统计索引中某个字段的个数
public class ESTest_Doc_Query {
? ? public static void main(String[] args) throws Exception {
? ? ? ? //创建ES客户端
? ? ? ? RestHighLevelClient esClient = new RestHighLevelClient(
? ? ? ? ? ? ? ? RestClient.builder(new HttpHost("localhost",9200,"http"))
? ? ? ? );
? ? ? ? //12、统计个数
? ? ? ? SearchRequest request = new SearchRequest();
? ? ? ? request.indices("user");
? ? ? ? SearchSourceBuilder builder = new SearchSourceBuilder();
? ? ? ? //统计年龄在30-40之间的有多少
? ? ? ? AggregationBuilder ?aggregationBuilder = AggregationBuilders.count("ageCount").field("age");
? ? ? ? RangeQueryBuilder rangeQueryBuilder = QueryBuilders.rangeQuery("age").from(30,true).to(40,true);
? ? ? ? builder.aggregation(aggregationBuilder);
? ? ? ? builder.query(rangeQueryBuilder);
? ? ? ? request.source(builder);
? ? ? ? SearchResponse response = esClient.search(request, RequestOptions.DEFAULT);
? ? ? ? System.out.println("s:"+response.toString());
? ? ? ? SearchHits hits = response.getHits();
? ? ? ? System.out.println(hits.getTotalHits());
? ? ? ? System.out.println(response.getTook());
? ? ? ? for(SearchHit hit : hits){
? ? ? ? ? ? System.out.println(hit.getSourceAsString());
? ? ? ? }
? ? ? ??
? ? ? ? //关闭ES客户端
? ? ? ? esClient.close();
? ? }
}
年龄在30-40之间的有4个：
?