ElasticSearch在Java中实现match查询

左手的ㄟ右手 2022-02-16 02:14 507阅读 0赞

# ElasticSearch在Java中实现match查询 #

适用范围ElasticSearch6.x

如果是ElasticSearch7或以上版本情转到如下链接

REST高级客户端-DocumentApi：[https://blog.csdn.net/u014646662/article/details/96473156][https_blog.csdn.net_u014646662_article_details_96473156]

REST高级客户端SearchApi：[https://blog.csdn.net/u014646662/article/details/96853830][https_blog.csdn.net_u014646662_article_details_96853830]

更多新的查询方式（ElasticSearch相关文档）：[https://blog.csdn.net/u014646662/article/category/8747782][https_blog.csdn.net_u014646662_article_category_8747782]

对人工智能感兴趣的同学，可以点击以下链接：

[现在人工智能非常火爆，很多朋友都想学，但是一般的教程都是为博硕生准备的，太难看懂了。最近发现了一个非常适合小白入门的教程，不仅通俗易懂而且还很风趣幽默。所以忍不住分享一下给大家。点这里可以跳转到教程。][Link 1]

[https://www.cbedai.net/u014646662][Link 1]

*  match query知道分词器的存在，会对filed进行分词操作，然后再查询
 *  match\_all:查询所有文档
 *  multi\_match:可以指定多个字段
 *  match\_phrase:短语匹配查询，ElasticSearch引擎首先分析（analyze）查询字符串，从分析后的文本中构建短语查询，这意味着必须匹配短语中的所有分词，并且保证各个分词的相对位置不变

/**
    	 * match查询
    	 */
    	@Test
    	public void match() throws Exception {
    		Settings settings = Settings.builder().put("cluster.name","my-application").build();
    		@SuppressWarnings("resource")
    		TransportClient client = new PreBuiltTransportClient(settings)
    				.addTransportAddress(new TransportAddress(InetAddress.getByName("master"),9300));
    		//last_name字段中是Addison
    		QueryBuilder match = QueryBuilders.matchQuery("last_name", "Addison");
    		//查询所有
    		QueryBuilder matchAll = QueryBuilders.matchAllQuery();
    		//查询first_name或last_name是zhou
    		QueryBuilder multiMatch = QueryBuilders.multiMatchQuery("zhou", "first_name","last_name");
    		//查询about字段包含in this world
    		QueryBuilder matchPhrase = QueryBuilders.matchPhraseQuery("about", "in this world");
    		
    		System.out.println("match查询");
    		matchQuery(match, client);
    		System.out.println("matchAll查询");
    		matchQuery(matchAll, client);
    		System.out.println("multiMatch查询");
    		matchQuery(multiMatch, client);
    		System.out.println("matchPhrase查询");
    		matchQuery(matchPhrase, client);
    		
    	}
    	
    	public void matchQuery(QueryBuilder query,TransportClient client) throws Exception {
    		SearchResponse response = client.prepareSearch("lib").setQuery(query).get();
    		for(SearchHit hit:response.getHits()) {
    			Map<String, Object> map = hit.getSourceAsMap();
    			for(String key:map.keySet()) {
    				System.out.println(key+"="+map.get(key));
    			}
    		}
    	}

[https_blog.csdn.net_u014646662_article_details_96473156]: https://blog.csdn.net/u014646662/article/details/96473156
[https_blog.csdn.net_u014646662_article_details_96853830]: https://blog.csdn.net/u014646662/article/details/96853830
[https_blog.csdn.net_u014646662_article_category_8747782]: https://blog.csdn.net/u014646662/article/category/8747782
[Link 1]: https://www.cbedai.net/u014646662