springboot集成es实现搜索功能
项目上有需求,需要集成es实现分词搜索,提高搜索效率。既然用到了es的人,相信也会提前了解es的功能,这里就不赘述了。前提是需要通过像logstash这种工具,将数据灌入到es中,才能通过es在java中实现快速搜索功能。package cn.xxx.rdc.knowledge.service.impl;import java.io.IOException;import java.util.Arr
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项目上有需求,需要集成es实现分词搜索,提高搜索效率。既然用到了es的人,相信也会提前了解es的功能,这里就不赘述了。前提是需要通过像logstash这种工具,将数据灌入到es中,才能通过es在java中实现快速搜索功能。
package cn.xxx.rdc.knowledge.service.impl;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.BoolQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.alibaba.fastjson.JSONObject;
import cn.xxx.core.feature.orm.mybatis.Page;
import cn.xxx.rdc.knowledge.dao.KbSearchPageMapper;
import cn.xxx.rdc.knowledge.dto.KbSearchInParamDto;
import cn.xxx.rdc.knowledge.dto.KbSearchOutParamDto;
import cn.xxx.rdc.knowledge.service.KbSearchPageService;
import lombok.extern.slf4j.Slf4j;
/**
* 搜索服务实现类
*
* @author xxx
* @date: 2021-08-07 08:57:45
* @Copyright: Copyright (c) 2006 - 2021
* @Company: xxx
* @Version: V1.0
*/
@Slf4j
@Service
public class KbSearchPageServiceImpl implements KbSearchPageService {
@Autowired
KbSearchPageMapper kbSearchPageMapper;
/** 注入transportClient */
@Autowired
private RestHighLevelClient restHighLevelClient;
private final String ES_INDEX = "knowledge";
@Override
public List<KbSearchOutParamDto> listByParams(Page page, KbSearchInParamDto params) {
log.info("KbSearchPageServiceImpl listByParams start");
// 1. 创建批量搜索请求,并绑定索引
SearchRequest searchRequest = new SearchRequest(this.ES_INDEX);
// 2. 构建搜索条件
SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
BoolQueryBuilder boolQueryBuilder = new BoolQueryBuilder();
Long menu_id = params.getMenuId();
if (null != menu_id && !menu_id.equals(new Long(0))) {
boolQueryBuilder.must(QueryBuilders.termQuery("menuId", menu_id));
}
String keyword = params.getKeyword();
boolQueryBuilder.should(QueryBuilders.matchQuery("title", keyword));
boolQueryBuilder.should(QueryBuilders.matchQuery("content", keyword));
// 最小匹配
boolQueryBuilder.minimumShouldMatch(1);
sourceBuilder.query(boolQueryBuilder);
// 设置分页参数
int from = (page.getPageNo() - 1) * page.getPageSize();
int size = page.getPageSize();
sourceBuilder.from(from);
sourceBuilder.size(size);
// 3. 将查询条件放入搜索请求request中
searchRequest.source(sourceBuilder);
// 4. 发起查询请求获取数据
SearchResponse response = null;
try {
response = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
} catch (IOException e) {
String msg = "查询ES异常!";
log.error(msg, e);
return null;
}
List<KbSearchOutParamDto> result = new ArrayList<KbSearchOutParamDto>();
SearchHit[] hits = response.getHits().getHits();
if (null != hits && hits.length > 0) {
for (SearchHit searchHit : hits) {
KbSearchOutParamDto d = new KbSearchOutParamDto();
d = JSONObject.parseObject(JSONObject.toJSONString(searchHit.getSourceAsMap()),
KbSearchOutParamDto.class);
result.add(d);
}
}
log.info("KbSearchPageServiceImpl listByParams end");
return result;
}
}
以上代码,跟xxx相关的都为业务代码,无需关心,只需要保留非xxx的代码即可
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