【例子】Bobobrowse：lucene分组统计扩展组件

Bobo-browse是一个基于lucene的分组统计插件，可以完成对搜索结果的分面统计，比如“男装（221） 女装（332）”等。

这里做首次尝试，只谈使用，不谈原理。用熟了才有可能去研究仔细。

lucene3 + bobo-browse2.5

建索引，更新索引跟它没关系，仅关注搜索。索引建立好后，开始进行分面搜索。

bobo-spring.xml：

<?xml version="1.0" encoding="UTF-8"?>  
  
<beans xmlns="http://www.springframework.org/schema/beans"  
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
    xsi:schemaLocation="http://www.springframework.org/schema/beans   
    http://www.springframework.org/schema/beans/spring-beans.xsd">  
      
    <!--  
        com.browseengine.bobo.facets.impl.SimpleFacetHandler            no-analyzar  
        com.browseengine.bobo.facets.impl.MultiValueFacetHandler        analyzar-enable  
        com.browseengine.bobo.facets.impl.CompactMultiValueFacetHandler analyzar-enable  
        com.browseengine.bobo.facets.impl.PathFacetHandler              no-analyzar  
        com.browseengine.bobo.facets.impl.RangeFacetHandler             no-analyzar  
    -->  
      
    <bean id="brand" class="com.browseengine.bobo.facets.impl.MultiValueFacetHandler">  
        <constructor-arg value="brand" />  
    </bean>  
  
    <bean id="pic_url1" class="com.browseengine.bobo.facets.impl.PathFacetHandler">    
        <constructor-arg value="pic_url1" />    
        <constructor-arg value="true" />    
        <property name="separator" value="/" />    
    </bean>  
      
    <bean id="sold_num" class="com.browseengine.bobo.facets.impl.SimpleFacetHandler">    
        <constructor-arg value="sold_num" />  
    </bean>  
      
    <bean id="price" class="com.browseengine.bobo.facets.impl.RangeFacetHandler">  
        <constructor-arg value="price" />  
        <constructor-arg>    
            <bean class="com.browseengine.bobo.facets.data.PredefinedTermListFactory">    
                <constructor-arg value="java.lang.Double"/>    
                <constructor-arg value="00000000000000000000" />    
            </bean>    
        </constructor-arg>    
        <constructor-arg>    
             <list>    
                <value>[* TO 2]</value>    
                <value>[3 TO 15000]</value>    
                <value>[15001 TO 17500]</value>    
                <value>[17501 TO *]</value>    
             </list>    
        </constructor-arg>  
    </bean>  
      
    <bean id="handlers" class="java.util.ArrayList">  
        <constructor-arg>  
            <list>  
                <ref bean="brand" />  
                <ref bean="pic_url1" />  
                <ref bean="price" />  
                <ref bean="sold_num" />  
            </list>  
        </constructor-arg>  
    </bean>  
</beans>  

代码：

@SuppressWarnings("deprecation")  
    public void testBoboBrowser(){  
        String splittype = "pic_url1";  
        String splittype2 = "price";  
        String splittype3 = "brand";  
        String splittype4 = "sold_num";  
        try {  
            // 1  
            IndexReader indexReader = IndexReader.open(  
                    FSDirectory.open(  
                            new File("D://workspace2//normandy_normandypositionii//NormandyPositionII//luceneIndex//goods//")));  
            BoboIndexReader boboIndexReader = BoboIndexReader.getInstance(indexReader);  
              
            BrowseRequest browseRequest = new BrowseRequest();  
            browseRequest.setCount(10);  
            browseRequest.setOffset(0);  
  
            // 2  
            String indexName = "brand";  
            String keywords = "飞扬";  
            Analyzer analyzer = new IKAnalyzer();  
            QueryParser queryParser = new QueryParser(Version.LUCENE_CURRENT, indexName, analyzer);  
            Query query = queryParser.parse(keywords);  
              
            browseRequest.setQuery(query);  
              
            // 3 设置分面类型  
            FacetSpec facetSpec = new FacetSpec();  
            facetSpec.setMaxCount(10);// 搜索出来的标签数目  
            facetSpec.setOrderBy(FacetSortSpec.OrderHitsDesc);  
              
            browseRequest.setFacetSpec(splittype, facetSpec);  
            browseRequest.setFacetSpec(splittype2, facetSpec);  
            browseRequest.setFacetSpec(splittype3, facetSpec);  
            browseRequest.setFacetSpec(splittype4, facetSpec);  
              
            // 4  
            Browsable browser = new BoboBrowser(boboIndexReader);  
            BrowseResult browseResult = browser.browse(browseRequest);  
              
            // 5  
            int totalHits = browseResult.getNumHits();  
            BrowseHit[] browseHit = browseResult.getHits();  
  
            System.out.println("total count:"+totalHits);  
              
            // 上面添加了哪些分类字段，这里就有哪些分类字段可以被取值  
            for(BrowseHit b : browseHit){  
                System.out.println(b.getField(splittype2));  
            }  
              
            // 搜索出来的标签  
            Map<String,FacetAccessible> facetMap = browseResult.getFacetMap();  
              
            System.out.println("bobo分面："+splittype+"-----------------------");  
            FacetAccessible colorFacets = facetMap.get(splittype);  
            List<BrowseFacet> facetVals = colorFacets.getFacets();  
            for(BrowseFacet f:facetVals){  
                System.out.println(f.getValue() + "(" + f.getHitCount() + ")");  
            }  
              
            System.out.println("bobo分面："+splittype2+"-----------------------");  
            colorFacets = facetMap.get(splittype2);  
            facetVals = colorFacets.getFacets();  
            for(BrowseFacet f:facetVals){  
                System.out.println(f.getValue() + "(" + f.getHitCount() + ")");  
            }  
              
            System.out.println("bobo分面："+splittype3+"-----------------------");  
            colorFacets = facetMap.get(splittype3);  
            facetVals = colorFacets.getFacets();  
            for(BrowseFacet f:facetVals){  
                System.out.println(f.getValue() + "(" + f.getHitCount() + ")");  
            }  
              
            System.out.println("bobo分面："+splittype4+"-----------------------");  
            colorFacets = facetMap.get(splittype4);  
            facetVals = colorFacets.getFacets();  
            for(BrowseFacet f:facetVals){  
                System.out.println(f.getValue() + "(" + f.getHitCount() + ")");  
            }  
        } catch (CorruptIndexException e) {  
            e.printStackTrace();  
        } catch (IOException e) {  
            e.printStackTrace();  
        } catch (ParseException e) {  
            e.printStackTrace();  
        } catch (BrowseException e) {  
            e.printStackTrace();  
        }  
    }  

结果：

total count:2
00000000000000000211
00000000000000001111
bobo分面：pic_url1-----------------------
分类1/(2)
bobo分面：price-----------------------
[3 TO 15000](2)
bobo分面：brand-----------------------
空间(2)
飞扬(2)
bobo分面：sold_num-----------------------
2(1)
3(1)