使用Java High Level REST Client操作elasticsearch

使用Java High Level REST Client操作elasticsearch

多个字段聚合分组备忘：

TermsAggregationBuilder categoryAggregationBuilder =
        AggregationBuilders.terms("byCategory").field("information_type");
TermsAggregationBuilder sourceAggregationBuilder =
        AggregationBuilders.terms("bySource").field("source");
searchSourceBuilder.aggregation(categoryAggregationBuilder).aggregation(sourceAggregationBuilder);