ElasticSearch RestHighLevClient 之聚合操作

整合应用

// 求不同价格的数量
@Test
public void testAggsPrice() throws IOException {
  SearchRequest searchRequest = new SearchRequest("fruit");
  SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
  sourceBuilder.aggregation(AggregationBuilders.terms("group_price").field("price"));
  searchRequest.source(sourceBuilder);
  SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
  Aggregations aggregations = searchResponse.getAggregations();
  ParsedDoubleTerms terms = aggregations.get("group_price");
  Listextends Terms.Bucket> buckets = terms.getBuckets();
  for (Terms.Bucket bucket : buckets) {
    System.out.println(bucket.getKey() + ", "+ bucket.getDocCount());
  }
}

// 求不同名称的数量
@Test
public void testAggsTitle() throws IOException {
  SearchRequest searchRequest = new SearchRequest("fruit");
  SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
  sourceBuilder.aggregation(AggregationBuilders.terms("group_title").field("title"));
  searchRequest.source(sourceBuilder);
  SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
  Aggregations aggregations = searchResponse.getAggregations();
  ParsedStringTerms terms = aggregations.get("group_title");
  Listextends Terms.Bucket> buckets = terms.getBuckets();
  for (Terms.Bucket bucket : buckets) {
  	System.out.println(bucket.getKey() + ", "+ bucket.getDocCount());
  }
}

// 求和
@Test
public void testAggsSum() throws IOException {
  SearchRequest searchRequest = new SearchRequest("fruit");
  SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
  sourceBuilder.aggregation(AggregationBuilders.sum("sum_price").field("price"));
  searchRequest.source(sourceBuilder);
  SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
  ParsedSum parsedSum = searchResponse.getAggregations().get("sum_price");
  System.out.println(parsedSum.getValue());
}