使用spring-data-elasticsearch和搜索相似的文档，如何获得相似度得分？

<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-elasticsearch</artifactId>
</dependency>

@Configuration
@EnableElasticsearchRepositories(basePackages = "com.example.repository")
public class ElasticsearchConfig {

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

    @Bean
    public ElasticsearchRestTemplate elasticsearchTemplate() {
        return new ElasticsearchRestTemplate(elasticsearchClient());
    }
}

@Document(indexName = "my_index", type = "my_type")
public class MyDocument {

    @Id
    private String id;
    
    @Field(type = FieldType.Text)
    private String text;
    
    // 其他字段...
    
    // getters and setters
}

public interface MyDocumentRepository extends ElasticsearchRepository<MyDocument, String> {

    List<MyDocument> findByText(String text);
}

@Autowired
private MyDocumentRepository repository;

// ...

String searchText = "要搜索的文本";
List<MyDocument> documents = repository.findByText(searchText);

for (MyDocument document : documents) {
    Explanation explanation = elasticsearchTemplate().getClient().explain(
        new ExplainRequest("my_index", "my_type", document.getId()).query(
            QueryBuilders.matchQuery("text", searchText)
        )
    ).getExplanation();

    float score = explanation.getValue(); // 获取相似度得分
    System.out.println("相似度得分：" + score);
}