es aggregation java_Java Elasticsearch 聚合查询(Aggregation)详解

Elasticsearch中的聚合查询，类似SQL的SUM/AVG/COUNT/GROUP BY分组查询，主要用于统计分析场景。

这里主要介绍Java Elasticsearch 聚合查询的写法，如果不了解ES聚合查询，请参考 ES聚合查询基本概念和用法。

例子

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.RestClientBuilder;

import org.elasticsearch.client.RestHighLevelClient;

import org.elasticsearch.index.query.*;

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.agg