使用spring-data-elasticsearch，如何更新字段映射？

@Document(indexName = "your_index_name", type = "your_type_name")
public class YourDocumentClass {
    // 定义字段
    // ...
}

public interface YourDocumentRepository extends ElasticsearchRepository<YourDocumentClass, String> {
    // 定义方法
    // ...
}

spring.data.elasticsearch.cluster-nodes=your_elasticsearch_cluster_nodes
spring.data.elasticsearch.cluster-name=your_elasticsearch_cluster_name

@Autowired
private ElasticsearchOperations elasticsearchOperations;

public void updateFieldMapping() {
    IndicesAdminClient indicesAdminClient = elasticsearchOperations.getClient().admin().indices();
    PutMappingRequest putMappingRequest = new PutMappingRequest("your_index_name")
            .type("your_type_name")
            .source("your_field_name", "your_field_type");
    indicesAdminClient.putMapping(putMappingRequest).actionGet();
}