Elasticsearch也可以实现商品智能搜索
本文主要讲解整合Elasticsearch的过程，以实现商品信息在Elasticsearch中的导入、查询、修改、删除为例。
项目使用框架介绍
Elasticsearch
Elasticsearch 是一个分布式、可扩展、实时的搜索与数据分析引擎。 它能从项目一开始就赋予你的数据以搜索、分析和探索的能力，可用于实现全文搜索和实时数据统计。
package com.macro.mall.search.domain;
import org.springframework.data.annotation.Id;
import org.springframework.data.elasticsearch.annotations.Document;
import org.springframework.data.elasticsearch.annotations.Field;
import org.springframework.data.elasticsearch.annotations.FieldType;
import java.io.Serializable;
import java.math.BigDecimal;
import java.util.List;
@Document(indexName = "pms", type = "product",shards = 1,replicas = 0)
public class EsProduct implements Serializable {
private static final long serialVersionUID = -1L;
@Id
private Long id;
@Field(type = FieldType.Keyword)
private String productSn;
private Long brandId;
@Field(type = FieldType.Keyword)
private String brandName;
private Long productCategoryId;
@Field(type = FieldType.Keyword)
private String productCategoryName;
private String pic;
@Field(analyzer = "ik_max_word",type = FieldType.Text)
private String name;
@Field(analyzer = "ik_max_word",type = FieldType.Text)
private String subTitle;
@Field(analyzer = "ik_max_word",type = FieldType.Text)
private String keywords;
private BigDecimal price;
private Integer sale;
private Integer newStatus;
private Integer recommandStatus;
private Integer stock;
private Integer promotionType;
private Integer sort;
@Field(type =FieldType.Nested)
private List<EsProductAttributeValue> attrValueList;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getProductSn() {
return productSn;
}
public void setProductSn(String productSn) {
this.productSn = productSn;
}
public Long getBrandId() {
return brandId;
}
public void setBrandId(Long brandId) {
this.brandId = brandId;
}
public String getBrandName() {
return brandName;
}
public void setBrandName(String brandName) {
this.brandName = brandName;
}
public Long getProductCategoryId() {
return productCategoryId;
}
public void setProductCategoryId(Long productCategoryId) {
this.productCategoryId = productCategoryId;
}
public String getProductCategoryName() {
return productCategoryName;
}
public void setProductCategoryName(String productCategoryName) {
this.productCategoryName = productCategoryName;
}
public String getPic() {
return pic;
}
public void setPic(String pic) {
this.pic = pic;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSubTitle() {
return subTitle;
}
public void setSubTitle(String subTitle) {
this.subTitle = subTitle;
}
public BigDecimal getPrice() {
return price;
}
public void setPrice(BigDecimal price) {
this.price = price;
}
public Integer getSale() {
return sale;
}
public void setSale(Integer sale) {
this.sale = sale;
}
public Integer getNewStatus() {
return newStatus;
}
public void setNewStatus(Integer newStatus) {
this.newStatus = newStatus;
}
public Integer getRecommandStatus() {
return recommandStatus;
}
public void setRecommandStatus(Integer recommandStatus) {
this.recommandStatus = recommandStatus;
}
public Integer getStock() {
return stock;
}
public void setStock(Integer stock) {
this.stock = stock;
}
public Integer getPromotionType() {
return promotionType;
}
public void setPromotionType(Integer promotionType) {
this.promotionType = promotionType;
}
public Integer getSort() {
return sort;
}
public void setSort(Integer sort) {
this.sort = sort;
}
public List<EsProductAttributeValue> getAttrValueList() {
return attrValueList;
}
public void setAttrValueList(List<EsProductAttributeValue> attrValueList) {
this.attrValueList = attrValueList;
}
public String getKeywords() {
return keywords;
}
public void setKeywords(String keywords) {
this.keywords = keywords;
}
}
搜索中的商品属性信息
package com.macro.mall.search.domain;
import org.springframework.data.elasticsearch.annotations.Field;
import org.springframework.data.elasticsearch.annotations.FieldType;
import java.io.Serializable;
public class EsProductAttributeValue implements Serializable {
private static final long serialVersionUID = 1L;
private Long id;
private Long productAttributeId;
//属性值
@Field(type = FieldType.Keyword)
private String value;
//属性参数：0->规格；1->参数
private Integer type;
//属性名称
@Field(type=FieldType.Keyword)
private String name;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public Long getProductAttributeId() {
return productAttributeId;
}
public void setProductAttributeId(Long productAttributeId) {
this.productAttributeId = productAttributeId;
}
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
public Integer getType() {
return type;
}
public void setType(Integer type) {
this.type = type;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
搜索相关商品品牌名称，分类名称及属性
package com.macro.mall.search.domain;
import java.util.List;
public class EsProductRelatedInfo {
private List<String> brandNames;
private List<String> productCategoryNames;
private List<ProductAttr> productAttrs;
public List<String> getBrandNames() {
return brandNames;
}
public void setBrandNames(List<String> brandNames) {
this.brandNames = brandNames;
}
public List<String> getProductCategoryNames() {
return productCategoryNames;
}
public void setProductCategoryNames(List<String> productCategoryNames) {
this.productCategoryNames = productCategoryNames;
}
public List<ProductAttr> getProductAttrs() {
return productAttrs;
}
public void setProductAttrs(List<ProductAttr> productAttrs) {
this.productAttrs = productAttrs;
}
public static class ProductAttr{
private Long attrId;
private String attrName;
private List<String> attrValues;
public Long getAttrId() {
return attrId;
}
public void setAttrId(Long attrId) {
this.attrId = attrId;
}
public List<String> getAttrValues() {
return attrValues;
}
public void setAttrValues(List<String> attrValues) {
this.attrValues = attrValues;
}
public String getAttrName() {
return attrName;
}
public void setAttrName(String attrName) {
this.attrName = attrName;
}
}
}
接口类
package com.macro.mall.search.repository;
import com.macro.mall.search.domain.EsProduct;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
public interface EsProductRepository extends ElasticsearchRepository<EsProduct, Long> {
/**
* 搜索查询
*
* @param name 商品名称
* @param subTitle 商品标题
* @param keywords 商品关键字
* @param page 分页信息
* @return
*/
Page<EsProduct> findByNameOrSubTitleOrKeywords(String name, String subTitle, String keywords,Pageable page);
}
商品搜索管理Service实现类
package com.macro.mall.search.service.impl;
import com.macro.mall.search.dao.EsProductDao;
import com.macro.mall.search.domain.EsProduct;
import com.macro.mall.search.domain.EsProductRelatedInfo;
import com.macro.mall.search.repository.EsProductRepository;
import com.macro.mall.search.service.EsProductService;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.common.lucene.search.function.FunctionScoreQuery;
import org.elasticsearch.index.query.BoolQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.functionscore.FunctionScoreQueryBuilder;
import org.elasticsearch.index.query.functionscore.ScoreFunctionBuilders;
import org.elasticsearch.search.aggregations.AbstractAggregationBuilder;
import org.elasticsearch.search.aggregations.Aggregation;
import org.elasticsearch.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.aggregations.bucket.filter.InternalFilter;
import org.elasticsearch.search.aggregations.bucket.nested.InternalNested;
import org.elasticsearch.search.aggregations.bucket.terms.LongTerms;
import org.elasticsearch.search.aggregations.bucket.terms.StringTerms;
import org.elasticsearch.search.aggregations.bucket.terms.Terms;
import org.elasticsearch.search.sort.SortBuilders;
import org.elasticsearch.search.sort.SortOrder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageImpl;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.elasticsearch.core.ElasticsearchTemplate;
import org.springframework.data.elasticsearch.core.query.NativeSearchQuery;
import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;
import org.springframework.util.StringUtils;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
@Service
public class EsProductServiceImpl implements EsProductService {
private static final Logger LOGGER = LoggerFactory.getLogger(EsProductServiceImpl.class);
@Autowired
private EsProductDao productDao;
@Autowired
private EsProductRepository productRepository;
@Autowired
private ElasticsearchTemplate elasticsearchTemplate;
@Override
public int importAll() {
List<EsProduct> esProductList = productDao.getAllEsProductList(null);
Iterable<EsProduct> esProductIterable = productRepository.saveAll(esProductList);
Iterator<EsProduct> iterator = esProductIterable.iterator();
int result = 0;
while (iterator.hasNext()) {
result++;
iterator.next();
}
return result;
}
@Override
public void delete(Long id) {
productRepository.deleteById(id);
}
@Override
public EsProduct create(Long id) {
EsProduct result = null;
List<EsProduct> esProductList = productDao.getAllEsProductList(id);
if (esProductList.size() > 0) {
EsProduct esProduct = esProductList.get(0);
result = productRepository.save(esProduct);
}
return result;
}
@Override
public void delete(List<Long> ids) {
if (!CollectionUtils.isEmpty(ids)) {
List<EsProduct> esProductList = new ArrayList<>();
for (Long id : ids) {
EsProduct esProduct = new EsProduct();
esProduct.setId(id);
esProductList.add(esProduct);
}
productRepository.deleteAll(esProductList);
}
}
@Override
public Page<EsProduct> search(String keyword, Integer pageNum, Integer pageSize) {
Pageable pageable = PageRequest.of(pageNum, pageSize);
return productRepository.findByNameOrSubTitleOrKeywords(keyword, keyword, keyword, pageable);
}
@Override
public Page<EsProduct> search(String keyword, Long brandId, Long productCategoryId, Integer pageNum, Integer pageSize,Integer sort) {
Pageable pageable = PageRequest.of(pageNum, pageSize);
NativeSearchQueryBuilder nativeSearchQueryBuilder = new NativeSearchQueryBuilder();
//分页
nativeSearchQueryBuilder.withPageable(pageable);
//过滤
if (brandId != null || productCategoryId != null) {
BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
if (brandId != null) {
boolQueryBuilder.must(QueryBuilders.termQuery("brandId", brandId));
}
if (productCategoryId != null) {
boolQueryBuilder.must(QueryBuilders.termQuery("productCategoryId", productCategoryId));
}
nativeSearchQueryBuilder.withFilter(boolQueryBuilder);
}
//搜索
if (StringUtils.isEmpty(keyword)) {
nativeSearchQueryBuilder.withQuery(QueryBuilders.matchAllQuery());
} else {
List<FunctionScoreQueryBuilder.FilterFunctionBuilder> filterFunctionBuilders = new ArrayList<>();
filterFunctionBuilders.add(new FunctionScoreQueryBuilder.FilterFunctionBuilder(QueryBuilders.matchQuery("name", keyword),
ScoreFunctionBuilders.weightFactorFunction(10)));
filterFunctionBuilders.add(new FunctionScoreQueryBuilder.FilterFunctionBuilder(QueryBuilders.matchQuery("subTitle", keyword),
ScoreFunctionBuilders.weightFactorFunction(5)));
filterFunctionBuilders.add(new FunctionScoreQueryBuilder.FilterFunctionBuilder(QueryBuilders.matchQuery("keywords", keyword),
ScoreFunctionBuilders.weightFactorFunction(2)));
FunctionScoreQueryBuilder.FilterFunctionBuilder[] builders = new FunctionScoreQueryBuilder.FilterFunctionBuilder[filterFunctionBuilders.size()];
filterFunctionBuilders.toArray(builders);
FunctionScoreQueryBuilder functionScoreQueryBuilder = QueryBuilders.functionScoreQuery(builders)
.scoreMode(FunctionScoreQuery.ScoreMode.SUM)
.setMinScore(2);
nativeSearchQueryBuilder.withQuery(functionScoreQueryBuilder);
}
//排序
if(sort==1){
//按新品从新到旧
nativeSearchQueryBuilder.withSort(SortBuilders.fieldSort("id").order(SortOrder.DESC));
}else if(sort==2){
//按销量从高到低
nativeSearchQueryBuilder.withSort(SortBuilders.fieldSort("sale").order(SortOrder.DESC));
}else if(sort==3){
//按价格从低到高
nativeSearchQueryBuilder.withSort(SortBuilders.fieldSort("price").order(SortOrder.ASC));
}else if(sort==4){
//按价格从高到低
nativeSearchQueryBuilder.withSort(SortBuilders.fieldSort("price").order(SortOrder.DESC));
}else{
//按相关度
nativeSearchQueryBuilder.withSort(SortBuilders.scoreSort().order(SortOrder.DESC));
}
nativeSearchQueryBuilder.withSort(SortBuilders.scoreSort().order(SortOrder.DESC));
NativeSearchQuery searchQuery = nativeSearchQueryBuilder.build();
LOGGER.info("DSL:{}", searchQuery.getQuery().toString());
return productRepository.search(searchQuery);
}
@Override
public Page<EsProduct> recommend(Long id, Integer pageNum, Integer pageSize) {
Pageable pageable = PageRequest.of(pageNum, pageSize);
List<EsProduct> esProductList = productDao.getAllEsProductList(id);
if (esProductList.size() > 0) {
EsProduct esProduct = esProductList.get(0);
String keyword = esProduct.getName();
Long brandId = esProduct.getBrandId();
Long productCategoryId = esProduct.getProductCategoryId();
//根据商品标题、品牌、分类进行搜索
List<FunctionScoreQueryBuilder.FilterFunctionBuilder> filterFunctionBuilders = new ArrayList<>();
filterFunctionBuilders.add(new FunctionScoreQueryBuilder.FilterFunctionBuilder(QueryBuilders.matchQuery("name", keyword),
ScoreFunctionBuilders.weightFactorFunction(8)));
filterFunctionBuilders.add(new FunctionScoreQueryBuilder.FilterFunctionBuilder(QueryBuilders.matchQuery("subTitle", keyword),
ScoreFunctionBuilders.weightFactorFunction(2)));
filterFunctionBuilders.add(new FunctionScoreQueryBuilder.FilterFunctionBuilder(QueryBuilders.matchQuery("keywords", keyword),
ScoreFunctionBuilders.weightFactorFunction(2)));
filterFunctionBuilders.add(new FunctionScoreQueryBuilder.FilterFunctionBuilder(QueryBuilders.matchQuery("brandId", brandId),
ScoreFunctionBuilders.weightFactorFunction(10)));
filterFunctionBuilders.add(new FunctionScoreQueryBuilder.FilterFunctionBuilder(QueryBuilders.matchQuery("productCategoryId", productCategoryId),
ScoreFunctionBuilders.weightFactorFunction(6)));
FunctionScoreQueryBuilder.FilterFunctionBuilder[] builders = new FunctionScoreQueryBuilder.FilterFunctionBuilder[filterFunctionBuilders.size()];
filterFunctionBuilders.toArray(builders);
FunctionScoreQueryBuilder functionScoreQueryBuilder = QueryBuilders.functionScoreQuery(builders)
.scoreMode(FunctionScoreQuery.ScoreMode.SUM)
.setMinScore(2);
NativeSearchQueryBuilder builder = new NativeSearchQueryBuilder();
builder.withQuery(functionScoreQueryBuilder);
builder.withPageable(pageable);
NativeSearchQuery searchQuery = builder.build();
LOGGER.info("DSL:{}", searchQuery.getQuery().toString());
return productRepository.search(searchQuery);
}
return new PageImpl<>(null);
}
@Override
public EsProductRelatedInfo searchRelatedInfo(String keyword) {
NativeSearchQueryBuilder builder = new NativeSearchQueryBuilder();
//搜索条件
if(StringUtils.isEmpty(keyword)){
builder.withQuery(QueryBuilders.matchAllQuery());
}else{
builder.withQuery(QueryBuilders.multiMatchQuery(keyword,"name","subTitle","keywords"));
}
//聚合搜索品牌名称
builder.addAggregation(AggregationBuilders.terms("brandNames").field("brandName"));
//集合搜索分类名称
builder.addAggregation(AggregationBuilders.terms("productCategoryNames").field("productCategoryName"));
//聚合搜索商品属性，去除type=1的属性
AbstractAggregationBuilder aggregationBuilder = AggregationBuilders.nested("allAttrValues","attrValueList")
.subAggregation(AggregationBuilders.filter("productAttrs",QueryBuilders.termQuery("attrValueList.type",1))
.subAggregation(AggregationBuilders.terms("attrIds")
.field("attrValueList.productAttributeId")
.subAggregation(AggregationBuilders.terms("attrValues")
.field("attrValueList.value"))
.subAggregation(AggregationBuilders.terms("attrNames")
.field("attrValueList.name"))));
builder.addAggregation(aggregationBuilder);
NativeSearchQuery searchQuery = builder.build();
return elasticsearchTemplate.query(searchQuery, response -> {
LOGGER.info("DSL:{}",searchQuery.getQuery().toString());
return convertProductRelatedInfo(response);
});
}
/**
* 将返回结果转换为对象
*/
private EsProductRelatedInfo convertProductRelatedInfo(SearchResponse response) {
EsProductRelatedInfo productRelatedInfo = new EsProductRelatedInfo();
Map<String, Aggregation> aggregationMap = response.getAggregations().getAsMap();
//设置品牌
Aggregation brandNames = aggregationMap.get("brandNames");
List<String> brandNameList = new ArrayList<>();
for(int i = 0; i<((Terms) brandNames).getBuckets().size(); i++){
brandNameList.add(((Terms) brandNames).getBuckets().get(i).getKeyAsString());
}
productRelatedInfo.setBrandNames(brandNameList);
//设置分类
Aggregation productCategoryNames = aggregationMap.get("productCategoryNames");
List<String> productCategoryNameList = new ArrayList<>();
for(int i=0;i<((Terms) productCategoryNames).getBuckets().size();i++){
productCategoryNameList.add(((Terms) productCategoryNames).getBuckets().get(i).getKeyAsString());
}
productRelatedInfo.setProductCategoryNames(productCategoryNameList);
//设置参数
Aggregation productAttrs = aggregationMap.get("allAttrValues");
List<LongTerms.Bucket> attrIds = ((LongTerms) ((InternalFilter) ((InternalNested) productAttrs).getProperty("productAttrs")).getProperty("attrIds")).getBuckets();
List<EsProductRelatedInfo.ProductAttr> attrList = new ArrayList<>();
for (Terms.Bucket attrId : attrIds) {
EsProductRelatedInfo.ProductAttr attr = new EsProductRelatedInfo.ProductAttr();
attr.setAttrId((Long) attrId.getKey());
List<String> attrValueList = new ArrayList<>();
List<StringTerms.Bucket> attrValues = ((StringTerms) attrId.getAggregations().get("attrValues")).getBuckets();
List<StringTerms.Bucket> attrNames = ((StringTerms) attrId.getAggregations().get("attrNames")).getBuckets();
for (Terms.Bucket attrValue : attrValues) {
attrValueList.add(attrValue.getKeyAsString());
}
attr.setAttrValues(attrValueList);
if(!CollectionUtils.isEmpty(attrNames)){
String attrName = attrNames.get(0).getKeyAsString();
attr.setAttrName(attrName);
}
attrList.add(attr);
}
productRelatedInfo.setProductAttrs(attrList);
return productRelatedInfo;
}
}
进行接口测试
将数据库中数据导入到Elasticsearch
进行商品搜索
