ElasticSearch学习（十一）在Java应用中实现聚合查询、query string查询

最新推荐文章于 2025-03-21 11:53:23 发布

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最新推荐文章于 2025-03-21 11:53:23 发布

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分类专栏： ElasticSearch

本文链接：https://blog.youkuaiyun.com/qq_41851454/article/details/81391905

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    //聚合查询
    @Test
    public void test20() throws Exception {
        //指定ES集群
        Settings settings = Settings.builder().put("cluster.name", "my-application").build();

        //创建访问ES服务器的客户端
        TransportClient client = new PreBuiltTransportClient(settings)
                .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.123.101"),9300));

        //求最大值
        MaxAggregationBuilder builder = AggregationBuilders.max("aggMax").field("age");

        SearchResponse response = client.prepareSearch("lib3").addAggregation(builder).get();

        Max max = response.getAggregations().get("aggMax");
        double value = max.getValue();
        System.out.println(value);
    }

    //聚合查询
    @Test
    public void test21() throws Exception {
        //指定ES集群
        Settings settings = Settings.builder().put("cluster.name", "my-application").build();

        //创建访问ES服务器的客户端
        TransportClient client = new PreBuiltTransportClient(settings)
                .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.123.101"),9300));

        //求最小值
        AggregationBuilder builder = AggregationBuilders.min("aggMin").field("age"