前言

本节实现条件查询中的聚合查询，分组查询

实现

聚合查询 ESTest_Doc_Cond_Query_Agg.java

package com.zwy.es;

import org.apache.http.HttpHost;
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.QueryBuilders;
import org.elasticsearch.index.query.TermQueryBuilder;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.aggregations.AggregationBuilder;
import org.elasticsearch.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;

import java.io.IOException;

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

        //
        RestHighLevelClient esClient = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http"))
        );

        // 聚合查询查询数据
        SearchRequest request = new SearchRequest();
        request.indices("users");

        SearchSourceBuilder builer = new SearchSourceBuilder();
        AggregationBuilder aggregationBuilder = AggregationBuilders.max("maxAge").field("age");

        builer.aggregation(aggregationBuilder);

        request.source(builer);
        SearchResponse response = esClient.search(request, RequestOptions.DEFAULT);

        SearchHits hits = response.getHits();

        System.out.println(hits.getTotalHits());  // 打印
        System.out.println(response.getTook());  // 打印

        for (SearchHit hit : hits) {
            System.out.println(hit.getSourceAsString());
        }

        // 关闭ES客户端
        esClient.close();

    }
}

分组查询 ESTest_Doc_Cond_Query_Group.java

package com.zwy.es;

import org.apache.http.HttpHost;
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.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.aggregations.AggregationBuilder;
import org.elasticsearch.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.builder.SearchSourceBuilder;

import java.io.IOException;

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

        //
        RestHighLevelClient esClient = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http"))
        );

        // 分组查询查询数据
        SearchRequest request = new SearchRequest();
        request.indices("users");

        SearchSourceBuilder builer = new SearchSourceBuilder();
        AggregationBuilder aggregationBuilder = AggregationBuilders.terms("ageGroup").field("age");
        builer.aggregation(aggregationBuilder);

        request.source(builer);
        SearchResponse response = esClient.search(request, RequestOptions.DEFAULT);

        SearchHits hits = response.getHits();

        System.out.println(hits.getTotalHits());  // 打印
        System.out.println(response.getTook());  // 打印

        for (SearchHit hit : hits) {
            System.out.println(hit.getSourceAsString());
        }

        // 关闭ES客户端
        esClient.close();

    }
}

文件结构

运行

运行ESTest_Doc_Cond_Query_Agg.java 运行ESTest_Doc_Cond_Query_Group.java