Java代码实现es的聚合查询

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最新推荐文章于 2024-10-12 08:54:04 发布

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分类专栏： es 文章标签： java elasticsearch jar

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Elasticsearch 聚合查询 terms agg 多层聚合数据分析

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public Map<String, Map<String, Long>> aggTwoArgs(String indices, QueryBuilder queryBuilder, String args1, String args2, int i) throws IOException {
        Map<String, Map<String, Long>> map = new HashMap<>();
        //设置要查询的索引
        SearchRequest request = new SearchRequest().indices(indices);
        //构建搜索
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        //添加搜索长度
        sourceBuilder.size(0);
        //添加搜索条件
        sourceBuilder.query(queryBuilder);
        //设置要聚合的字段以及条数
        //设置该次聚合的名称 terms(args1)
        //以及要聚合的字段field(args1 + ".keyword") 添加keyword是对字段进行不分词查询。
        TermsAggregationBuilder agg1 = AggregationBuilders.terms(args1).field(args1 + ".keyword").size(i);
        //设置子聚合以及条数，设置返回数据中该聚合的名称 terms(args2)，以及要聚合的字段field(args2 + ".keyword")
        TermsAggregationBuilder agg2 = AggregationBuilders.terms(args2).field(args2 + ".keyword").size(i);
        //合并子聚合
        agg1.subAggregation(agg2);
        //添加聚合查询
        sourceBuilder.aggregation(agg1);
        //创建请求
        request.source(sourceBuilder);
        //发送请求
        SearchResponse response = client.search(request, RequestOptions.DEFAULT);
        Aggregations aggregations = response.getAggregations();
        Terms terms1 = aggregations.get(args1);
        for (Terms.Bucket bucket1 : terms1.getBuckets()) {
            Terms terms2 = bucket1.getAggregations().get(args2);
            Map<String, Long> map1 = new HashMap<>();
            for (Terms.Bucket bucket2 : terms2.getBuckets()) {
                map1.put(bucket2.getKeyAsString(), bucket2.getDocCount());
            }
            map.put(bucket1.getKeyAsString(), map1);
        }
        return map;

    }