java操作elasticsearch实现组合桶聚合

1、terms分组查询

//分组聚合
@Test
public void test40() throws UnknownHostException{
    //1、指定es集群  cluster.name 是固定的key值，my-application是ES集群的名称
    Settings settings = Settings.builder().put("cluster.name", "my-application").build();
    //2.创建访问ES服务器的客户端
    TransportClient client = new PreBuiltTransportClient(settings)
            .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.1.94"), 9300));
    //以年龄分组，组名为：terms
    AggregationBuilder builder = AggregationBuilders.terms("terms").field("age");
    SearchResponse response = client.prepareSearch("lib3").addAggregation(builder).execute().actionGet();
    Terms terms = response.getAggregations().get("terms");
    for(Terms.Bucket term:terms.getBuckets()) {
        System.out.println(term.getKey()+"  "+term.getDocCount());
    }
}

2、terms query聚合查询

//filter聚合
@Test
public void test41() throws UnknownHostException{
    //1、指定es集群  cluster.name 是固定的key值，my-application是ES集群的名称
    Settings settings = Settings.builder().put("cluster.name", "my-application").build();
    //2.创建访问ES服务器的客户端
    TransportClient client = new PreBuiltTransportClient(settings)
            .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.1.94"), 9300));
    //以年龄分组，并查询年龄为20的有多少人
    QueryBuilder queryBuilder = QueryBuilders.termQuery("age", 20);
    AggregationBuilder builder = AggregationBuilders.filter("filter",queryBuilder);
    SearchResponse response = client.prepareSearch("lib3").addAggregation(builder).execute().actionGet();
    Filter filter = response.getAggregations().get("filter");
    System.out.println(filter.getDocCount());
}

3、filters聚合

//filters聚合:指定多个过滤条件
@Test
public void test42() throws UnknownHostException{
    //1、指定es集群  cluster.name 是固定的key值，my-application是ES集群的名称
    Settings settings = Settings.builder().put("cluster.name", "my-application").build();
    //2.创建访问ES服务器的客户端
    TransportClient client = new PreBuiltTransportClient(settings)
            .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.1.94"), 9300));
    //查询heijiu changge中各有多少个文档
    QueryBuilder queryBuilder = QueryBuilders.termQuery("interests", "hejiu");
    QueryBuilder queryBuilder2 = QueryBuilders.termQuery("interests", "changge");

    AggregationBuilder builder = AggregationBuilders.filters("filters",queryBuilder,queryBuilder2);
    SearchResponse response = client.prepareSearch("lib3").addAggregation(builder).execute().actionGet();
    Aggregation filter = response.getAggregations().get("filters");
    System.out.println(filter.toString());
}

4、range聚合

//range聚合:范围分组过滤条件
@Test
public void test43() throws UnknownHostException{
    //1、指定es集群  cluster.name 是固定的key值，my-application是ES集群的名称
    Settings settings = Settings.builder().put("cluster.name", "my-application").build();
    //2.创建访问ES服务器的客户端
    TransportClient client = new PreBuiltTransportClient(settings)
            .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.1.94"), 9300));
    //统计年龄在50以下的，年龄在25至50之间，年龄在25以上的人数
    AggregationBuilder builder = AggregationBuilders
            .range("range")
            .field("age")
            .addUnboundedTo(50)
            .addRange(25,50)
            .addUnboundedFrom(25);
    SearchResponse response = client.prepareSearch("lib3").addAggregation(builder).execute().actionGet();
    Aggregation filter = response.getAggregations().get("range");
    System.out.println(filter.toString());
}

5、missing聚合

//missing聚合:为空聚合统计
@Test
public void test44() throws UnknownHostException{
    //1、指定es集群  cluster.name 是固定的key值，my-application是ES集群的名称
    Settings settings = Settings.builder().put("cluster.name", "my-application").build();
    //2.创建访问ES服务器的客户端
    TransportClient client = new PreBuiltTransportClient(settings)
            .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.1.94"), 9300));
    //统计价格为空的个数
    AggregationBuilder builder = AggregationBuilders.missing("missing").field("price");
    SearchResponse response = client.prepareSearch("lib4").addAggregation(builder).execute().actionGet();
    Aggregation filter = response.getAggregations().get("missing");
    System.out.println(filter.toString());
}

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