es7.x es的高亮与solr高亮查询的对比对比说明

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.common.unit.TimeValue;

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.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;

import org.elasticsearch.search.sort.ScoreSortBuilder;

import org.elasticsearch.search.sort.SortOrder;

import java.util.Map;

// 1. 构建查询条件（使用之前的查询）

BoolQueryBuilder boolQuery = QueryBuilders.boolQuery()

    .must(QueryBuilders.termQuery("title.keyword", retrievalRequest.getCollectionName()))

    .must(QueryBuilders.matchQuery("content", keyword)); // 使用matchQuery而非termQuery以支持高亮

// 2. 创建搜索源构建器

SearchSourceBuilder sourceBuilder = new SearchSourceBuilder()

    .query(boolQuery)

    .from((pageRequest.getPageNumber() - 1) * pageRequest.getPageSize()) // 分页起始位置

    .size(pageRequest.getPageSize()) // 每页大小

    .fetchSource("*", null) // 返回所有字段，相当于Solr的addProjectionOnField(Field.of("*"))

    .explain(true); // 返回得分，相当于Solr的addProjectionOnField(Field.of("score"))

// 3. 构建高亮设置

HighlightBuilder highlightBuilder = new HighlightBuilder()

    .field(new HighlightBuilder.Field("content") // 要高亮的字段

        .fragmentSize(1000) // 高亮片段长度

        .numOfFragments(1) // 返回的片段数量

        .preTags("<span style='color:red'>") // 高亮前缀

        .postTags("</span>")) // 高亮后缀

    .requireFieldMatch(true); // 只高亮匹配字段

// 4. 添加到搜索源

sourceBuilder.highlighter(highlightBuilder);

// 5. 创建搜索请求

SearchRequest searchRequest = new SearchRequest("your_index_name"); // 对应Solr的"coll"

searchRequest.source(sourceBuilder);

// 6. 执行查询

SearchResponse response = client.search(searchRequest, RequestOptions.DEFAULT);

// 7. 处理结果

for (SearchHit hit : response.getHits().getHits()) {

    // 获取原始字段

    Map<String, Object> sourceAsMap = hit.getSourceAsMap();

    // 获取高亮内容

    if (hit.getHighlightFields().containsKey("content")) {

        String highlightedContent = hit.getHighlightFields().get("content").fragments()[0].string();

        // 将高亮内容设置到返回对象中

    }

    // 获取得分

    float score = hit.getScore();

}