(25) ElasticSearch java project aggregate query terms, filter, filters, range, missing

　　1, grouped by age, number of queries each group

@Test
    public void testTerms() throws IOException, InterruptedException, ExecutionException {
        //指定集群
        Settings settings = Settings.builder().put("cluster.name","my-application").build(); 
        //创建客户端
        TransportClient client = new PreBuiltTransportClient(settings)
                                .addTransportAddress ( new new TransportAddress (InetAddress.getByName ( "192.168.43.151"), 9300 ));
         // create a query object, grouped by age, the number of queries each group 
        AggregationBuilder agg = AggregationBuilders.terms ( "terms" ) field. ( "Age" );
         // execute the query 
        SearchResponse SR = client.prepareSearch ( "lib3" )
                                  .addAggregation (agg)
                                  .execute()
                                  .actionGet();
        //获取结果
        Terms terms = sr.getAggregations().get("terms");
        //遍历
        for(Terms.Bucket entry:terms.getBuckets()) {
            System.out.println(entry.getKey()+"----------"+entry.getDocCount());
        }
        client.close();
   }

　　2, filter query field is the age of 20 documents

@Test
    public void testFilter() throws IOException, InterruptedException, ExecutionException {
        //指定集群
        Settings settings = Settings.builder().put("cluster.name","my-application").build(); 
        //创建客户端
        TransportClient client = new PreBuiltTransportClient(settings)
                                .addTransportAddress ( new new TransportAddress (InetAddress.getByName ( "192.168.43.151"), 9300 ));
         // the specified query conditions, age field 20 of 
        the QueryBuilder QueryBuilders.termQuery = Query ( "Age", 29 );
         // filtering query conditions, filtering out documents that satisfy the query 
        AggregationBuilder AGG = AggregationBuilders.filter ( "filter" , query);
         // execute the query 
        SearchResponse SR = client.prepareSearch ( "lib3" )
                                  .addAggregation (agg)
                                  .execute()
                                  .actionGet();
        // Get a result 
        the Filter filter = sr.getAggregations () GET ( "filter." );
         // number of output 
        System.out.println (filter.getDocCount ());
        client.close();
   }

　　3, filter query interests field contains changge, hejiu documents

@Test
    public void testFilters() throws IOException, InterruptedException, ExecutionException {
        //指定集群
        Settings settings = Settings.builder().put("cluster.name","my-application").build(); 
        //创建客户端
        TransportClient client = new PreBuiltTransportClient(settings)
                                .addTransportAddress ( new new TransportAddress (InetAddress.getByName ( "192.168.43.151"), 9300 ));
         // the specified query conditions, interests of Changge field contains 
        the QueryBuilder QueryBuilders.termQuery = Query ( "Interests", "Changge" );
         // specify the query criteria, the hejiu Interests field contains 
        the QueryBuilder query2 = QueryBuilders.termQuery ( "Interests", "hejiu" );
         // filter query, query or a document satisfying filtered of query2 
        AggregationBuilder AGG = AggregationBuilders.filters ( "filters" ,
                                                             new new FiltersAggregator.KeyedFilter ( "condition 1", Query),
                                                             new new FiltersAggregator.KeyedFilter ( "condition 2" , query2));
         // execute the query 
        SearchResponse SR = client.prepareSearch ( "lib3" )
                                  .addAggregation (agg)
                                  .execute()
                                  .actionGet();
        // Get a result 
        the Filters Filters = sr.getAggregations () GET ( "Filters." );
         // traversal, the two specified filter, the output data of two, key are Conditions 1 and 2 
        for (entry Filters.Bucket : filters.getBuckets ()) {
            System.out.println(entry.getKey()+"----------"+entry.getDocCount());
        }
        client.close();
   }

　　4, the statistics were younger than 50, between 25 and 50, larger than the number of documents 25

@Test
    public void testRange() throws IOException, InterruptedException, ExecutionException {
        //指定集群
        Settings settings = Settings.builder().put("cluster.name","my-application").build(); 
        //创建客户端
        TransportClient client = new PreBuiltTransportClient(settings)
                                .addTransportAddress ( new new TransportAddress (InetAddress.getByName ( "192.168.43.151"), 9300 ));
         // statistical data set 3 is younger than 50, between 25 and 50, greater than 25 
        AggregationBuilder agg = AggregationBuilders.range ( " the Range " )
                                                    .field("age")
                                                    .addUnboundedTo(50)//( ,to)
                                                    .addRange(25,50)//[from,to)
                                                    .addUnboundedFrom(25);//[from, )
        //执行查询
        SearchResponse sr = client.prepareSearch("lib3")
                                  .addAggregation (agg)
                                  .execute()
                                  .actionGet();
        // Get a result 
        the Range = R & lt sr.getAggregations () GET ( "Range." );
         // iterate outputs three Key, * - 50.0; 25.0-50.0; 25.0- * 
        for (Range.Bucket entry: r.getBuckets ()) {
            System.out.println(entry.getKey()+"----------"+entry.getDocCount());
        }
        client.close();
   }

　　5, the number of missing statistics document the age field

@Test
    public void testMissing() throws IOException, InterruptedException, ExecutionException {
        //指定集群
        Settings settings = Settings.builder().put("cluster.name","my-application").build(); 
        //创建客户端
        TransportClient client = new PreBuiltTransportClient(settings)
                                .addTransportAddress ( new new TransportAddress (InetAddress.getByName ( "192.168.43.151"), 9300 ));
         // Statistics missing fields age of the document 
        . AggregationBuilder AGG = AggregationBuilders.missing ( "Missing") Field, ( "age" );
         // execute the query 
        SearchResponse SR = client.prepareSearch ( "lib3" )
                                  .addAggregation (agg)
                                  .execute()
                                  .actionGet();
        // Get Results 
        Aggregation sr.getAggregations aggregation = () GET ( "Missing." );
         // output 
        System.out.println (aggregation.toString ());
        client.close();
   }