目前ElasticSearch版本最常用的应该时5.X 和6.X,这两个版本中都存在两种客户端:
简单总结:
1,如果服务端是5.6以下的,选择相同版本的TransportClient,避免一些API服务端不支持
2,如果服务端是5.6以上的,选择相同版本的RestClient
TransportClient起步:
5.6及之前的版本:
// on startup Client client = TransportClient.builder().build() .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("host1"), 9300)) .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("host2"), 9300)); // on shutdown client.close();
6.0及之后的版本
// on startup TransportClient client = new PreBuiltTransportClient(Settings.EMPTY) .addTransportAddress(new TransportAddress(InetAddress.getByName("host1"), 9300)) .addTransportAddress(new TransportAddress(InetAddress.getByName("host2"), 9300)); // on shutdown client.close();
TransportClient发送搜索请求:
SearchResponse response = client.prepareSearch("index1", "index2") .setTypes("type1", "type2") .setSearchType(SearchType.DFS_QUERY_THEN_FETCH) .setQuery(QueryBuilders.termQuery("multi", "test")) // Query .setPostFilter(QueryBuilders.rangeQuery("age").from(12).to(18)) // Filter .setFrom(0).setSize(60).setExplain(true) .get();