package com.changgou.search.service.impl;
import com.alibaba.fastjson.JSON;
import com.changgou.search.pojo.SkuInfo;
import com.changgou.search.service.SearchService;
import org.apache.commons.lang.StringUtils;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.index.query.BoolQueryBuilder;
import org.elasticsearch.index.query.Operator;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.aggregations.Aggregation;
import org.elasticsearch.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.aggregations.bucket.terms.StringTerms;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightField;
import org.elasticsearch.search.sort.SortBuilders;
import org.elasticsearch.search.sort.SortOrder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
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.SearchResultMapper;
import org.springframework.data.elasticsearch.core.aggregation.AggregatedPage;
import org.springframework.data.elasticsearch.core.aggregation.impl.AggregatedPageImpl;
import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
import org.springframework.stereotype.Service;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
@Service
public class SearchServiceImpl implements SearchService {
@Autowired
private ElasticsearchTemplate elasticsearchTemplate;
@Override
public Map search(Map<String, String> searchMap) {
Map<String,Object> resultMap = new HashMap<>();
//構建查詢
if (searchMap != null){
//構建查詢條件封裝物件
NativeSearchQueryBuilder nativeSearchQueryBuilder = new NativeSearchQueryBuilder();
BoolQueryBuilder boolQuery = QueryBuilders.boolQuery();
//按照關鍵字查詢
if (StringUtils.isNotEmpty(searchMap.get("keywords"))){
boolQuery.must(QueryBuilders.matchQuery("name",searchMap.get("keywords")).operator(Operator.AND));
}
//按照品牌進行過濾查詢
if (StringUtils.isNotEmpty(searchMap.get("brand"))){
boolQuery.filter(QueryBuilders.termQuery("brandName",searchMap.get("brand")));
}
//按照規格進行過濾查詢
for (String key : searchMap.keySet()) {
if (key.startsWith("spec_")){
String value = searchMap.get(key).replace("%2B","+");
//spec_網路制式
boolQuery.filter(QueryBuilders.termQuery(("specMap."+key.substring(5)+".keyword"),value));
}
}
//按照價格進行區間過濾查詢
if (StringUtils.isNotEmpty(searchMap.get("price"))){
String[] prices = searchMap.get("price").split("-");
// 0-500 500-1000
if (prices.length == 2){
boolQuery.filter(QueryBuilders.rangeQuery("price").lte(prices[1]));
}
boolQuery.filter(QueryBuilders.rangeQuery("price").gte(prices[0]));
}
nativeSearchQueryBuilder.withQuery(boolQuery);
//按照品牌進行分組(聚合)查詢
String skuBrand="skuBrand";
nativeSearchQueryBuilder.addAggregation(AggregationBuilders.terms(skuBrand).field("brandName"));
//按照規格進行聚合查詢
String skuSpec="skuSpec";
nativeSearchQueryBuilder.addAggregation(AggregationBuilders.terms(skuSpec).field("spec.keyword"));
//開啟分頁查詢
String pageNum = searchMap.get("pageNum"); //當前頁
String pageSize = searchMap.get("pageSize"); //每頁顯示多少條
if (StringUtils.isEmpty(pageNum)){
pageNum ="1";
}
if (StringUtils.isEmpty(pageSize)){
pageSize="30";
}
//設定分頁
//第一個引數:當前頁 是從0開始
//第二個引數:每頁顯示多少條
nativeSearchQueryBuilder.withPageable(PageRequest.of(Integer.parseInt(pageNum)-1,Integer.parseInt(pageSize)));
//按照相關欄位進行排序查詢
// 1.當前域 2.當前的排序操作(升序ASC,降序DESC)
if (StringUtils.isNotEmpty(searchMap.get("sortField")) && StringUtils.isNotEmpty(searchMap.get("sortRule"))){
if ("ASC".equals(searchMap.get("sortRule"))){
//升序
nativeSearchQueryBuilder.withSort(SortBuilders.fieldSort((searchMap.get("sortField"))).order(SortOrder.ASC));
}else{
//降序
nativeSearchQueryBuilder.withSort(SortBuilders.fieldSort((searchMap.get("sortField"))).order(SortOrder.DESC));
}
}
//設定高亮域以及高亮的樣式
HighlightBuilder.Field field = new HighlightBuilder.Field("name")//高亮域
.preTags("<span style='color:red'>")//高亮樣式的前綴
.postTags("</span>");//高亮樣式的后綴
nativeSearchQueryBuilder.withHighlightFields(field);
//開啟查詢
/**
* 第一個引數: 條件構建物件
* 第二個引數: 查詢操作物體類
* 第三個引數: 查詢結果操作物件
*/
//封裝查詢結果
AggregatedPage<SkuInfo> resultInfo = elasticsearchTemplate.queryForPage(nativeSearchQueryBuilder.build(), SkuInfo.class, new SearchResultMapper() {
@Override
public <T> AggregatedPage<T> mapResults(SearchResponse searchResponse, Class<T> aClass, Pageable pageable) {
//查詢結果操作
List<T> list = new ArrayList<>();
//獲取查詢命中結果資料
SearchHits hits = searchResponse.getHits();
if (hits != null){
//有查詢結果
for (SearchHit hit : hits) {
//SearchHit轉換為skuinfo
SkuInfo skuInfo = JSON.parseObject(hit.getSourceAsString(), SkuInfo.class);
Map<String, HighlightField> highlightFields = hit.getHighlightFields();
if (highlightFields != null && highlightFields.size()>0){
//替換資料
skuInfo.setName(highlightFields.get("name").getFragments()[0].toString());
}
list.add((T) skuInfo);
}
}
return new AggregatedPageImpl<T>(list,pageable,hits.getTotalHits(),searchResponse.getAggregations());
}
});
//封裝最終的回傳結果
//總記錄數
resultMap.put("total",resultInfo.getTotalElements());
//總頁數
resultMap.put("totalPages",resultInfo.getTotalPages());
//資料集合
resultMap.put("rows",resultInfo.getContent());
//封裝品牌的分組結果
StringTerms brandTerms = (StringTerms) resultInfo.getAggregation(skuBrand);
List<String> brandList = brandTerms.getBuckets().stream().map(bucket -> bucket.getKeyAsString()).collect(Collectors.toList());
resultMap.put("brandList",brandList);
//封裝規格分組結果
StringTerms specTerms= (StringTerms) resultInfo.getAggregation(skuSpec);
List<String> specList = specTerms.getBuckets().stream().map(bucket -> bucket.getKeyAsString()).collect(Collectors.toList());
resultMap.put("specList",specList);
//當前頁
resultMap.put("pageNum",pageNum);
return resultMap;
}
return null;
}
}
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標籤：Java EE