ElasticSearch2.3.4之Java Api调用例子

朴灿烈づ我的快乐病毒、 2022-04-11 06:48 173阅读 0赞

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package com.curd.es;
    
    import org.elasticsearch.action.search.SearchRequestBuilder;
    import org.elasticsearch.action.search.SearchResponse;
    import org.elasticsearch.client.Client;
    import org.elasticsearch.client.transport.TransportClient;
    import org.elasticsearch.common.settings.Settings;
    import org.elasticsearch.common.transport.InetSocketTransportAddress;
    import org.elasticsearch.index.query.BoolQueryBuilder;
    import org.elasticsearch.index.query.QueryBuilders;
    import org.elasticsearch.index.query.QueryStringQueryBuilder.Operator;
    import org.elasticsearch.search.SearchHit;
    import org.elasticsearch.search.aggregations.AggregationBuilders;
    import org.elasticsearch.search.aggregations.Aggregations;
    import org.elasticsearch.search.aggregations.bucket.histogram.DateHistogramBuilder;
    import org.elasticsearch.search.aggregations.bucket.histogram.DateHistogramInterval;
    import org.elasticsearch.search.aggregations.bucket.histogram.Histogram;
    import org.elasticsearch.search.aggregations.bucket.terms.StringTerms;
    import org.elasticsearch.search.aggregations.bucket.terms.Terms;
    import org.elasticsearch.search.aggregations.bucket.terms.TermsBuilder;
    import org.joda.time.DateTime;
    
    import java.net.InetSocketAddress;
    import java.util.List;
    import java.util.Map;
    
    public class ElasticSearchToolsTest {
       
    
    
    	//elasticsearch2.3的客户端实例
    	static Client client=null;
    	static {
       
    		//设置集群名字
    		Settings settings = Settings.settingsBuilder()
    		        .put("cluster.name", "search")
    		        .put("client.transport.sniff", true)
    		       . build();
    		try {
       
    			//初始化连接客户端
    			client = new TransportClient.Builder().settings(settings).build()
    					.addTransportAddress(new InetSocketTransportAddress(new InetSocketAddress("192.168.201.5",9300)))
    					.addTransportAddress(new InetSocketTransportAddress(new InetSocketAddress("192.168.201.6",9300)))
    					.addTransportAddress(new InetSocketTransportAddress(new InetSocketAddress("192.168.201.7",9300)));
    		}catch (Exception e){
       
    			e.printStackTrace();
    		}
    
    	}
    
    
    	/****
    	 * 测试读取仅仅索引没有存储的字段，从倒排里面加载数据
    	 * 过滤数据
    	 */
    	public static void filterQueryString(){
       
    		//构建查询请求
    		SearchRequestBuilder search=client.prepareSearch("monitor").setTypes("monitor");
    		BoolQueryBuilder boolQuery = QueryBuilders.boolQuery()
    				.must(QueryBuilders.queryStringQuery("*:*"))
    				.filter(QueryBuilders.queryStringQuery("+mtitle:北京奇虎科技     +dtime:[1443196800000 TO 1451059200000] ").defaultOperator(Operator.AND));
    				search.setQuery(boolQuery);
    		search.addFieldDataField("t1");//索引，没有存储的域，从field data里面加载数据
    		search.addFieldDataField("t2");//索引，没有存储的域，从field data里面加载数据
    		search.addFieldDataField("t3");//索引，没有存储的域，从field data里面加载数据
    		search.addFieldDataField("dtime");//索引，没有存储的域，从field data里面加载数据
    		SearchResponse r = search.get();
    		for(SearchHit hit:r.getHits()){
       
    			String id=hit.getId();
    			String index=hit.getIndex();
    			String type=hit.getType();
    			String t1=hit.getFields().get("t1").getValue();
    			String t2=hit.getFields().get("t2").getValue();
    			String t3=hit.getFields().get("t3").getValue();
    			Long time=hit.getFields().get("dtime").getValue();
    			Float score=hit.getScore();
    			System.out.println(id+"\t"+t1+"\t"+t2+"\t"+t3+"\t"+time+"\t"+score);
    		}
    		System.out.println("总数量："+r.getHits().getTotalHits());
    		System.out.println("耗时："+r.getTookInMillis());
    	}
    
    
    	public static void main(String[] args) throws Exception {
       
    
    		//单个聚合字段，支持.写法
    		String aggField="data.subjectId";
    //		testOneAggString(aggField);
    		testFilter();
    		client.close();
    
    	}
    
    	/***
    	 *  获取search请求的结果，并输出打印结果信息
    	 * @param search
    	 * @throws Exception
         */
    	public  static void showResult(SearchRequestBuilder search) throws Exception{
       
    		SearchResponse r = search.get();//得到查询结果
    		for(SearchHit hits:r.getHits()){
       
    			//只能获取addFields里面添加的字段
    //			System.out.println(hits.getFields().get("userId").getValue());
    			//默认可会source里面获取所需字段
    			System.out.println(hits.getSource().get("actId"));
    			//注意不支持data.subjectName这样的访问方式
    			//System.out.println(hits.getId()+"  "+hits.score()+"  "+data.get("subjectName"));
    			//如果是个嵌套json，需要转成map后，访问其属性
    //			Map data=(Map) hits.getSource().get("data");
    //			System.out.println(hits.getId()+"  "+hits.score()+"  "+data.get("subjectName"));
    
    
    		}
    		long hits=r.getHits().getTotalHits();//读取命中数量
    		System.out.println(hits);
    	}
    
    
    	/***
    	 * 每一天的select count(distinct(actid)) from talbe group by date
         */
    	public static void countDistinctByField(){
       
    
    
    		//构造search请求
    		SearchRequestBuilder search=client.prepareSearch("userlog*").setTypes("logs");
    		search.setQuery(QueryBuilders.queryStringQuery("@timestamp:[ "+new DateTime(2016, 8, 8, 0, 0, 0).getMillis()
    				+" TO "+new DateTime(2016, 8, 15, 0, 0, 0).getMillis()+"}"
    		));
    		search.setSize(0);
    		//一级分组字段
    		DateHistogramBuilder dateagg = AggregationBuilders.dateHistogram("dateagg");
    		dateagg.field("@timestamp");//聚合时间字段
    //		dateagg.interval(DateHistogramInterval.HOUR);//按小时聚合
    		dateagg.interval(DateHistogramInterval.DAY);//按天聚合
    //		dateagg.format("yyyy-MM-dd HH"); //格式化时间
    		dateagg.format("yyyy-MM-dd"); //格式化时间
    		dateagg.timeZone("Asia/Shanghai");//设置时区，注意如果程序部署在其他国家使用时，使用Joda-Time来动态获取时区 new DateTime().getZone()
    
    		//二级分组字段
    //		TermsBuilder twoAgg = AggregationBuilders.terms("stragg").field("actId");
    		MetricsAggregationBuilder twoAgg = AggregationBuilders.cardinality("stragg").field("actId");
    
    		//组装聚合字段
    		dateagg.subAggregation(twoAgg);
    		//向search请求添加
    		search.addAggregation(dateagg);
    		//获取结果
    		SearchResponse r = search.get();
    		Histogram h = r.getAggregations().get("dateagg");
    		//得到一级聚合结果里面的分桶集合
    		List<Histogram.Bucket> buckets = (List<Histogram.Bucket>) h.getBuckets();
    		//遍历分桶集
    		for(Histogram.Bucket b:buckets){
       
    			//读取二级聚合数据集引用
    			Aggregations sub = b.getAggregations();
    			//获取二级聚合集合
    			Cardinality agg = sub.get("stragg");
    			//获取去重后的值
    			long value = agg.getValue();
    			//如果设置日期的format的时候，需要使用keyAsString取出，否则获取的是UTC的标准时间
    			System.out.println(b.getKeyAsString() +"  " +b.getDocCount()+" "+value);
    		}
    	}
    
    
    	/***
    	 * 最新版elasticsearch2.3的query测试，结果会评分
    	 * @throws Exception
         */
    	public static void testQuery() throws Exception{
       
    		SearchRequestBuilder search=client.prepareSearch("userlog*").setTypes("logs");
    		String subjectName="语文";
    		//注意查询的时候，支持嵌套的json查询，通过点符号访问下层字段，读取结果时不支持这种方式
     		search.setQuery(QueryBuilders.queryStringQuery("+data.subjectName:* -data.subjectName:"+subjectName+"  "));
    		showResult(search);
    	}
    
    	/***
    	 * 最新版的elasticsearch2.3的filterquery测试，结果不会评分
    	 * @throws Exception
         */
    	public static void testFilter() throws Exception{
       
    		SearchRequestBuilder search=client.prepareSearch("userlog*").setTypes("logs");
    		//第一个参数包含的字段数组，第二个字段排除的字段数组
    //		search.setFetchSource(new String[]{"userId","actId"},null);
    //		search.addFields("actId","userId"); //另一种写法
    		String schoolName="沙河市第三小学";
    		BoolQueryBuilder boolQuery = QueryBuilders.boolQuery()
    				.must(QueryBuilders.queryStringQuery("*:*"))
    				.filter(QueryBuilders.queryStringQuery("+data.subjectName:* +schoolName:"+schoolName).defaultOperator(Operator.AND));
    		//设置query
    		search.setQuery(boolQuery);
    		//打印结果数据
    		showResult(search);
    	}
    
    	/***
    	 *  两个字段分组测试，在时间的维度上加上任意其他的字段聚合，类似group by field1,field2
    	 * @throws Exception
         */
    	public static void testTwoAggString() throws Exception{
       
    		//构造search请求
    		SearchRequestBuilder search=client.prepareSearch("userlog*").setTypes("logs");
    		search.setQuery(QueryBuilders.queryStringQuery("@timestamp:[ "+new DateTime(2016, 8, 10, 0, 0, 0).getMillis()
    		+" TO "+new DateTime(2016, 8, 11, 0, 0, 0).getMillis()+"}"
    		));
    		//一级分组字段
    		DateHistogramBuilder dateagg = AggregationBuilders.dateHistogram("dateagg");
    		dateagg.field("@timestamp");//聚合时间字段
    		dateagg.interval(DateHistogramInterval.HOUR);//按小时聚合
    		dateagg.format("yyyy-MM-dd HH"); //格式化时间
    		dateagg.timeZone("Asia/Shanghai");//设置时区，注意如果程序部署在其他国家使用时，使用Joda-Time来动态获取时区 new DateTime().getZone()
    
    		//二级分组字段
    		TermsBuilder twoAgg = AggregationBuilders.terms("stragg").field("module");
    		//组装聚合字段
    		dateagg.subAggregation(twoAgg);
    		//向search请求添加
    		search.addAggregation(dateagg);
    		//获取结果
    		SearchResponse r = search.get();
    		Histogram h = r.getAggregations().get("dateagg");
    		//得到一级聚合结果里面的分桶集合
    		List<Histogram.Bucket> buckets = (List<Histogram.Bucket>) h.getBuckets();
    		//遍历分桶集
    		for(Histogram.Bucket b:buckets){
       
    			//读取二级聚合数据集引用
    			Aggregations sub = b.getAggregations();
    			//获取二级聚合集合
    			StringTerms count = sub.get("stragg");
    			//如果设置日期的format的时候，需要使用keyAsString取出，否则获取的是UTC的标准时间
    			System.out.println(b.getKeyAsString() +"  " +b.getDocCount());
    			System.out.println("=============================================");
    			for(Terms.Bucket bket:(List<Terms.Bucket>)count.getBuckets()){
       
    
    				System.out.println(bket.getKeyAsString() +"  "+bket.getDocCount());
    			}
    			System.out.println("************************************************");
    
    		}
    
    	}
    
    
    	/***
    	 *  一个字段聚合，类似数据库的group by field1
    	 * @param field 测试聚合的字段
    	 * @throws Exception
         */
    	public static  void testOneAggString(String field)throws Exception{
       
    		//构造search请求
    		SearchRequestBuilder search=client.prepareSearch("userlog*").setTypes("logs");
    		//查询昨天的数据
    		search.setQuery(QueryBuilders.queryStringQuery("@timestamp:[ "+new DateTime(2016, 8, 10, 0, 0, 0).getMillis()
    				+" TO "+new DateTime(2016, 8, 11, 0, 0, 0).getMillis()+"}"
    		));
    		//聚合构造
    		TermsBuilder termsBuilder = AggregationBuilders.terms("agg").field(field);
    		//添加到search请求
    		search.addAggregation(termsBuilder);
    		//获取结果
    		SearchResponse searchResponse = search.get();
    		//获取agg标识下面的结果
    		Terms agg1 = searchResponse.getAggregations().get("agg");
    		//获取bucket
    		List<Terms.Bucket> buckets = (List<Terms.Bucket>) agg1.getBuckets();
    		long sum=0;
    		for(Terms.Bucket b:buckets){
       
    			Aggregations sub = b.getAggregations();
    			System.out.println(b.getKeyAsString()+"  "+b.getDocCount());
    			sum+=b.getDocCount();
    		}
    		System.out.println("总数："+sum);
    	}
    
    }

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