进阶-第83__熟练掌握ES Java API_基于mget实现多辆汽车的配置与价格对比

 

场景，一般来说，我们都可以在一些汽车网站上，或者在混合销售多个品牌的汽车4S店的内部，都可以在系统里调出来多个汽车的信息，放在网页上，进行对比

 

mget，一次性将多个document的数据查询出来，放在一起显示，多个汽车的型号，一次性拿出了多辆汽车的信息

插入测试数据

PUT /car_shop/cars/2 {         "brand": "奔驰",         "name": "奔驰C200",         "price": 350000,         "produce_date": "2017-01-05" }

 

基于mget实现多辆汽车的配置与价格的查询

 

package com.es.core.senior; import java.net.InetAddress; import org.elasticsearch.action.get.GetResponse; import org.elasticsearch.action.get.MultiGetItemResponse; import org.elasticsearch.action.get.MultiGetResponse; import org.elasticsearch.client.transport.TransportClient; import org.elasticsearch.common.settings.Settings; import org.elasticsearch.common.transport.InetSocketTransportAddress; import org.elasticsearch.transport.client.PreBuiltTransportClient; public class MGetMultiCarInfoApp {     @SuppressWarnings({"resource", "unchecked"})     public static void main(String[] args) throws Exception {         Settings settings = Settings                 .builder()                 .put("cluster.name", "elasticsearch")                 .build();         TransportClient client = new PreBuiltTransportClient(settings)                 .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("localhost"), 9300));         MultiGetResponse multiGetResponse = client.prepareMultiGet()                 .add("car_shop", "cars", "1")                 .add("car_shop", "cars", "2")                 .get();         for (MultiGetItemResponse multiGetItemResponse :                 multiGetResponse) {             GetResponse response = multiGetItemResponse.getResponse();             if (response.isExists()) {                 System.out.println(response.getSourceAsString());             }         }         client.close();     } }