参考官网：https://lucene.apache.org/solr/guide/6_6/result-clustering.html
最近用到solr自聚类的，先简单介绍如下：
1、配置文件
主要配置文件必须配置如下内容：
<lib dir="${solr.install.dir:../../..}/contrib/clustering/lib/" regex=".*\.jar" /> <lib dir="${solr.install.dir:../../..}/dist/" regex="solr-clustering-\d.*\.jar" />
<searchComponent name="clustering" enable="${solr.clustering.enabled:true}" class="solr.clustering.ClusteringComponent"><!-- Lingo clustering algorithm --><lst name="engine"><str name="name">lingo</str><!--<bool name="optional">true</bool>--><str name="carrot.algorithm">org.carrot2.clustering.lingo.LingoClusteringAlgorithm</str><str name="carrot.resourcesDir">clustering/carrot2</str></lst><!-- An example definition for the STC clustering algorithm. --><lst name="engine"><str name="name">stc</str><bool name="optional">true</bool><str name="carrot.algorithm">org.carrot2.clustering.stc.STCClusteringAlgorithm</str><str name="carrot.resourcesDir">clustering/carrot2</str></lst><lst name="engine"><str name="name">kmeans</str><!--<bool name="optional">true</bool>--><str name="carrot.algorithm">org.carrot2.clustering.kmeans.BisectingKMeansClusteringAlgorithm</str><str name="carrot.resourcesDir">clustering/carrot2</str></lst></searchComponent>
下面的配置文件根据自己的实际情况进行修改：
<requestHandler name="/clustering"startup="lazy"class="solr.SearchHandler"><lst name="defaults"><bool name="clustering">true</bool><bool name="clustering.results">true</bool><!-- Field name with the logical "title" of a each document (optional) --><str name="carrot.title">keyword</str><!-- Logical field to physical field mapping. --><str name="carrot.url">id</str><!-- Field name with the logical "content" of a each document (optional) --><str name="carrot.snippet">summary</str><!-- Apply highlighter to the title/ content and use this for clustering. --><bool name="carrot.produceSummary">true</bool><!-- the maximum number of labels per cluster --><!--<int name="carrot.numDescriptions">5</int>--><!-- produce sub clusters --><bool name="carrot.outputSubClusters">false</bool><!-- Configure any other request handler parameters. We will cluster thetop 100 search results so bump up the 'rows' parameter. --><!--<str name="defType">edismax</str><str name="qf">text^0.5 features^1.0 name^1.2 sku^1.5 id^10.0 manu^1.1 cat^1.4</str><str name="q.alt">*:*</str>--><str name="defType">edismax</str><!--<str name="qf">summary^0.5 category^1.2 id^10.0</str>--><str name="qf">keyword^0.5 title^1.2 id^10.0</str><str name="rows">100</str><str name="fl">*,score</str></lst><!-- Append clustering at the end of the list of search components. --><arr name="last-components"><str>clustering</str></arr></requestHandler>
managed-schema配置文件包含以下内：
<fieldType name="text_ik" class="solr.TextField"><analyzer type="index" class="org.wltea.analyzer.lucene.IKAnalyzer"/><analyzer type="query" class="org.wltea.analyzer.lucene.IKAnalyzer"/></fieldType><field name="id" type="string" multiValued="false" indexed="true" required="true" stored="true"/><field name="text" type="text_ik" multiValued="false" indexed="true" stored="true" termVectors ="true"/><field name="title" type="text_ik" multiValued="false" indexed="true" stored="true" /><field name="snippet" type="text_ik" multiValued="false" indexed="true" stored="true" /><field name="keyword" type="text_ik" multiValued="false" indexed="true" stored="true" /><field name="category" type="text_ik" multiValued="false" indexed="true" stored="true" /><field name="summary" type="text_ik" multiValued="false" indexed="true" stored="true"/><field name="path" type="string" multiValued="false" indexed="true" stored="true"/>
注意：text_ik对应的分词组件，要引用对应的jar包，具体参见：http://www.cnblogs.com/shaosks/p/8204615.html
2、测试索引的文件
启动solr服务，在浏览器输入：http://localhost:8983/solr/mycore/clustering?q=*:*&rows=10
结果如下：
3、java查询代码
import org.apache.solr.client.solrj.SolrClient; import org.apache.solr.client.solrj.SolrQuery; import org.apache.solr.client.solrj.SolrServerException; import org.apache.solr.client.solrj.impl.HttpSolrClient; import org.apache.solr.client.solrj.response.Cluster; import org.apache.solr.client.solrj.response.QueryResponse; import org.apache.solr.client.solrj.response.ClusteringResponse; import org.apache.solr.common.SolrDocument;import java.io.IOException; import java.util.List;/*** @Author：sks* @Description：* @Date：Created in 9:41 2018/1/18* @Modified by：**/ public class AutoCluster {private static SolrClient solr;/*** @Author：sks* @Description：初始化solr客户端* @Date：*/public static void Init(String urlString){solr = new HttpSolrClient.Builder(urlString).build();}public static void main(String[] args) throws SolrServerException,IOException {String urlString = "http://localhost:8983/solr/mycore";String path = "D:/work/Solr/ImportData";Init(urlString);getAutoClusterInfo();System.exit(0);}/*** @Author：sks* @Description：获取聚类数据* @Date：*/private static void getAutoClusterInfo() throws SolrServerException,IOException {//使用这个对象做查询SolrQuery params = new SolrQuery();//查询所有数据params.set("qt", "/clustering");params.setQuery("*:*");params.setStart(0);params.setRows(30);QueryResponse queryResponse = solr.query(params);ClusteringResponse clr = queryResponse.getClusteringResponse();List<Cluster> list = clr.getClusters();//拿到聚类数据集合,返回查询结果String txt = "";for(Cluster c :list){//类别标签List<String> lblist = c.getLabels();for(String lb:lblist){System.out.println(lb);}//聚类文档IDList<String> doclist = c.getDocs();for(String doc:doclist){System.out.println(" " + doc);}}}}
查询结果如下：
