iot-device-monitoring-data/src/test/java/Demo1.java

import com.qniao.iot.gizwits.CloudBoxData;
import com.qniao.iot.gizwits.utils.EsRestClientUtil;
import com.qniao.iot.machine.event.MachineIotDataReceivedEvent;
import org.apache.http.HttpHost;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.impl.client.BasicCredentialsProvider;
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.RestClientBuilder;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.BoolQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.TermQueryBuilder;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.search.aggregations.AggregationBuilder;
import org.elasticsearch.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.aggregations.Aggregations;
import org.elasticsearch.search.aggregations.bucket.terms.Terms;
import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
import org.elasticsearch.search.aggregations.metrics.ParsedStats;
import org.elasticsearch.search.aggregations.metrics.ParsedTopHits;
import org.elasticsearch.search.aggregations.metrics.TopHitsAggregationBuilder;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.sort.SortOrder;

import java.io.IOException;
import java.sql.Date;
import java.time.LocalDate;
import java.time.ZoneOffset;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Demo1 {

    public static void main(String[] args) throws IOException {

        String host = "120.79.137.137:9200";
        String[] nodeIpInfos = host.split(":");
        RestClientBuilder builder = RestClient.builder(new HttpHost(nodeIpInfos[0], Integer.parseInt(nodeIpInfos[1]), "http"))
                .setRequestConfigCallback(requestConfigBuilder -> {
                    requestConfigBuilder.setConnectTimeout(10 * 60 * 1000);
                    requestConfigBuilder.setSocketTimeout(10 * 60 * 1000);
                    requestConfigBuilder.setConnectionRequestTimeout(10 * 60 * 1000);
                    return requestConfigBuilder;
                });
        CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
        credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials("elastic", "qnol26215"));
        builder.setHttpClientConfigCallback(f -> f.setDefaultCredentialsProvider(credentialsProvider));
        RestHighLevelClient client = new RestHighLevelClient(builder);



        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        /*BoolQueryBuilder queryBuilder = QueryBuilders.boolQuery()
                .must(QueryBuilders.termQuery("machineIotMac", 102104060100L));
        searchSourceBuilder.query(queryBuilder);*/

        TermsAggregationBuilder jobDurationTotal1 = AggregationBuilders.terms("stationAgg").size(100).minDocCount(1).field("machineIotMac");
        TopHitsAggregationBuilder sort = AggregationBuilders.topHits("top1").size(1).sort("reportTime", SortOrder.DESC);

        jobDurationTotal1.subAggregation(sort);
        searchSourceBuilder.aggregation(jobDurationTotal1);


        searchSourceBuilder.size(0);
        SearchRequest request = new SearchRequest("machine_iot_data_received_event_*");
        request.source(searchSourceBuilder);
        // 执行请求
        SearchResponse response = client.search(request, RequestOptions.DEFAULT);
        // 获取响应中的聚合信息
        Aggregations aggregations = response.getAggregations();
        if (RestStatus.OK.equals(response.status()) || aggregations != null) {
            Terms jobDurationTotal = aggregations.get("stationAgg");
            List<? extends Terms.Bucket> buckets = jobDurationTotal.getBuckets();
            ParsedTopHits topHits = buckets.get(0).getAggregations().get("top1");
            System.out.println(topHits.getHits().getHits()[0].getSourceAsString());

        }
    }
}