我们如何在ElasticSearch 7.4.2Java High Level REST客户端中创建IndexRequest？

import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.xcontent.XContentType;

import java.io.IOException;

public class CreateIndexRequestExample {
    public static void main(String[] args) {
        // 创建RestHighLevelClient实例
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder("localhost:9200"));

        // 创建IndexRequest
        IndexRequest request = new IndexRequest("your_index_name");
        request.id("your_document_id"); // 设置文档ID，可选
        request.source("{\"field1\":\"value1\",\"field2\":\"value2\"}", XContentType.JSON);

        try {
            // 执行IndexRequest
            IndexResponse response = client.index(request, RequestOptions.DEFAULT);
            System.out.println("Index created: " + response.getIndex());
            System.out.println("Document ID: " + response.getId());
        } catch (IOException e) {
            e.printStackTrace();
        }

        // 关闭RestHighLevelClient
        try {
            client.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}