springboot 使用 Spring Data Elasticsearch 查询结果高亮显示-马育民老师

# 说明

可以像百度那样，高亮显示匹配的关键字，如下图：

[![](/upload/0/0/1IX32aw7RpsY.png)](/upload/0/0/1IX32aw7RpsY.png)

# 代码

```
package com.std.ctrl;

import com.std.es.entity.Toutiao;
import org.elasticsearch.index.query.BoolQueryBuilder;
import org.elasticsearch.index.query.MatchPhraseQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.sort.SortBuilders;
import org.elasticsearch.search.sort.SortOrder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
import org.springframework.data.elasticsearch.core.SearchHit;
import org.springframework.data.elasticsearch.core.SearchHits;
import org.springframework.data.elasticsearch.core.query.NativeSearchQuery;
import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
@RequestMapping("/hightlight")
public class HighlightCtrl {

@Autowired
    private ElasticsearchRestTemplate template;

/**
     * 高亮显示
     */
    @RequestMapping("/test")
    public void test() {
        //定义高亮字段
        HighlightBuilder.Field highlightField = new HighlightBuilder.Field("title");

NativeSearchQuery nativeSearchQuery = new NativeSearchQueryBuilder()
 //查询条件
 .withQuery(QueryBuilders.matchPhraseQuery("title","java"))
 //分页
 .withPageable(PageRequest.of(0, 5))
 //排序
 .withSort(SortBuilders.fieldSort("like").order(SortOrder.DESC))
 //高亮字段显示
 .withHighlightFields(highlightField)
 .build();
 SearchHits<Toutiao> shs = template.search(nativeSearchQuery, Toutiao.class);
 List<SearchHit<Toutiao>> list=shs.getSearchHits();
 for(SearchHit<Toutiao> item:list){
 //打印高亮字段
 List<String> highlightlist=item.getHighlightField("title");
 for(String highlight:highlightlist){
 System.out.println(highlight);
 }

Toutiao toutiao=item.getContent();
            System.out.println(toutiao);
            System.out.println("--------");
        }
    }

/**
 * 高亮显示，且定义标签
 */
 @RequestMapping("/test2")
 public void test2() {
 //定义高亮字段
 HighlightBuilder.Field highlightField = new HighlightBuilder.Field("title");
 //设置高亮标签
 highlightField.preTags("").postTags("");

Toutiao toutiao=item.getContent();
            System.out.println(toutiao);
            System.out.println("--------");
        }
    }

/**
 * 多个查询条件，可以设置多个高亮字段
 */
 @RequestMapping("/test3")
 public void test3() {
 //定义高亮字段
 HighlightBuilder.Field titleField = new HighlightBuilder.Field("title");
 //设置高亮标签
// titleField.preTags("").postTags("");

HighlightBuilder.Field contentField = new HighlightBuilder.Field("content");
// contentField.preTags("").postTags("");

MatchPhraseQueryBuilder titleQuery = QueryBuilders.matchPhraseQuery("title", "java");
        MatchPhraseQueryBuilder contentQuery = QueryBuilders.matchPhraseQuery("content", "java");

BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery()
                .must(titleQuery)
                .must(contentQuery);

NativeSearchQuery nativeSearchQuery = new NativeSearchQueryBuilder()
                //查询条件
                .withQuery(boolQueryBuilder)
                //分页
                .withPageable(PageRequest.of(0, 5))
                //排序
                .withSort(SortBuilders.fieldSort("like").order(SortOrder.DESC))
                //高亮字段显示
                .withHighlightFields(titleField,contentField)
                .build();

SearchHits<Toutiao> shs = template.search(nativeSearchQuery, Toutiao.class);
 List<SearchHit<Toutiao>> list=shs.getSearchHits();
 for(SearchHit<Toutiao> item:list){
 //打印高亮字段
 List<String> titleList=item.getHighlightField("title");
 for(String highlight:titleList){
 System.out.println(highlight);
 }

List<String> contentList=item.getHighlightField("content");
 for(String highlight:contentList){
 System.out.println(highlight);
 }

Toutiao toutiao=item.getContent();
            System.out.println(toutiao);
            System.out.println("--------");
        }
    }
}
```

原文出处：/show_1IX32awQIzTZ.html