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
        @Testpublic 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
    @Testpublic 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）
        @Testpublic 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
        @Testpublic 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）
        @Testpublic 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/

技術在于交流！

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