es java 聚合方法——聚合後根據count排序並取前2條資料
阿新 • • 發佈:2019-02-01
聚合後根據count排序並取前2條資料
/**
* 聚合後根據count排序並取前2條資料
*/
@Test
public void orderAfterAggregation(){
SearchResponse response = client.prepareSearch("twitter").setTypes("tweet")
.addAggregation(AggregationBuilders.terms("countAgg").field("age.keyword")
.order (Terms.Order.count(false)).size(2)) //true:正序 false:倒序
.get();
Terms countAgg = response.getAggregations().get("countAgg");
for (Terms.Bucket entry : countAgg.getBuckets()) {
System.out.println("age:"+entry.getKey()+"---------"+"count:"+entry.getDocCount());
}
}
es版本號:5.5.1