如何在使用Java API创建索引时使用模板

import org.elasticsearch.action.admin.indices.create.CreateIndexRequest;
import org.elasticsearch.action.admin.indices.create.CreateIndexResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.xcontent.XContentType;

import java.io.IOException;

public class IndexCreationExample {
    public static void main(String[] args) {
        // 创建Elasticsearch客户端
        RestHighLevelClient client = new RestHighLevelClient();

        // 创建索引模板
        String indexTemplate = "{\n" +
                "  \"index_patterns\": [\"my_index*\"],\n" +
                "  \"settings\": {\n" +
                "    \"number_of_shards\": 1,\n" +
                "    \"number_of_replicas\": 1\n" +
                "  },\n" +
                "  \"mappings\": {\n" +
                "    \"properties\": {\n" +
                "      \"title\": {\n" +
                "        \"type\": \"text\"\n" +
                "      },\n" +
                "      \"description\": {\n" +
                "        \"type\": \"text\"\n" +
                "      }\n" +
                "    }\n" +
                "  }\n" +
                "}";

        // 创建索引请求
        CreateIndexRequest request = new CreateIndexRequest("my_index");
        request.source(indexTemplate, XContentType.JSON);

        try {
            // 发送创建索引请求
            CreateIndexResponse response = client.indices().create(request, RequestOptions.DEFAULT);
            boolean acknowledged = response.isAcknowledged();
            boolean shardsAcknowledged = response.isShardsAcknowledged();
            System.out.println("Index creation acknowledged: " + acknowledged);
            System.out.println("Shards creation acknowledged: " + shardsAcknowledged);
        } catch (IOException e) {
            e.printStackTrace();
        }

        // 关闭Elasticsearch客户端
        try {
            client.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}