如何在Java中从elasticsearch中获取命中数据

import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.MatchQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;

import java.io.IOException;
import java.util.Map;

public class ElasticsearchExample {
    public static void main(String[] args) {
        // 创建elasticsearch客户端连接
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder("localhost:9200"));

        // 构建搜索请求
        SearchRequest searchRequest = new SearchRequest("index_name");
        MatchQueryBuilder matchQuery = QueryBuilders.matchQuery("field_name", "search_keyword");
        searchRequest.source().query(matchQuery);

        try {
            // 发送搜索请求并获取响应
            SearchResponse response = client.search(searchRequest, RequestOptions.DEFAULT);

            // 获取命中数据
            SearchHits hits = response.getHits();
            for (SearchHit hit : hits) {
                // 处理命中数据
                Map<String, Object> source = hit.getSourceAsMap();
                System.out.println(source);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

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