一、摘要

在上篇文章中，我們?cè)敿?xì)地介紹了如何在 ES 中精準(zhǔn)地實(shí)現(xiàn)嵌套json對(duì)象查詢？

那么問題來了，我們?nèi)绾卧诤蠖送ㄟ^技術(shù)方式快速地實(shí)現(xiàn) es 中內(nèi)嵌對(duì)象的數(shù)據(jù)查詢呢？

為了方便更容易掌握技術(shù)，本文主要以上篇文章中介紹的通過商品找訂單為案例，利用 SpringBoot 整合 ES 實(shí)現(xiàn)這個(gè)業(yè)務(wù)需求，向大家介紹具體的技術(shù)實(shí)踐方案，存入es中的json數(shù)據(jù)結(jié)構(gòu)如下：

{ “orderId”:”1″, “orderNo”:”123456″, “orderUserName”:”張三”, “orderItems”:[ { “orderItemId”:”12234″, “orderId”:”1″, “productName”:”火腿腸”, “brandName”:”雙匯”, “sellPrice”:”28″ }, { “orderItemId”:”12235″, “orderId”:”1″, “productName”:”果凍”, “brandName”:”匯源”, “sellPrice”:”12″ } ]}

廢話也不多說了，直接上代碼！

二、項(xiàng)目實(shí)踐

2.1、添加依賴

在SpringBoot項(xiàng)目中，添加rest-high-level-client客戶端，方便與 ES 服務(wù)器連接通信，在這里需要注意一下，推薦客戶端的版本與 ES 服務(wù)器的版本號(hào)一致，不然會(huì)出現(xiàn)接口請(qǐng)求錯(cuò)誤等異常！

小編本次安裝的ES服務(wù)端版本號(hào)為6.8.2，因此客戶端也保持6.8.2，與之一致！

org.elasticsearch elasticsearch 6.8.2 org.elasticsearch.client elasticsearch-rest-client 6.8.2 org.elasticsearch.client elasticsearch-rest-high-level-client 6.8.2

2.2、配置 es 客戶端

為了更加方便的使用 es，我們可以將其各個(gè)配置類進(jìn)行封裝，方便后續(xù)進(jìn)行維護(hù)。

• 在application.properties配置文件中，定義 es 配置連接地址

# 設(shè)置es參數(shù)elasticsearch.scheme=httpelasticsearch.address=127.0.0.1:9200elasticsearch.userName=elasticsearch.userPwd=elasticsearch.socketTimeout=5000elasticsearch.connectTimeout=5000elasticsearch.connectionRequestTimeout=5000

• 創(chuàng)建ElasticSearch配置類，方便SpringBoot啟動(dòng)時(shí)注入

import org.apache.http.HttpHost;import org.apache.http.auth.AuthScope;import org.apache.http.auth.UsernamePasswordCredentials;import org.apache.http.client.CredentialsProvider;import org.apache.http.impl.client.BasicCredentialsProvider;import org.elasticsearch.client.RestClient;import org.elasticsearch.client.RestClientBuilder;import org.elasticsearch.client.RestHighLevelClient;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Value;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import java.util.Arrays;import java.util.Objects;@Configurationpublic class ElasticSearchConfiguration { private static final Logger log = LoggerFactory.getLogger(ElasticSearchConfiguration.class); private static final int ADDRESS_LENGTH = 2; @Value(“${elasticsearch.scheme:http}”) private String scheme; @Value(“${elasticsearch.address}”) private String address; @Value(“${elasticsearch.userName}”) private String userName; @Value(“${elasticsearch.userPwd}”) private String userPwd; @Value(“${elasticsearch.socketTimeout:5000}”) private Integer socketTimeout; @Value(“${elasticsearch.connectTimeout:5000}”) private Integer connectTimeout; @Value(“${elasticsearch.connectionRequestTimeout:5000}”) private Integer connectionRequestTimeout; /** * 初始化客戶端 * @return */ @Bean(name = “restHighLevelClient”) public RestHighLevelClient restClientBuilder() { HttpHost[] hosts = Arrays.stream(address.split(“,”)) .map(this::buildHttpHost) .filter(Objects::nonNull) .toArray(HttpHost[]::new); RestClientBuilder restClientBuilder = RestClient.builder(hosts); // 異步參數(shù)配置 restClientBuilder.setHttpClientConfigCallback(httpClientBuilder -> { httpClientBuilder.setDefaultCredentialsProvider(buildCredentialsProvider()); return httpClientBuilder; }); // 異步連接延時(shí)配置 restClientBuilder.setRequestConfigCallback(requestConfigBuilder -> { requestConfigBuilder.setConnectionRequestTimeout(connectionRequestTimeout); requestConfigBuilder.setSocketTimeout(socketTimeout); requestConfigBuilder.setConnectTimeout(connectTimeout); return requestConfigBuilder; }); return new RestHighLevelClient(restClientBuilder); } /** * 根據(jù)配置創(chuàng)建HttpHost * @param s * @return */ private HttpHost buildHttpHost(String s) { String[] address = s.split(“:”); if (address.length == ADDRESS_LENGTH) { String ip = address[0]; int port = Integer.parseInt(address[1]); return new HttpHost(ip, port, scheme); } else { return null; } } /** * 構(gòu)建認(rèn)證服務(wù) * @return */ private CredentialsProvider buildCredentialsProvider(){ final CredentialsProvider credentialsProvider = new BasicCredentialsProvider(); credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(userName, userPwd)); return credentialsProvider; }}

• 封裝ElasticSearch客戶端服務(wù)類，方便公共調(diào)用處理

import com.fasterxml.jackson.databind.ObjectMapper;import org.example.es.exception.CommonException;import org.apache.commons.lang3.StringUtils;import org.elasticsearch.action.admin.indices.alias.get.GetAliasesRequest;import org.elasticsearch.action.admin.indices.create.CreateIndexRequest;import org.elasticsearch.action.admin.indices.create.CreateIndexResponse;import org.elasticsearch.action.admin.indices.delete.DeleteIndexRequest;import org.elasticsearch.action.admin.indices.get.GetIndexRequest;import org.elasticsearch.action.admin.indices.get.GetIndexResponse;import org.elasticsearch.action.admin.indices.mapping.get.GetMappingsRequest;import org.elasticsearch.action.admin.indices.mapping.get.GetMappingsResponse;import org.elasticsearch.action.admin.indices.mapping.put.PutMappingRequest;import org.elasticsearch.action.delete.DeleteRequest;import org.elasticsearch.action.delete.DeleteResponse;import org.elasticsearch.action.get.GetRequest;import org.elasticsearch.action.get.GetResponse;import org.elasticsearch.action.index.IndexRequest;import org.elasticsearch.action.index.IndexResponse;import org.elasticsearch.action.search.SearchRequest;import org.elasticsearch.action.search.SearchResponse;import org.elasticsearch.action.support.master.AcknowledgedResponse;import org.elasticsearch.action.update.UpdateRequest;import org.elasticsearch.action.update.UpdateResponse;import org.elasticsearch.client.GetAliasesResponse;import org.elasticsearch.client.RequestOptions;import org.elasticsearch.client.RestHighLevelClient;import org.elasticsearch.common.settings.Settings;import org.elasticsearch.common.xcontent.XContentType;import org.elasticsearch.search.builder.SearchSourceBuilder;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Component;import java.io.IOException;import java.util.Collections;import java.util.Map;import java.util.Set;@Componentpublic class ElasticSearchClient { private static final Logger log = LoggerFactory.getLogger(ElasticSearchClient.class); private static final ObjectMapper objectMapper = new ObjectMapper(); @Autowired private RestHighLevelClient client; /** * 查詢?nèi)?span id="zcxvfzm" class="wpcom_tag_link">索引 * @return */ public Set getAlias(){ try { GetAliasesRequest request = new GetAliasesRequest(); GetAliasesResponse response = client.indices().getAlias(request, RequestOptions.DEFAULT); return response.getAliases().keySet(); } catch (IOException e) { log.error(“向es發(fā)起查詢?nèi)克饕畔⒄?qǐng)求失敗”, e); } return Collections.emptySet(); } /** * 檢查索引是否存在 * @param indexName * @return */ public boolean existsIndex(String indexName){ try { // 創(chuàng)建請(qǐng)求 GetIndexRequest request = new GetIndexRequest().indices(indexName); // 執(zhí)行請(qǐng)求,獲取響應(yīng) boolean response = client.indices().exists(request, RequestOptions.DEFAULT); return response; } catch (Exception e) { log.error(“向es發(fā)起查詢索引是否存在請(qǐng)求失敗，請(qǐng)求參數(shù)：” + indexName, e); } return false; } /** * 查詢索引 * @param indexName * @return */ public String getIndex(String indexName){ try { // 創(chuàng)建請(qǐng)求 GetIndexRequest request = new GetIndexRequest().indices(indexName); // 執(zhí)行請(qǐng)求,獲取響應(yīng) GetIndexResponse response = client.indices().get(request, RequestOptions.DEFAULT); return response.toString(); } catch (Exception e) { log.error(“向es發(fā)起查詢索引請(qǐng)求失敗，請(qǐng)求參數(shù)：” + indexName, e); } return StringUtils.EMPTY; } /** * 創(chuàng)建索引 * @param indexName * @param mapping * @return */ public void createIndex(String indexName, Map mapping){ try { CreateIndexRequest request = new CreateIndexRequest(); //索引名稱 request.index(indexName); //索引配置 Settings settings = Settings.builder() .put(“index.number_of_shards”, 3) .put(“index.number_of_replicas”, 1) .put(“index.max_inner_result_window”, 5000) .build(); request.settings(settings); //索引結(jié)構(gòu) request.mapping(“_doc”,mapping); //執(zhí)行請(qǐng)求,獲取響應(yīng) CreateIndexResponse response = client.indices().create(request, RequestOptions.DEFAULT); if(!response.isAcknowledged()){ throw new CommonException(“向es發(fā)起創(chuàng)建索引請(qǐng)求失敗”); } log.info(“向es發(fā)起創(chuàng)建索引請(qǐng)求成功，返回參數(shù)：{}”, response.index()); } catch (Exception e) { log.error(“向es發(fā)起創(chuàng)建索引請(qǐng)求失敗，請(qǐng)求參數(shù)：” + indexName, e); throw new CommonException(“向es發(fā)起創(chuàng)建索引請(qǐng)求失敗”); } } /** * 刪除索引 * @param indexName * @return */ public void deleteIndex(String indexName){ try { DeleteIndexRequest request = new DeleteIndexRequest(indexName); AcknowledgedResponse response = client.indices().delete(request, RequestOptions.DEFAULT); if(!response.isAcknowledged()){ throw new CommonException(“向es發(fā)起刪除索引請(qǐng)求失敗”); } log.info(“向es發(fā)起刪除索引請(qǐng)求成功，請(qǐng)求參數(shù)：{}”, indexName); } catch (Exception e) { log.error(“向es發(fā)起刪除索引請(qǐng)求失敗，請(qǐng)求參數(shù)：” + indexName, e); throw new CommonException(“向es發(fā)起刪除索引請(qǐng)求失敗”); } } /** * 查詢索引映射字段 * @param indexName * @return */ public String getMapping(String indexName){ try { GetMappingsRequest request = new GetMappingsRequest().indices(indexName).types(“_doc”); GetMappingsResponse response = client.indices().getMapping(request, RequestOptions.DEFAULT); return response.toString(); } catch (Exception e) { log.error(“向es發(fā)起查詢索引映射字段請(qǐng)求失敗，請(qǐng)求參數(shù)：” + indexName, e); } return StringUtils.EMPTY; } /** * 添加索引映射字段 * @param indexName * @return */ public void addMapping(String indexName, Map mapping){ try { PutMappingRequest request = new PutMappingRequest(); request.indices(indexName); request.type(“_doc”); //添加字段 request.source(mapping); AcknowledgedResponse response = client.indices().putMapping(request, RequestOptions.DEFAULT); if(!response.isAcknowledged()){ throw new CommonException(“向es發(fā)起添加索引映射字段請(qǐng)求失敗”); } log.info(“向es發(fā)起添加索引映射字段請(qǐng)求成功，請(qǐng)求參數(shù)：{}”, toJson(request)); } catch (Exception e) { log.error(“向es發(fā)起添加索引映射字段請(qǐng)求失敗，請(qǐng)求參數(shù)：” + indexName, e); throw new CommonException(“向es發(fā)起添加索引映射字段請(qǐng)求失敗”); } } /** * 向索引中添加文檔 * @param indexName * @param id * @param obj */ public void addDocument(String indexName, String id, Object obj){ try { //向索引中添加文檔 IndexRequest request = new IndexRequest(); // 外層參數(shù) request.id(id); request.index(indexName); request.type(“_doc”); // 存入對(duì)象 request.source(toJson(obj), XContentType.JSON); // 發(fā)送請(qǐng)求 IndexResponse response = client.index(request, RequestOptions.DEFAULT); if(response.status().getStatus() >= 400){ log.warn(“向es發(fā)起添加文檔數(shù)據(jù)請(qǐng)求失敗，請(qǐng)求參數(shù)：{}，返回參數(shù)：{}”, request.toString(), response.toString()); throw new CommonException(“向es發(fā)起添加文檔數(shù)據(jù)請(qǐng)求失敗”); } } catch (Exception e) { log.error(“向es發(fā)起添加文檔數(shù)據(jù)請(qǐng)求失敗，請(qǐng)求參數(shù)：” + indexName, e); throw new CommonException(“向es發(fā)起添加文檔數(shù)據(jù)請(qǐng)求失敗”); } } /** * 修改索引中的文檔數(shù)據(jù) * @param indexName * @param id * @param obj */ public void updateDocument(String indexName, String id, Map obj){ try { //修改索引中的文檔數(shù)據(jù) UpdateRequest request = new UpdateRequest(); // 外層參數(shù) request.id(id); request.index(indexName); request.type(“_doc”); // 存入對(duì)象 request.doc(obj); request.doc(toJson(obj), XContentType.JSON); // 發(fā)送請(qǐng)求 UpdateResponse response = client.update(request, RequestOptions.DEFAULT); if(response.status().getStatus() >= 400){ log.warn(“向es發(fā)起修改文檔數(shù)據(jù)請(qǐng)求失敗，請(qǐng)求參數(shù)：{}，返回參數(shù)：{}”, request.toString(), response.toString()); throw new CommonException(“向es發(fā)起修改文檔數(shù)據(jù)請(qǐng)求失敗”); } } catch (Exception e) { log.error(“向es發(fā)起修改文檔數(shù)據(jù)請(qǐng)求失敗，請(qǐng)求參數(shù)：” + indexName, e); throw new CommonException(“向es發(fā)起修改文檔數(shù)據(jù)請(qǐng)求失敗”); } } /** * 刪除索引中的文檔數(shù)據(jù) * @param indexName * @param id */ public void deleteDocument(String indexName, String id){ try { //刪除索引中的文檔數(shù)據(jù) DeleteRequest request = new DeleteRequest(); // 外層參數(shù) request.id(id); request.index(indexName); request.type(“_doc”); // 發(fā)送請(qǐng)求 DeleteResponse response = client.delete(request, RequestOptions.DEFAULT); if(response.status().getStatus() >= 400){ log.warn(“向es發(fā)起刪除文檔數(shù)據(jù)請(qǐng)求失敗，請(qǐng)求參數(shù)：{}，返回參數(shù)：{}”, request.toString(), response.toString()); throw new CommonException(“向es發(fā)起刪除文檔數(shù)據(jù)請(qǐng)求失敗”); } } catch (Exception e) { log.error(“向es發(fā)起刪除文檔數(shù)據(jù)請(qǐng)求失敗，請(qǐng)求參數(shù)：” + indexName, e); throw new CommonException(“向es發(fā)起刪除文檔數(shù)據(jù)請(qǐng)求失敗”); } } /** * 查詢索引中的文檔數(shù)據(jù) * @param indexName * @param id */ public String getDocumentById(String indexName, String id){ try { GetRequest request = new GetRequest(); // 外層參數(shù) request.id(id); request.index(indexName); request.type(“_doc”); // 發(fā)送請(qǐng)求 GetResponse response = client.get(request, RequestOptions.DEFAULT); response.getSourceAsString(); } catch (Exception e) { log.error(“向es發(fā)起查詢文檔數(shù)據(jù)請(qǐng)求失敗，請(qǐng)求參數(shù)：” + indexName, e); } return StringUtils.EMPTY; } /** * 索引高級(jí)查詢 * @param indexName * @param source * @return */ public SearchResponse searchDocument(String indexName, SearchSourceBuilder source){ //搜索 SearchRequest searchRequest = new SearchRequest(); searchRequest.indices(indexName); searchRequest.source(source); try { // 執(zhí)行請(qǐng)求 SearchResponse response = client.search(searchRequest, RequestOptions.DEFAULT); return response; } catch (Exception e) { log.warn(“向es發(fā)起查詢文檔數(shù)據(jù)請(qǐng)求失敗，請(qǐng)求參數(shù)：” + searchRequest.toString(), e); } return null; } /** * 將對(duì)象格式化成json，并保持原字段類型輸出 * @param object * @return */ private String toJson(Object object) { try { return objectMapper.writeValueAsString(object); } catch (Exception e) { throw new CommonException(e); } }}

2.3、初始化索引結(jié)構(gòu)

在使用 es 對(duì)訂單進(jìn)行查詢搜索時(shí)，我們需要先定義好對(duì)應(yīng)的訂單索引結(jié)構(gòu)，內(nèi)容如下：

@ActiveProfiles(“dev”)@RunWith(SpringRunner.class)@SpringBootTestpublic class OrderIndexServiceJunit { @Autowired private ElasticSearchClient elasticSearchClient; /** * 初始化索引結(jié)構(gòu) * * @return */ @Test public void initIndex(){ String indexName = “orderIndex-2022-07”; // 創(chuàng)建請(qǐng)求 boolean existsIndex = elasticSearchClient.existsIndex(indexName); if (!existsIndex) { Map properties = buildMapping(); elasticSearchClient.createIndex(indexName, properties); } } /** * 構(gòu)建索引結(jié)構(gòu) * * @return */ private Map buildMapping() { Map properties = new HashMap(); //訂單id 唯一鍵ID properties.put(“orderId”, ImmutableBiMap.of(“type”, “keyword”)); //訂單號(hào) properties.put(“orderNo”, ImmutableBiMap.of(“type”, “keyword”)); //客戶姓名 properties.put(“orderUserName”, ImmutableBiMap.of(“type”, “text”)); //訂單項(xiàng) Map orderItems = new HashMap(); //訂單項(xiàng)ID orderItems.put(“orderItemId”, ImmutableBiMap.of(“type”, “keyword”)); //產(chǎn)品名稱 orderItems.put(“productName”, ImmutableBiMap.of(“type”, “text”)); //品牌名稱 orderItems.put(“brandName”, ImmutableBiMap.of(“type”, “text”)); //銷售金額,單位分*100 orderItems.put(“sellPrice”, ImmutableBiMap.of(“type”, “integer”)); properties.put(“orderItems”, ImmutableBiMap.of(“type”, “nested”, “properties”, orderItems)); //文檔結(jié)構(gòu)映射 Map mapping = new HashMap(); mapping.put(“properties”, properties); return mapping; }}

2.4、向 es 中同步文檔數(shù)據(jù)

索引結(jié)構(gòu)創(chuàng)建好之后，我們需要將支持 es 搜索的訂單數(shù)據(jù)同步進(jìn)去。

將指定的訂單 ID 從數(shù)據(jù)庫查詢出來，并封裝成 es 訂單數(shù)據(jù)結(jié)構(gòu)，保存到 es 中！

@ActiveProfiles(“dev”)@RunWith(SpringRunner.class)@SpringBootTestpublic class OrderIndexServiceJunit { @Autowired private ElasticSearchClient elasticSearchClient; /** * 保存訂單到ES中 * @param request */ @Test public void saveDocument(){ String indexName = “orderIndex-2022-07”; //從數(shù)據(jù)庫查詢最新訂單數(shù)據(jù)，并封裝成對(duì)應(yīng)的es訂單結(jié)構(gòu) String orderId = “202202020202”; OrderIndexDocDTO indexDocDTO = buildOrderIndexDocDTO(orderId); //保存數(shù)據(jù)到ES中 elasticSearchClient.addDocument(indexName, indexDocDTO.getOrderId(), indexDocDTO); }}

2.5、內(nèi)嵌對(duì)象查詢

內(nèi)嵌對(duì)象查詢分兩種形式，比如，第一種通過商品、品牌、價(jià)格等條件，分頁查詢訂單數(shù)據(jù)；第二種是通過訂單ID、商品、品牌、價(jià)格等，分頁查詢訂單項(xiàng)數(shù)據(jù)。具體的實(shí)踐，請(qǐng)看下文。

• 通過商品、品牌、價(jià)格等條件，分頁查詢訂單數(shù)據(jù)

@ActiveProfiles(“dev”)@RunWith(SpringRunner.class)@SpringBootTestpublic class OrderIndexServiceJunit { @Autowired private ElasticSearchClient elasticSearchClient; /** * 通過商品、品牌、價(jià)格等條件，分頁查詢訂單數(shù)據(jù) * @param request */ @Test public void search1(){ //查詢索引，支持通配符 String indexName = “orderIndex-*”; String orderUserName = “張三”; String productName = “薯?xiàng)l”; // 條件搜索 SearchSourceBuilder builder = new SearchSourceBuilder(); //組合搜索 BoolQueryBuilder mainBoolQuery = new BoolQueryBuilder(); mainBoolQuery.must(QueryBuilders.matchQuery(“orderUserName”, orderUserName)); //訂單項(xiàng)相關(guān)信息搜索 BoolQueryBuilder nestedBoolQuery = new BoolQueryBuilder(); nestedBoolQuery.must(QueryBuilders.matchQuery(“orderItems.productName”, productName)); //內(nèi)嵌對(duì)象搜索，需要指定path NestedQueryBuilder nestedQueryBuilder = QueryBuilders.nestedQuery(“orderItems”,nestedBoolQuery, ScoreMode.None); //子表查詢 mainBoolQuery.must(nestedQueryBuilder); //封裝查詢參數(shù) builder.query(mainBoolQuery); //返回參數(shù) builder.fetchSource(new String[]{}, new String[]{}); //結(jié)果集合分頁，從第一頁開始，返回最多四條數(shù)據(jù) builder.from(0).size(4); //排序 builder.sort(“orderId”, SortOrder.DESC); log.info(“dsl：{}”, builder.toString()); // 執(zhí)行請(qǐng)求 SearchResponse response = elasticSearchClient.searchDocument(indexName, builder); // 當(dāng)前返回的總行數(shù) long count = response.getHits().getTotalHits(); // 返回的具體行數(shù) SearchHit[] searchHits = response.getHits().getHits(); log.info(“response：{}”, response.toString()); }}

• 通過訂單ID、商品、品牌、價(jià)格等，分頁查詢訂單項(xiàng)數(shù)據(jù)

@ActiveProfiles(“dev”)@RunWith(SpringRunner.class)@SpringBootTestpublic class OrderIndexServiceJunit { @Autowired private ElasticSearchClient elasticSearchClient; /** * 通過訂單ID、商品、品牌、價(jià)格等，分頁查詢訂單項(xiàng)數(shù)據(jù) * @param request */ @Test public void search2(){ //查詢索引，支持通配符 String indexName = “orderIndex-*”; String orderId = “202202020202”; String productName = “薯?xiàng)l”; // 條件搜索 SearchSourceBuilder builder = new SearchSourceBuilder(); //組合搜索 BoolQueryBuilder mainBoolQuery = new BoolQueryBuilder(); mainBoolQuery.must(QueryBuilders.termQuery(“_id”, orderId)); //訂單項(xiàng)相關(guān)信息搜索 BoolQueryBuilder nestedBoolQuery = new BoolQueryBuilder(); nestedBoolQuery.must(QueryBuilders.matchQuery(“orderItems.productName”, productName)); //內(nèi)嵌對(duì)象搜索，需要指定path NestedQueryBuilder nestedQueryBuilder = QueryBuilders.nestedQuery(“orderItems”,nestedBoolQuery, ScoreMode.None); //內(nèi)嵌對(duì)象分頁查詢 InnerHitBuilder innerHitBuilder = new InnerHitBuilder(); //結(jié)果集合分頁，從第一頁開始，返回最多四條數(shù)據(jù) innerHitBuilder.setFrom(0).setSize(4); //只返回訂單項(xiàng)id innerHitBuilder.setFetchSourceContext(new FetchSourceContext(true, new String[]{“orderItems.orderItemId”}, new String[]{})); innerHitBuilder.addSort(SortBuilders.fieldSort(“orderItems.orderItemId”).order(SortOrder.DESC)); nestedQueryBuilder.innerHit(innerHitBuilder); //子表查詢 mainBoolQuery.must(nestedQueryBuilder); //封裝查詢參數(shù) builder.query(mainBoolQuery); //返回參數(shù) builder.fetchSource(new String[]{}, new String[]{}); //結(jié)果集合分頁，從第一頁開始，返回最多四條數(shù)據(jù) builder.from(0).size(4); //排序 builder.sort(“orderId”, SortOrder.DESC); log.info(“dsl：{}”, builder.toString()); // 執(zhí)行請(qǐng)求 SearchResponse response = elasticSearchClient.searchDocument(indexName, builder); // 當(dāng)前返回的訂單主表總行數(shù) long count = response.getHits().getTotalHits(); // 返回的訂單主表數(shù)據(jù) SearchHit[] searchHits = response.getHits().getHits(); // 返回查詢的的訂單項(xiàng)分頁數(shù)據(jù) Map = searchHit[0].getInnerHits(); log.info(“response：{}”, response.toString()); }}

三、小結(jié)

本文主要以通過商品名稱查詢訂單數(shù)據(jù)為案例，介紹利用 SpringBoot 整合 es 實(shí)現(xiàn)數(shù)據(jù)的高效搜索，內(nèi)容如果難免有些遺漏，歡迎網(wǎng)友指出！

原文鏈接：https://mp.weixin.qq.com/s/ERwwG9gBY1apk1Q6_9Sr0w