java操作elasticsearch实现前缀查询、wildcard、fuzzy模糊查询、ids查询-白红宇

java操作elasticsearch实现前缀查询、wildcard、fuzzy模糊查询、ids查询

阅读量：6717 次

发布时间：2019-06-25

本文共 5739 字，大约阅读时间需要 19 分钟。

1、前缀查询（prefix）

//prefix前缀查询        @Test        public void test15() 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)                    //获取es主机中节点的ip地址及端口号(以下是单个节点案例)                                    .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.1.94"), 9300));            //prefixQuery 第一个参数为字段名，后面是以zhao开头的条件进行查询            QueryBuilder builder = QueryBuilders.prefixQuery("name", "zhao");            SearchResponse response = client.prepareSearch("lib3").setQuery(builder).get();            SearchHits hits = response.getHits();            for(SearchHit hit:hits) {                System.out.println(hit.getSourceAsString());                //将获取的值转换成map的形式                Map
     
       map = hit.getSourceAsMap();                for(String key:map.keySet()) {                    System.out.println(key +" key对应的值为：" +map.get(key));                }            }        }

2、wildcard模糊查询

//wildcard模糊查询    @Test    public void test16() 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)        //获取es主机中节点的ip地址及端口号(以下是单个节点案例)                        .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.1.94"), 9300));        //wildcardQuery模糊查询        QueryBuilder builder = QueryBuilders.wildcardQuery("name", "zhao*");        SearchResponse response = client.prepareSearch("lib3").setQuery(builder).get();        SearchHits hits = response.getHits();        for(SearchHit hit:hits) {        System.out.println(hit.getSourceAsString());        //将获取的值转换成map的形式        Map
     
       map = hit.getSourceAsMap();        for(String key:map.keySet()) {            System.out.println(key +" key对应的值为：" +map.get(key));        }    }}

3、fuzzy模糊查询

　　说明：fuzzy才是实现真正的模糊查询，我们输入的字符可以是个大概，他可以根据我们输入的文字大概进行匹配查询，具体可看文章中的解释和代码，注意与wildcard模糊查询的区别

//fuzzy模糊查询(输入的值输入个大概也可以查询出来）        @Test        public void test17() 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)            //获取es主机中节点的ip地址及端口号(以下是单个节点案例)                            .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.1.94"), 9300));            //fuzzyQuery模糊查询            QueryBuilder builder = QueryBuilders.fuzzyQuery("name", "chagge");            SearchResponse response = client.prepareSearch("lib3").setQuery(builder).get();            SearchHits hits = response.getHits();            for(SearchHit hit:hits) {            System.out.println(hit.getSourceAsString());            //将获取的值转换成map的形式            Map
     
       map = hit.getSourceAsMap();            for(String key:map.keySet()) {                System.out.println(key +" key对应的值为：" +map.get(key));            }        }    }                        //typeQuery类型查询        @Test        public void test18() 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)            //获取es主机中节点的ip地址及端口号(以下是单个节点案例)                            .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.1.94"), 9300));            //typeQuery类型查询            QueryBuilder builder = QueryBuilders.typeQuery("blog");            SearchResponse response = client.prepareSearch("index1").setQuery(builder).get();            SearchHits hits = response.getHits();            for(SearchHit hit:hits) {            System.out.println(hit.getSourceAsString());            //将获取的值转换成map的形式            Map
      
        map = hit.getSourceAsMap();            for(String key:map.keySet()) {                System.out.println(key +" key对应的值为：" +map.get(key));            }        }    }

4、ids查询

　　说明：根据多个id值进行查询

//idsQuery id查询（可以同时根据多个id进行查询）        @Test        public void test19() 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)            //获取es主机中节点的ip地址及端口号(以下是单个节点案例)                            .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.1.94"), 9300));            //idsQuery id查询            QueryBuilder builder = QueryBuilders.idsQuery("1","2");            SearchResponse response = client.prepareSearch("lib3").setQuery(builder).get();            SearchHits hits = response.getHits();            for(SearchHit hit:hits) {            System.out.println(hit.getSourceAsString());            //将获取的值转换成map的形式            Map
     
       map = hit.getSourceAsMap();            for(String key:map.keySet()) {                System.out.println(key +" key对应的值为：" +map.get(key));            }        }    }

下一篇博客本人将书写java操作elasticsearch实现聚合查询。对后期博客感兴趣的朋友可以关注交流，转发请说明出处，本人的博客地址为：https://www.cnblogs.com/chenyuanbo/

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转载于:https://www.cnblogs.com/chenyuanbo/p/10296845.html

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