Elasticsearch Java REST高级客户端 bool查询

àì夳堔傛蜴生んèń 2021-11-27 06:44 434阅读 0赞

# Elasticsearch Java REST高级客户端 bool查询 #

版本：Elasticsearch 7.2.0

maven配置见：[Elasticsearch Java REST高级客户端-DocumentApi][Elasticsearch Java REST_-DocumentApi]

1.search bool 查询

2.SearchScroll bool 查询

3.创建客户端

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

## 1.search bool 查询 ##

/**
    	 * boolmatch查询
    	 */
    	public static void boolQuery() {
    		RestHighLevelClient client = getClient();
    
    		// 这里可以不指定索引，也可以指定多个
    		SearchRequest searchRequest = new SearchRequest("tomcat*");
    		SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
    		searchRequest.source(searchSourceBuilder);
    		 QueryBuilder queryBuilder = QueryBuilders.boolQuery()
    	                .must(QueryBuilders.matchQuery("geoip.country_name", "China"))
    	                .must(QueryBuilders.matchQuery("geoip.region_name", "Zhejiang"))
    	                .must(QueryBuilders.matchQuery("verb", "POST"))
    	                .mustNot(QueryBuilders.termQuery("message", "sessionID"))
    	                .should(QueryBuilders.rangeQuery("timestamp").gte("2019-07-23").lte("2019-08-23"))
    	                .filter(QueryBuilders.rangeQuery("bytes").gte(1000).lte(10000));
    
    		searchSourceBuilder.query(queryBuilder);
    		searchSourceBuilder.from(0);
    		searchSourceBuilder.size(32);
    		// 按评分排序
    		searchSourceBuilder.sort("_score");
    		SearchResponse search = null;
    		try {
    			search = client.search(searchRequest, RequestOptions.DEFAULT);
    			search.getHits().forEach(System.out::println);
    		} catch (IOException e) {
    			e.printStackTrace();
    		} finally {
    			close(client);
    		}
    	}

## 2.SearchScroll bool 查询 ##

/**
     * bool查询
     */
    	public static void searchScrollBool() {
    		RestHighLevelClient client = getClient();
    		final Scroll scroll = new Scroll(TimeValue.timeValueMinutes(1L));
    		SearchRequest searchRequest = new SearchRequest("bi-tomcat-*");
    		searchRequest.scroll(scroll);
    		SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
    		 QueryBuilder queryBuilder = QueryBuilders.boolQuery()
    	                .must(QueryBuilders.matchQuery("geoip.country_name", "China"))
    	                .must(QueryBuilders.matchQuery("geoip.region_name", "Zhejiang"))
    	                .must(QueryBuilders.matchQuery("verb", "POST"))
    	                .mustNot(QueryBuilders.termQuery("message", "sessionID"))
    	                .should(QueryBuilders.rangeQuery("timestamp").gte("2019-07-23").lte("2019-08-23"))
    	                .filter(QueryBuilders.rangeQuery("bytes").gte(1000).lte(10000));
    
    		searchSourceBuilder.query(queryBuilder);
    		searchRequest.source(searchSourceBuilder);
    
    		SearchResponse searchResponse = null;
    		try {
    			searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
    		} catch (IOException e) {
    			// TODO 自动生成的 catch 块
    			e.printStackTrace();
    		}
    		String scrollId = searchResponse.getScrollId();
    		SearchHit[] searchHits = searchResponse.getHits().getHits();
    		var page = 1;
    		while (searchHits != null && searchHits.length > 0) {
    
    			SearchScrollRequest scrollRequest = new SearchScrollRequest(scrollId);
    			scrollRequest.scroll(scroll);
    			try {
    				searchResponse = client.scroll(scrollRequest, RequestOptions.DEFAULT);
    			} catch (IOException e) {
    				e.printStackTrace();
    			}
    			scrollId = searchResponse.getScrollId();
    			searchHits = searchResponse.getHits().getHits();
    			if (searchHits != null && searchHits.length > 0) {
    				page++;
    				System.out.println("第"+page+"页");
    				Arrays.asList(searchHits).stream().map(h -> h.getSourceAsString()).forEach(System.out::println);
    			}
    		}
    
    		ClearScrollRequest clearScrollRequest = new ClearScrollRequest();
    		clearScrollRequest.addScrollId(scrollId);
    		ClearScrollResponse clearScrollResponse;
    		try {
    			clearScrollResponse = client.clearScroll(clearScrollRequest, RequestOptions.DEFAULT);
    			boolean succeeded = clearScrollResponse.isSucceeded();
    			System.out.println("清除滚屏是否成功:" + succeeded);
    		} catch (IOException e) {
    			// TODO 自动生成的 catch 块
    			e.printStackTrace();
    		}
    		
    		close(client);
    	}

3.创建客户端

/**
    	 * 
    	 * 关闭客户端
    	 * 
    	 * @param client
    	 */
    	private static void close(RestHighLevelClient client) {
    		try {
    			client.close();
    		} catch (IOException e) {
    			e.printStackTrace();
    		}
    	}
    
    	/**
    	 * 获取客户端
    	 * 
    	 * @return
    	 */
    	private static RestHighLevelClient getClient() {
    		RestHighLevelClient client = new RestHighLevelClient(
    				RestClient.builder(new HttpHost("elk-node01", 9200, "http"), new HttpHost("elk-node02", 9200, "http"),
    						new HttpHost("elk-node03", 9200, "http")));
    		return client;
    	}

[Elasticsearch Java REST_-DocumentApi]: https://blog.csdn.net/u014646662/article/details/96473156
[Link 1]: https://www.cbedai.net/u014646662