用RestHighLevelClient实现Spring数据的弹性搜索

<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>elasticsearch-rest-high-level-client</artifactId>
    <version>7.15.0</version>
</dependency>

@Configuration
public class ElasticsearchConfig {

    @Bean
    public RestHighLevelClient restHighLevelClient() {
        RestClientBuilder builder = RestClient.builder(new HttpHost("localhost", 9200, "http"));
        return new RestHighLevelClient(builder);
    }
}

@Autowired
private RestHighLevelClient restHighLevelClient;

public List<YourEntity> search(String keyword) throws IOException {
    SearchRequest searchRequest = new SearchRequest("your_index");
    SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
    QueryBuilder queryBuilder = QueryBuilders.matchQuery("your_field", keyword);
    searchSourceBuilder.query(queryBuilder);
    searchRequest.source(searchSourceBuilder);

    SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
    SearchHits searchHits = searchResponse.getHits();
    List<YourEntity> results = new ArrayList<>();
    for (SearchHit hit : searchHits.getHits()) {
        YourEntity entity = new YourEntity();
        // 解析搜索结果并设置到实体对象中
        results.add(entity);
    }
    return results;
}