Springboot整合Elasticsearch 7.X 复杂查询
这里使用Springboot 2.7.12版本，Elasticsearch为7.15.0。
导入依赖
<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-elasticsearch</artifactId></dependency>yaml文件配置:
elasticsearch:uris: http://localhost:9200构建实体类，这里为商品的SKU属性表
@Data
@Document(indexName = "skusearch")
public class SkuEs {@Idprivate String id;@Field(type = FieldType.Text,analyzer = "ik_smart",searchAnalyzer = "ik_smart")private String name;private Integer price;private Integer num;private String image;private String images;private Date createTime;private Date updateTime;private String spuId;private Integer categoryId;//Keyword：不分词@Field(type= FieldType.Keyword)private String categoryName;private Integer brandId;@Field(type=FieldType.Keyword)private String brandName;@Field(type=FieldType.Keyword)private String skuAttribute;private Integer status;
}构建service层进行复杂查询：指定条件查询，聚合查询，分页查询，排序查询，高亮等等
@Service
public class SkuSearchServiceImpl implements SkuSearchService {@AutowiredElasticsearchRestTemplate elasticsearchRestTemplate;@Overridepublic Map<String, Object> search(Map<String, Object> map) {if(map!=null&&map.size()>0) {NativeSearchQueryBuilder queryBuilder = queryBuilder(map);//分组查询group(queryBuilder, map);// NativeSearchQuery nativeSearchQuery = queryBuilder.build();SearchHits<SkuEs> skuEsSearchHits = elasticsearchRestTemplate.search(queryBuilder.build(), SkuEs.class);AggregationsContainer<?> aggregations = skuEsSearchHits.getAggregations();Aggregations aggregations1 = (Aggregations) aggregations.aggregations();Map<String, Object> searchMap = new HashMap<>();//解析分组数据parseGroup(aggregations1, searchMap);//遍历返回的内容进行处理List<SearchHit<SkuEs>> searchHits = skuEsSearchHits.getSearchHits();//将高亮的内容填充到content中List<SkuEs> skuEsList = searchHits.stream().map(i -> {Map<String, List<String>> highlightFields = i.getHighlightFields();List<String> name = highlightFields.get("name");i.getContent().setName(name==null?i.getContent().getName():name.get(0));return i.getContent();}).collect(Collectors.toList());//数据元素searchMap.put("list", skuEsList);//数据元素总数searchMap.put("totalElements", skuEsList.size());return searchMap;}return null;}public NativeSearchQueryBuilder queryBuilder(Map<String, Object> searchMap){NativeSearchQueryBuilder queryBuilder=new NativeSearchQueryBuilder();BoolQueryBuilder boolQueryBuilder=new BoolQueryBuilder();if(searchMap!=null&&searchMap.size()>0){//根据产品关键词进行查询String keyword = searchMap.get("keyword").toString();if(!StringUtils.isEmpty(keyword))boolQueryBuilder.must(QueryBuilders.termQuery("name",keyword));//查询指定的品牌String brandName=searchMap.get("brand").toString();if(!StringUtils.isEmpty(brandName)){boolQueryBuilder.must(QueryBuilders.termQuery("brandName",brandName));}//根据价格进行查询，形式为gteprice-ltepriceString price = searchMap.get("price").toString();if(!StringUtils.isEmpty(price)){String[] split = price.split("-");boolQueryBuilder.must(QueryBuilders.rangeQuery("price").gte(split[0]));if(split.length>1)boolQueryBuilder.must(QueryBuilders.rangeQuery("price").lte(split[1]));}}//根据价格，对于查询出来的产品进行降序排列queryBuilder.withSort(SortBuilders.fieldSort("price").order(SortOrder.DESC));//分页查询queryBuilder.withPageable(PageRequest.of(Integer.parseInt(searchMap.get("current").toString()),Integer.parseInt(searchMap.get("size").toString())));queryBuilder.withQuery(boolQueryBuilder);//高亮设置queryBuilder.withHighlightFields(new HighlightBuilder.Field("name"));queryBuilder.withHighlightBuilder(new HighlightBuilder().preTags("<em>").postTags("</em>"));return queryBuilder;}public void group(NativeSearchQueryBuilder queryBuilder,Map<String, Object> searchMap){//用户如果没有输入分类条件，则需要将分类搜索出来，作为条件提供给用户if(StringUtils.isEmpty(searchMap.get("category"))){queryBuilder.withAggregations(AggregationBuilders.terms("categoryList").field("categoryName").size(100));}//用户如果没有输入品牌条件，则需要将品牌搜索出来，作为条件提供给用户if(StringUtils.isEmpty(searchMap.get("brand"))){queryBuilder.withAggregations(AggregationBuilders.terms("brandList").field("brandName").size(100));}}//解析分组数据public void parseGroup(Aggregations aggregations, Map<String,Object> resultMap){if(aggregations!=null){for (Aggregation aggregation : aggregations) {ParsedStringTerms terms = (ParsedStringTerms) aggregation;String name = terms.getName();List<String> collect = terms.getBuckets().stream().map(i -> i.getKeyAsString()).collect(Collectors.toList());resultMap.put(name,collect);}}}}
接口测试：
查询如下：
{"data": {"categoryList": ["软件研发"],"brandList": ["华为"],"list": [{"id": "1318594982227025922","name": "<em>华为</em>Mate40 Pro 32G","price": 114,"num": 1228,"image": "https://sklll.oss-cn-beijing.aliyuncs.com/secby/af1faf56-b10a-4700-9896-3143a2d1c40f.jpg","images": "https://sklll.oss-cn-beijing.aliyuncs.com/secby/a65bfbe4-21b7-42b2-b5cf-47a9730e0a16.jpg,https://sklll.oss-cn-beijing.aliyuncs.com/secby/fa52ef66-7724-4d6e-bece-15eba0f8f903.jpg,https://sklll.oss-cn-beijing.aliyuncs.com/secby/734f0f17-ac73-45d3-a6bf-83e1569ce887.jpg","createTime": "2020-10-20T08:48:37.000+00:00","updateTime": "2023-12-30T07:41:20.000+00:00","spuId": "1318594982147334146","categoryId": 11159,"categoryName": "软件研发","brandId": 11,"brandName": "华为","skuAttribute": "{\"就业薪资\":\"10K起\",\"学习费用\":\"2万\"}","status": 1,"attrMap": null},{"id": "1318596430360813570","name": "<em>华为</em>Mate40 Pro 32G 1800万像素","price": 112,"num": 1227,"image": "https://sklll.oss-cn-beijing.aliyuncs.com/secby/9247d041-e940-426c-8e50-06084b631063.jpg","images": "https://sklll.oss-cn-beijing.aliyuncs.com/secby/5f5b7435-6cf2-4797-8f65-d4abff181390.jpg","createTime": "2020-10-20T08:54:22.000+00:00","updateTime": "2023-12-30T07:41:21.000+00:00","spuId": "1318596430293704706","categoryId": 11159,"categoryName": "软件研发","brandId": 11,"brandName": "华为","skuAttribute": "{\"就业薪资\":\"10K起\",\"学习费用\":\"2万\"}","status": 1,"attrMap": null},{"id": "1318596430398562305","name": "<em>华为</em>Mate40 Pro 128G","price": 111,"num": 1226,"image": "https://sklll.oss-cn-beijing.aliyuncs.com/secby/900a3618-9884-4778-bad9-c6c31eaf3eab.jpg","images": "https://sklll.oss-cn-beijing.aliyuncs.com/secby/5f5b7435-6cf2-4797-8f65-d4abff181390.jpg","createTime": "2020-10-20T08:54:22.000+00:00","updateTime": "2023-12-30T07:41:24.000+00:00","spuId": "1318596430293704706","categoryId": 11159,"categoryName": "软件研发","brandId": 11,"brandName": "华为","skuAttribute": "{\"就业薪资\":\"10K起\",\"学习费用\":\"2万\"}","status": 1,"attrMap": null}],"totalElements": 3},"code": 20000,"message": "操作成功"
}