使用Kibana和Java在Elastic search中获取特定字段

import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.FetchSourceContext;
import org.elasticsearch.search.sort.SortOrder;

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

        // 创建搜索请求
        SearchRequest searchRequest = new SearchRequest("index_name");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();

        // 设置查询条件
        searchSourceBuilder.query(QueryBuilders.matchAllQuery());
        searchSourceBuilder.fetchSource(new FetchSourceContext(true, new String[]{"field1", "field2"}, null));
        searchSourceBuilder.sort("timestamp", SortOrder.DESC);
        searchSourceBuilder.size(10);

        searchRequest.source(searchSourceBuilder);

        try {
            // 执行搜索请求
            SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);

            // 处理搜索结果
            // ...

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