06、ES实战：时间聚合-程序员快看-教程，程序员编程资料站

Java时间聚合

AggregationBuilder 构建聚合查询；
AggregationBuilders 类可以调用很多聚合的方法，dateRange 可以对时间范围进行聚合。
示例如下：

public class EsAggregation{
   
     
    public void searchAggregation(TransportClient client){
   
     
        AggregationBuilder aggregation = AggregationBuilders
            .dateRange("agg")
            .field("inputtime")
            .format("yyyy-MM-dd HH:mm:ss")
            // from 1950 to 1960 (excluded)
            .addRange("2016-7-21 00:00:01", "2016-7-21 00:00:02");
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        sourceBuilder.aggregation(aggregation);

        System.out.println(sourceBuilder.toString());

        SearchResponse response =  client
                    .prepareSearch("pointdata")
                    .setTypes("pointdata")
                    .setQuery(QueryBuilders.queryStringQuery
                        ("W3.UNIT1.10LBG01CP301"))
                    .setSource(sourceBuilder)
                    .execute()
                    .actionGet();

        SearchHits hits = response.getHits();
        for(int i = 0; i < hits.getHits().length; i++) {
   
     
            System.out.println(i+":"+hits.getHits()[i].getSourceAsString());
        }

        // sr is here your SearchResponse object
        Range agg = response.getAggregations().get("agg");

        // For each entry
        for (Range.Bucket entry : agg.getBuckets()) {
   
     
             // Date range as key
             String key = entry.getKeyAsString(); 
             // Date bucket from as a Date  引用import org.joda.time.DateTime;            
             DateTime fromAsDate = (DateTime) entry.getFrom(); 
             // Date bucket to as a Date  
             DateTime toAsDate = (DateTime) entry.getTo(); 
             // Doc count      
             long docCount = entry.getDocCount();                

             System.out.println("key [{"+key+"}], from [{"+fromAsDate+"}], "+
                 "to [{"+toAsDate+"}], doc_count [{"+docCount+"}]");
            }
    }
}