使用RestHighLevelClient 连接带有用户名密码ES机器

HttpHost host=new HttpHost(“IP地址”, “端口号”, HttpHost.DEFAULT_SCHEME_NAME);

RestClientBuilder builder=RestClient.builder(host);

CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(“用户名”, “密码”));
builder.setHttpClientConfigCallback(f -> f.setDefaultCredentialsProvider(credentialsProvider));

RestHighLevelClient restClient = new RestHighLevelClient( builder);