要使用JSON文件创建索引，我找到了以下方法：

ElasticsearchClient client = new ElasticsearchClient(
                new RestClientTransport(
                    RestClient.builder(new HttpHost("localhost", 9200, "http")).build(),
                    new JacksonJsonpMapper()));

String mappingPath = "yourPath/yourJsonFile.json";
 
JsonpMapper mapper = client._transport().jsonpMapper();
JsonParser parser = mapper.jsonProvider()
            .createParser(new StringReader(
                Files.toString(new ClassPathResource(mappingPath).getFile(), Charsets.UTF_8)));

client.indices()
    .create(createIndexRequest -> createIndexRequest.index(indexName)
        .mappings(TypeMapping._DESERIALIZER.deserialize(parser, mapper)));

然后我尝试对BulkRequest做同样的事情，但我没有找到好的方法。