = new CreateIndexRequest("hello1");CreateIndexResponse createIndexResponse = restHighLevelClient.indices().create(request, RequestOptions.DEFAULT);//响应状态boolean acknowledged = createIndexResponse.isAcknowledged();System.out.println("索引操作" + acknowledged);} catch (Exception e) {e.printStackTrace();} finally {restHighLevelClient.close();}}
}

五：用postman查询索引创建情况

可以看到创建hello1索引成功