直接上代碼:java
// 建立一個查詢條件對象 BoolQueryBuilder queryBuilder = QueryBuilders.boolQuery(); // 拼接查詢條件 queryBuilder.should(QueryBuilders.termQuery("字段", "值")); // 建立聚合查詢條件 TermsAggregationBuilder agg = AggregationBuilders.terms("聚合名稱,自定義,取出時會用到").field("聚合字段").size(100);// size是查詢聚合出來的條數 // 建立查詢對象 SearchQuery build = new NativeSearchQueryBuilder() .withQuery(queryBuilder) //添加查詢條件 .addAggregation(agg) // 添加聚合條件 .withPageable(PageRequest.of(0, 1)) //符合查詢條件的文檔分頁(不是聚合的分頁) .build(); // 執行查詢 AggregatedPage<TestEntity> testEntities = elasticsearchTemplate.queryForPage(build, TestEntity.class); // 取出聚合結果 Aggregations entitiesAggregations = propertyInfoEntities.getAggregations(); Terms terms = (Terms)propertyInfoEntities.getAggregation("聚合名稱,以前自定義的"); // 遍歷取出聚合字段列的值,與對應的數量 for (Terms.Bucket bucket : terms.getBuckets()) { String keyAsString = bucket.getKeyAsString(); // 聚合字段列的值 long docCount = bucket.getDocCount();// 聚合字段對應的數量 }
多字段聚合:數據結構
// 建立一個查詢條件對象 BoolQueryBuilder queryBuilder = QueryBuilders.boolQuery(); // 拼接查詢條件 queryBuilder.should(QueryBuilders.termQuery("字段", "值")); // 建立聚合查詢條件 TermsAggregationBuilder agg1 = AggregationBuilders.terms("聚合名稱2").field(聚合字段2).size(100) TermsAggregationBuilder agg = AggregationBuilders.terms("聚合名稱1").field("聚合字段1").size(100).subAggregation(agg1)//拼接上上一個聚合條件 // 建立查詢對象 SearchQuery build = new NativeSearchQueryBuilder() .withQuery(queryBuilder) //添加查詢條件 .addAggregation(agg) // 添加聚合條件 .withPageable(PageRequest.of(0, 1)) //符合查詢條件的文檔分頁(不是聚合的分頁) .build(); // 執行查詢 AggregatedPage<TestEntity> testEntities = elasticsearchTemplate.queryForPage(build, TestEntity.class); // 取出聚合結果 Aggregations entitiesAggregations = propertyInfoEntities.getAggregations(); Terms terms = (Terms)propertyInfoEntities.getAggregation("聚合名稱"); // 遍歷最外層的聚合結果 for (Terms.Bucket bucket : terms.getBuckets()) { String keyAsString = bucket.getKeyAsString(); // 聚合字段列的名稱 long docCount = bucket.getDocCount();// 聚合字段對應的數量 // 獲取內部的聚合字段信息 Aggregations aggregations = bucket.getAggregations(); Terms terms2 = aggregations.get("聚合名稱2"); // 遍歷獲取agg1的聚合信息 for (Terms.Bucket bucket1 : terms2.getBuckets()) { String keyAsString2 = bucket.getKeyAsString(); // 聚合字段列的名稱 long docCount2 = bucket.getDocCount();// 聚合字段對應的數量 } }
更多字段聚合按照以上類推,若是實在對於結構不理解能夠將查詢語句打印出來,將打印語句拿到Kibana之類的查詢工具中查詢看下結構,或者直接Debug看下數據結構,就比較好理解了elasticsearch