java查询elasticsearch聚合

java查es多分组聚合:

SearchRequestBuilder requestBuilderOfLastMonth = transportClient.prepareSearch(TYPE_NAME + "_" + date + "*").setTypes(TYPE_NAME);
TermsAggregationBuilder groupByLastMonthWeek = AggregationBuilders.terms("groupByWeek").field("week")
        .subAggregation(AggregationBuilders.terms("groupByHour").field("hour")
                .subAggregation(AggregationBuilders.sum("sumDown").field("downOutput")))
                    .size(100);

requestBuilderOfLastMonth.setQuery(boolQueryBuilder).addAggregation(groupByLastMonthWeek);
SearchResponse responseOfLastMonth = requestBuilderOfLastMonth.get();

    Terms termsfOfLastMonth = responseOfLastMonth.getAggregations().get("groupByWeek");
    for (Terms.Bucket entry : termsfOfLastMonth.getBuckets()) {
        String oneWeek = entry.getKey().toString();
        Terms groupByHour = entry.getAggregations().get("groupByHour");
        for (Terms.Bucket entry2 : groupByHour.getBuckets()) {
            Map<String, Object> kvMap = new HashMap<>();
            String hour = entry2.getKey().toString();
            Sum downSum = entry2.getAggregations().get("sumDown");
            double sumValue = downSum.getValue();
            kvMap.put(hour, sumValue);
            lastMonthWeekMap.put(oneWeek, kvMap);
        }
    }
查询的核心代码,client是TransportClient