elasticsearch7.6.2集成springboot2.2.6----demo

package com.zys.es.demo762.serviceImpl;

import com.alibaba.fastjson.JSON;
import com.zys.es.demo762.entity.Content;
import com.zys.es.demo762.service.EsService;
import com.zys.es.demo762.utils.JsoupUtil;
import org.elasticsearch.action.bulk.BulkRequest;
import org.elasticsearch.action.bulk.BulkResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchRequestBuilder;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.text.Text;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.query.MatchQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.TermQueryBuilder;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightField;
import org.elasticsearch.search.fetch.subphase.highlight.Highlighter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@Service
public class EsServiceImpl implements EsService {
    @Autowired
    RestHighLevelClient restHighLevelClient;

    /**
     * 批量写入es
     */
    public Boolean parseContent(String keyword) throws Exception {
        //获取京东数据
        List<Content> contents = JsoupUtil.getContent(keyword);
        //获取到的数据写入到es中
        BulkRequest bulkRequest = new BulkRequest();
        bulkRequest.timeout("2s");
        for (int i=0;i<contents.size();i++) {
            bulkRequest.add(new IndexRequest("jd_index").source(JSON.toJSONString(contents.get(i)),XContentType.JSON));

        }
        BulkResponse bulk = restHighLevelClient.bulk(bulkRequest, RequestOptions.DEFAULT);

        return  !bulk.hasFailures();
    }

    /**
     * es分页搜索
     */
    public List<Map<String ,Object>> search(String keyword, int from,int size) throws IOException {
        //搜索
        SearchRequest searchRequest = new SearchRequest("jd_index");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();

        //分页信息
        searchSourceBuilder.from(from);
        searchSourceBuilder.size(size);
        //精准匹配

//        TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("title", keyword);
        //模糊匹配
        MatchQueryBuilder matchQueryBuilder = QueryBuilders.matchQuery("title", keyword);
        searchSourceBuilder.query(matchQueryBuilder);
        //设置过期时间
        searchSourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));
        //查询搜索
        searchRequest.source(searchSourceBuilder);
        SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
        //解析封装结果
        List<Map<String ,Object>> list = new ArrayList<>();
        for (SearchHit hit : searchResponse.getHits().getHits()) {
            list.add(hit.getSourceAsMap());
            System.out.println(hit.getSourceAsMap().get("title")+"--------------");
        }
        return  list;
    }


    /**
     * es分页高亮搜索
     */
    public List<Map<String ,Object>> searchHighlight(String keyword, int from,int size) throws IOException {
        //搜索
        SearchRequest searchRequest = new SearchRequest("jd_index");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        //分页信息
        searchSourceBuilder.from(from);
        searchSourceBuilder.size(size);
        //精准匹配
        TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("title", keyword);
        //模糊匹配
//        MatchQueryBuilder matchQueryBuilder = QueryBuilders.matchQuery("title", keyword);
        searchSourceBuilder.query(termQueryBuilder);
        //设置过期时间
        searchSourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));
        //高亮
        HighlightBuilder highlightBuilder = new HighlightBuilder();
        highlightBuilder.field("title");
        //多个高亮显示
        highlightBuilder.requireFieldMatch(false);
        highlightBuilder.preTags("<span style='color:red'>");
        highlightBuilder.postTags("</span>");
        searchSourceBuilder.highlighter(highlightBuilder);
        //查询搜索
        searchRequest.source(searchSourceBuilder);
        SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
        //解析封装结果
        List<Map<String ,Object>> list = new ArrayList<>();
        for (SearchHit hit : searchResponse.getHits().getHits()) {
            //原来的值
            Map<String, Object> sourceAsMap = hit.getSourceAsMap();
            //解析高亮的字段
            Map<String, HighlightField> highlightFields = hit.getHighlightFields();
            HighlightField title = highlightFields.get("title");
            if(title!=null){
                Text[] fragments = title.fragments();
                String newTitle="";
                for (Text text:fragments){
                    newTitle+=text;
                }
                sourceAsMap.put("title",newTitle);
            }
            list.add(hit.getSourceAsMap());
        }
        return  list;
    }
}