javaAPI操作ES分组聚合

连接es的客户端使用的 TransportClient

SearchRequestBuilder requestBuilder = transportClient.prepareSearch(indies).setTypes(TYPE_NAME);
 BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
 AggregationBuilder groupByType = AggregationBuilders.terms("分组别名").field("分组字段");
 AggregationBuilder sumDownOutputSum = AggregationBuilders.sum("聚合别名").field("聚合字段");
　　//sub是子聚合
 requestBuilder.setQuery(boolQueryBuilder).addAggregation(groupByType.subAggregation(sumDownOutputSum));

 SearchResponse response = requestBuilder.get();
 Terms terms = response.getAggregations().get("groupByType");

 for (Terms.Bucket bucket : terms.getBuckets()) {
     Map<String, Object> resMap = new HashMap<>();
     Sum  downOutputSum = bucket.getAggregations().get("downOutputSum");
     double value = downOutputSum.getValue();
     Object key = bucket.getKey();
    //key 是分组字段
　　//value是聚合value　　

 }