// 1.创建客户端对象 RestHighLevelClient client = new RestHighLevelClient( RestClient.builder(new HttpHost("localhost", 9200, "http")) );

（1）创建索引

// 创建索引 - 请求对象 CreateIndexRequest request = new CreateIndexRequest("user");

// 发送请求，获取响应 CreateIndexResponse response = client.indices().create(request, RequestOptions.DEFAULT); boolean acknowledged = response.isAcknowledged();

// 响应状态 System.out.println("操作状态 = " + acknowledged);

（2）查看索引

// 查询索引 - 请求对象 GetIndexRequest request = new GetIndexRequest("user"); // 发送请求，获取响应 GetIndexResponse response = client.indices().get(request, RequestOptions.DEFAULT); System.out.println("aliases:"+response.getAliases()); System.out.println("mappings:"+response.getMappings()); System.out.println("settings:"+response.getSettings());

（3）删除索引

// 删除索引 - 请求对象 DeleteIndexRequest request = new DeleteIndexRequest("user");

// 发送请求，获取响应 AcknowledgedResponse response = client.indices().delete(request, RequestOptions.DEFAULT);

// 操作结果 System.out.println("操作结果 ： " + response.isAcknowledged());