java操作elasticsearch實現前綴查詢、wildcard、fuzzy模糊查詢、ids查詢

1、前綴查詢（prefix）

//prefix前綴查詢
        @Test
        public void test15() throws UnknownHostException {
            //1、指定es集群  cluster.name 是固定的key值，my-application是ES集群的名稱
            Settings settings = Settings.builder().put("cluster.name", "my-application").build();
            //2.創建訪問ES服務器的客戶端
            TransportClient client = new PreBuiltTransportClient(settings)
                    //獲取es主機中節點的ip地址及端口號(以下是單個節點案例)
                                    .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.1.94"), 9300));
            //prefixQuery 第一個參數為字段名，后面是以zhao開頭的條件進行查詢
            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());
                //將獲取的值轉換成map的形式
                Map<String, Object> map = hit.getSourceAsMap();
                for(String key:map.keySet()) {
                    System.out.println(key +" key對應的值為：" +map.get(key));
                }
            }
        }

2、wildcard模糊查詢

//wildcard模糊查詢
    @Test
    public void test16() throws UnknownHostException {
        //1、指定es集群  cluster.name 是固定的key值，my-application是ES集群的名稱
        Settings settings = Settings.builder().put("cluster.name", "my-application").build();
        //2.創建訪問ES服務器的客戶端
        TransportClient client = new PreBuiltTransportClient(settings)
        //獲取es主機中節點的ip地址及端口號(以下是單個節點案例)
                        .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.1.94"), 9300));
        //wildcardQuery模糊查詢
        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());
        //將獲取的值轉換成map的形式
        Map<String, Object> map = hit.getSourceAsMap();
        for(String key:map.keySet()) {
            System.out.println(key +" key對應的值為：" +map.get(key));
        }
    }
}        

3、fuzzy模糊查詢

　　說明：fuzzy才是實現真正的模糊查詢，我們輸入的字符可以是個大概，他可以根據我們輸入的文字大概進行匹配查詢，具體可看文章中的解釋和代碼，注意與wildcard模糊查詢的區別

//fuzzy模糊查詢(輸入的值輸入個大概也可以查詢出來）
        @Test
        public void test17() throws UnknownHostException {
            //1、指定es集群  cluster.name 是固定的key值，my-application是ES集群的名稱
            Settings settings = Settings.builder().put("cluster.name", "my-application").build();
            //2.創建訪問ES服務器的客戶端
            TransportClient client = new PreBuiltTransportClient(settings)
            //獲取es主機中節點的ip地址及端口號(以下是單個節點案例)
                            .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.1.94"), 9300));
            //fuzzyQuery模糊查詢
            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());
            //將獲取的值轉換成map的形式
            Map<String, Object> map = hit.getSourceAsMap();
            for(String key:map.keySet()) {
                System.out.println(key +" key對應的值為：" +map.get(key));
            }
        }
    }            
    
        //typeQuery類型查詢
        @Test
        public void test18() throws UnknownHostException {
            //1、指定es集群  cluster.name 是固定的key值，my-application是ES集群的名稱
            Settings settings = Settings.builder().put("cluster.name", "my-application").build();
            //2.創建訪問ES服務器的客戶端
            TransportClient client = new PreBuiltTransportClient(settings)
            //獲取es主機中節點的ip地址及端口號(以下是單個節點案例)
                            .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.1.94"), 9300));
            //typeQuery類型查詢
            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());
            //將獲取的值轉換成map的形式
            Map<String, Object> map = hit.getSourceAsMap();
            for(String key:map.keySet()) {
                System.out.println(key +" key對應的值為：" +map.get(key));
            }
        }
    }        

4、ids查詢

　　說明：根據多個id值進行查詢

//idsQuery id查詢（可以同時根據多個id進行查詢）
        @Test
        public void test19() throws UnknownHostException {
            //1、指定es集群  cluster.name 是固定的key值，my-application是ES集群的名稱
            Settings settings = Settings.builder().put("cluster.name", "my-application").build();
            //2.創建訪問ES服務器的客戶端
            TransportClient client = new PreBuiltTransportClient(settings)
            //獲取es主機中節點的ip地址及端口號(以下是單個節點案例)
                            .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.1.94"), 9300));
            //idsQuery id查詢
            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());
            //將獲取的值轉換成map的形式
            Map<String, Object> map = hit.getSourceAsMap();
            for(String key:map.keySet()) {
                System.out.println(key +" key對應的值為：" +map.get(key));
            }
        }
    }    

下一篇博客本人將書寫java操作elasticsearch實現聚合查詢。對后期博客感興趣的朋友可以關注交流，轉發請說明出處，本人的博客地址為：https://www.cnblogs.com/chenyuanbo/

技術在於交流！