使用spring数据获取elasticsearch中某个字段的所有不同值

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

spring.data.elasticsearch.cluster-nodes=localhost:9200

@Document(indexName = "your_index_name", type = "your_type_name")
public class YourEntity {
    @Id
    private String id;
    
    @Field(type = FieldType.Keyword)
    private String yourField;
    
    // Getters and setters
}

public interface YourEntityRepository extends ElasticsearchRepository<YourEntity, String> {
    List<YourEntity> findByYourField(String yourFieldValue);
}

@Autowired
private YourEntityRepository yourEntityRepository;

public List<String> getAllDistinctValuesOfYourField() {
    List<YourEntity> entities = yourEntityRepository.findAll();
    Set<String> distinctValues = new HashSet<>();
    
    for (YourEntity entity : entities) {
        distinctValues.add(entity.getYourField());
    }
    
    return new ArrayList<>(distinctValues);
}