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| @Test
void testAggredation() throws IOException {
//1. 准备Request
SearchRequest request = new SearchRequest("hotel");
//2. 准备DSL
//2.1 设置size
request.source().size(0);
//2.2 聚合
request.source().aggregation(AggregationBuilders
.terms("brandAgg")
.field("brand")
.size(10)
);
//3. 发出请求
SearchResponse response = client.search(request,RequestOptions.DEFAULT);
//4. 解析结果
Aggregations aggregations = response.getAggregations();
//4.1 根据聚合名称获取聚合结果
Terms brandTerms = aggregations.get("brandAgg");
//4.2 获取buckets
List<? extends Terms.Bucket> buckets = brandTerms.getBuckets();
//4.3 遍历
for(Terms.Bucket bucket : buckets){
//4.4 获取key
String key = bucket.getKeyAsString();
System.out.println(key);
}
}
|
