Solr学习笔记之5、Component（组件）与Handler（处理器）学习

一、搜索篇

拼写检查（spellCheck）

作用：用来检查用户输入的检索内容是否存在，如果不存在则给它提示出相近或相似的内容

配置：在solrconfig.xml中配置如下

  1. <searchComponent name="spellcheck" class="solr.SpellCheckComponent">
  2.  <lst name="spellchecker">
  3.    <str name="name">default</str>
  4.    <!--这里指明需要根据哪个字段的索引为依据进行拼写检查。现配置名为 Title 的字段-->
  5.    <str name="field">Title</str>
  6.    <!--拼写检查索引的目录-->
  7.    <str name="spellcheckIndexDir">spellchecker</str>
  8.    <!--当commit的时候，对拼写检查索引进行构建。(只有构建后，拼写检查才有效果)-->
  9.    <!--当然，也可以选择在optimize的时候，进行构建。那么只需要将"buildOnCommint"换为 "buildOnOptimize"-->
  10.     <str name="buildOnCommit">true</str>
  11.   </lst>
  12. </searchComponent> 
  13.  
  14. <requestHandler name="/spell" class="solr.SearchHandler" startup="lazy">
  15.   <!--默认参数-->
  16.   <lst name="defaults">
  17.     <str name="spellcheck.onlyMorePopular">false</str>
  18.     <str name="spellcheck.extendedResults">false</str>
  19.     <!--配置拼写检查提示结果的个数(可以根据需要适当加大)-->
  20.     <str name="spellcheck.count">1</str>
  21.   </lst>
  22.   <arr name="last-components">
  23.     <str>spellcheck</str>
  24.   </arr>
  25. </requestHandler>

举例：

http://localhost:8080/solr/collection1/spell?q=Title:tests&spellcheck=true

请求结果如下图：

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <response>
  3.   <lst name="responseHeader">
  4.     <int name="status">0</int>
  5.     <int name="QTime">119</int>
  6.   </lst>
  7.   <result name="response" start="0" numFound="0"/>
  8.   <lst name="spellcheck">
  9.     <lst name="suggestions">
  10.       <lst name="tests">
  11.         <int name="numFound">1</int>
  12.         <int name="startOffset">6</int>
  13.         <int name="endOffset">11</int>
  14.         <int name="origFreq">0</int>
  15.         <arr name="suggestion">
  16.           <lst>
  17.             <str name="word">test</str>
  18.             <int name="freq">6</int>
  19.           </lst>
  20.         </arr>
  21.       </lst>
  22.       <bool name="correctlySpelled">false</bool>
  23.       <lst name="collation">
  24.         <str name="collationQuery">Title:test</str>
  25.         <int name="hits">6</int>
  26.         <lst name="misspellingsAndCorrections">
  27.           <str name="tests">test</str>
  28.         </lst>
  29.       </lst>
  30.     </lst>
  31.   </lst>
  32. </response>

检索建议（suggest）

作用：检索建议则是用户输入某个检索条件后，会立刻友好的给出一系列提示内容，并推荐首个出现的相似的词，作为推荐词。如果这个条件想关的东西一个都没有，则不会提示，所以某种意义上来说，可以在用户输入检索条件时使用suggest，而在点击完搜索时，使用拼写检查，二者结合给可以用户带来比较好的用户体验。

配置：在solrconfig.xml中配置如下

  1.   <!--搜索建议-->
  2.   <searchComponent name="suggest" class="solr.SpellCheckComponent">
  3.     <str name="queryAnalyzerFieldType">text</str>
  4.     <lst name="spellchecker">
  5.       <str name="name">suggest</str>
  6.       <str name="classname">org.apache.solr.spelling.suggest.Suggester</str>
  7.       <str name="lookupImpl">org.apache.solr.spelling.suggest.tst.TSTLookup</str>
  8.       <str name="field">Title</str>
  9.       <float name="threshold">0.0001</float>
  10.       <!-- 使用自定义suggest词库词可以将如下两行的注释取消
  11.       <str name="sourceLocation">suggest.txt</str>
  12.       <str name="spellcheckIndexDir">spellchecker</str>
  13.       -->
  14.  
  15.       <str name="comparatorClass">freq</str>
  16.       <str name="buildOnOptimize">true</str>
  17.       <str name="buildOnCommit">true</str>
  18.     </lst>
  19.   </searchComponent>
  20.  
  21.   <requestHandler name="/suggest" class="org.apache.solr.handler.component.SearchHandler">
  22.     <lst name="defaults">
  23.       <str name="spellcheck">true</str>
  24.       <str name="spellcheck.dictionary">suggest</str>
  25.       <str name="spellcheck.count">10</str>
  26.       <str name="spellcheck.onlyMorePopular">true</str>
  27.       <str name="spellcheck.extendedResults">false</str>
  28.       <str name="spellcheck.collate">true</str>
  29.       <!--<str name="spellcheck.build">true</str>  -->
  30.     </lst>
  31.     <arr name="components">
  32.       <str>suggest</str>
  33.     </arr>
  34.   </requestHandler>

举例：

http://localhost:8080/solr/collection1/suggest?wt=xml&indent=true&spellcheck=true&spellcheck.q=tes

http://localhost:8080/solr/collection1/suggest?q=Title:tes&wt=xml&indent=true

该请求执行结果如下：

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <response>
  3.   <lst name="responseHeader">
  4.     <int name="status">0</int>
  5.     <int name="QTime">1</int>
  6.   </lst>
  7.   <lst name="spellcheck">
  8.     <lst name="suggestions">
  9.       <lst name="tes">
  10.         <int name="numFound">1</int><int name="startOffset">0</int><int name="endOffset">3</int>-<arr name="suggestion">
  11.           <str>test</str>
  12.         </arr>
  13.       </lst>
  14.       <str name="collation">test</str>
  15.     </lst>
  16.   </lst>
  17. </response>

分层查询（facet）

作用：Facet是solr的高级搜索功能之一，可以给用户提供更友好的搜索体验。在搜索关键字的同时，能够按照Facet的字段进行分组并统计。Facet是Solr默认集成的一个组件。

配置：无需额外配置

特别说明：

1、适宜被Facet的字段

　　一般代表了实体的某种公共属性，如商品的分类、商品的制造厂家、书籍的出版商等等。

2、Facet字段的要求

　　Facet的字段必须被索引，一般来说该字段无需分词，无需存储。

无需分词是因为该字段的值代表了一个整体概念，另外该字段的值无需进行大小写转换等处理，保持其原貌即可。

无需存储是因为一般而言用户所关心的并不是该字段的具体值，而是作为对查询结果进行分组的一种手段，用户一般会沿着这个分组进一步深入搜索。

3、特殊情况

对于一般查询而言，分词和存储都是必要的。比如CPU类型”Intel 酷睿2双核 P7570”, 拆分成”Intel”,”酷睿”,”P7570”这样一些关键字并分别索引，可能提供更好的搜索体验。但是如果将CPU作为Facet字段，最好不进行分词，这样就造成了矛盾，解决方法为，将CPU字段设置为不分词不存储，然后建立另外一个字段为它的COPY，对这个COPY的字段进行分词和存储。

参数说明：

Field Facet ：Facet字段通过在请求中加入facet.field参数加以声明,如果需要对多个字段进行Facet查询,那么将该参数声明多次。

各个Facet字段互不影响,且可以针对每个Facet字段设置查询参数。形式为：f.字段名.参数名=参数值，字段为为空代表应用于所有facet字段

举例：

http://localhost:8080/solr/collection1/select/?q=*:*&indent=on&facet=on&facet.field=ArticleTypeName&facet.field=EditorialOfficeName

该请求执行结果如下：

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <response>
  3.   <lst name="responseHeader">
  4.     <int name="status">0</int>
  5.     <int name="QTime">1</int>
  6.     <lst name="params">
  7.       <str name="facet">on</str>
  8.       <str name="indent">on</str>
  9.       <str name="q">ArticleId:5</str>
  10.       <arr name="facet.field">
  11.         <str>ArticleTypeName</str>
  12.         <str>EditorialOfficeName</str>
  13.       </arr>
  14.     </lst>
  15.   </lst>
  16.   <result name="response" start="0" numFound="1">
  17.     <doc>
  18.       <str name="TypeId">2</str>
  19.       <str name="ArticleId">5</str>
  20.       <bool name="IsDelete">false</bool>
  21.       <str name="EditorialOfficeId">2</str>
  22.       <str name="Content">content five</str>
  23.       <date name="CreateDate">2014-03-24T16:00:00Z</date>
  24.       <str name="Title">test title 5 five</str>
  25.       <str name="ArticleTypeName">体育</str>
  26.       <str name="EditorialOfficeName">燕赵都市报</str>
  27.       <long name="_version_">1463443978500177920</long>
  28.     </doc>
  29.   </result>
  30.   <lst name="facet_counts">
  31.     <lst name="facet_queries"/>
  32.     <lst name="facet_fields">
  33.       <lst name="ArticleTypeName">
  34.         <int name="体育">1</int>
  35.         <int name="财经">0</int>
  36.       </lst>
  37.       <lst name="EditorialOfficeName">
  38.         <int name="燕赵都市报">1</int>
  39.         <int name="光明日报">0</int>
  40.         <int name="北京晚报">0</int>
  41.       </lst>
  42.     </lst>
  43.     <lst name="facet_dates"/>
  44.     <lst name="facet_ranges"/>
  45.   </lst>
  46. </response>

Date Facet ：Solr为日期字段提供了更为方便的日期查询统计方式，字段的类型必须是DateField(或其子类型)。

需要注意的是使用Date Facet时，字段名、起始时间、结束时间、时间间隔这4个参数都必须提供。

举例：

http://localhost:8080/solr/collection1/select/?q=*:*&indent=on&facet=on&facet.date=CreateDate&facet.date.start=2014-3-10T0:0:0Z&facet.date.end=2014-3-26T0:0:0Z&facet.date.gap=%2B1DAY&facet.date.other=all

该请求执行结果如下：

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <response>
  3.   <lst name="responseHeader">
  4.     <int name="status">0</int>
  5.     <int name="QTime">39</int>
  6.     <lst name="params">
  7.       <str name="facet.date.start">2014-3-10T0:0:0Z</str>
  8.       <str name="facet">on</str>
  9.       <str name="indent">on</str>
  10.       <str name="q">*:*</str>
  11.       <str name="facet.date">CreateDate</str>
  12.       <str name="facet.date.other">all</str>
  13.       <str name="facet.date.gap">+1DAY</str>
  14.       <str name="facet.date.end">2014-3-26T0:0:0Z</str>
  15.     </lst>
  16.   </lst>
  17.   <result name="response" start="0" numFound="6">
  18.     <doc>
  19.       <str name="TypeId">2</str>
  20.       <str name="ArticleId">5</str>
  21.       <bool name="IsDelete">false</bool>
  22.       <str name="EditorialOfficeId">2</str>
  23.       <str name="Content">content five</str>
  24.       <date name="CreateDate">2014-03-24T16:00:00Z</date>
  25.       <str name="Title">test title 5 five</str>
  26.       <str name="ArticleTypeName">体育</str>
  27.       <str name="EditorialOfficeName">燕赵都市报</str>
  28.       <long name="_version_">1463443978500177920</long>
  29.     </doc>
  30.     <doc>
  31.       <str name="TypeId">2</str>
  32.       <str name="ArticleId">6</str>
  33.       <bool name="IsDelete">false</bool>
  34.       <str name="EditorialOfficeId">3</str>
  35.       <str name="Content">content six</str>
  36.       <date name="CreateDate">2014-03-25T16:00:00Z</date>
  37.       <str name="Title">test title 6 six</str>
  38.       <str name="ArticleTypeName">体育</str>
  39.       <str name="EditorialOfficeName">北京晚报</str>
  40.       <long name="_version_">1463443978552606720</long>
  41.     </doc>
  42.     <doc>
  43.       <str name="TypeId">1</str>
  44.       <str name="ArticleId">7</str>
  45.       <bool name="IsDelete">false</bool>
  46.       <str name="EditorialOfficeId">1</str>
  47.       <str name="Content">content seven</str>
  48.       <date name="CreateDate">2014-03-26T16:00:00Z</date>
  49.       <str name="Title">test title 7 seven</str>
  50.       <str name="ArticleTypeName">财经</str>
  51.       <str name="EditorialOfficeName">光明日报</str>
  52.       <long name="_version_">1463443978554703872</long>
  53.     </doc>
  54.     <doc>
  55.       <str name="TypeId">1</str>
  56.       <str name="ArticleId">8</str>
  57.       <bool name="IsDelete">false</bool>
  58.       <str name="EditorialOfficeId">2</str>
  59.       <str name="Content">content eight</str>
  60.       <date name="CreateDate">2014-03-27T16:00:00Z</date>
  61.       <str name="Title">test title 8 eight</str>
  62.       <str name="ArticleTypeName">财经</str>
  63.       <str name="EditorialOfficeName">燕赵都市报</str>
  64.       <long name="_version_">1463443978556801024</long>
  65.     </doc>
  66.     <doc>
  67.       <str name="TypeId">1</str>
  68.       <str name="ArticleId">9</str>
  69.       <bool name="IsDelete">false</bool>
  70.       <str name="EditorialOfficeId">3</str>
  71.       <str name="Content">content nine</str>
  72.       <date name="CreateDate">2014-03-28T16:00:00Z</date>
  73.       <str name="Title">test title 9 nine</str>
  74.       <str name="ArticleTypeName">财经</str>
  75.       <str name="EditorialOfficeName">北京晚报</str>
  76.       <long name="_version_">1463443978558898176</long>
  77.     </doc>
  78.     <doc>
  79.       <str name="TypeId">1</str>
  80.       <str name="ArticleId">10</str>
  81.       <bool name="IsDelete">false</bool>
  82.       <str name="EditorialOfficeId">2</str>
  83.       <str name="Content">content ten</str>
  84.       <date name="CreateDate">2014-03-23T16:00:00Z</date>
  85.       <str name="Title">test title 10 ten</str>
  86.       <str name="ArticleTypeName">财经</str>
  87.       <str name="EditorialOfficeName">燕赵都市报</str>
  88.       <long name="_version_">1463443978559946752</long>
  89.     </doc>
  90.   </result>
  91.   <lst name="facet_counts">
  92.     <lst name="facet_queries"/>
  93.     <lst name="facet_fields"/>
  94.     <lst name="facet_dates">
  95.       <lst name="CreateDate">
  96.         <int name="2014-03-10T00:00:00Z">0</int>
  97.         <int name="2014-03-11T00:00:00Z">0</int>
  98.         <int name="2014-03-12T00:00:00Z">0</int>
  99.         <int name="2014-03-13T00:00:00Z">0</int>
  100.         <int name="2014-03-14T00:00:00Z">0</int>
  101.         <int name="2014-03-15T00:00:00Z">0</int>
  102.         <int name="2014-03-16T00:00:00Z">0</int>
  103.         <int name="2014-03-17T00:00:00Z">0</int>
  104.         <int name="2014-03-18T00:00:00Z">0</int>
  105.         <int name="2014-03-19T00:00:00Z">0</int>
  106.         <int name="2014-03-20T00:00:00Z">0</int>
  107.         <int name="2014-03-21T00:00:00Z">0</int>
  108.         <int name="2014-03-22T00:00:00Z">0</int>
  109.         <int name="2014-03-23T00:00:00Z">1</int>
  110.         <int name="2014-03-24T00:00:00Z">1</int>
  111.         <int name="2014-03-25T00:00:00Z">1</int>
  112.         <str name="gap">+1DAY</str>
  113.         <date name="start">2014-03-10T00:00:00Z</date>
  114.         <date name="end">2014-03-26T00:00:00Z</date>
  115.         <int name="before">0</int>
  116.         <int name="after">3</int>
  117.         <int name="between">3</int>
  118.       </lst>
  119.     </lst>
  120.     <lst name="facet_ranges"/>
  121.   </lst>
  122. </response>

Facet Query ：Facet Query利用类似于filter query的语法提供了更为灵活的Facet，通过facet.query参数，可以对任意字段进行筛选。

举例：

http://localhost:8080/solr/collection1/select/?q=*:*&indent=on&facet=on&facet.query=CreateDate:[2014-3-24T0:0:0Z TO 2014-3-26T0:0:0Z]

该请求执行结果如下：

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <response>
  3.   <lst name="responseHeader">
  4.     <int name="status">0</int>
  5.     <int name="QTime">1</int>
  6.     <lst name="params">
  7.       <str name="facet">on</str>
  8.       <str name="indent">on</str>
  9.       <str name="facet.query">CreateDate:[2014-3-24T0:0:0Z TO 2014-3-26T0:0:0Z]</str>
  10.       <str name="q">*:*</str>
  11.     </lst>
  12.   </lst>
  13.   <result name="response" start="0" numFound="6">
  14.     <doc>
  15.       <str name="TypeId">2</str>
  16.       <str name="ArticleId">5</str>
  17.       <bool name="IsDelete">false</bool>
  18.       <str name="EditorialOfficeId">2</str>
  19.       <str name="Content">content five</str>
  20.       <date name="CreateDate">2014-03-24T16:00:00Z</date>
  21.       <str name="Title">test title 5 five</str>
  22.       <str name="ArticleTypeName">体育</str>
  23.       <str name="EditorialOfficeName">燕赵都市报</str>
  24.       <long name="_version_">1463443978500177920</long>
  25.     </doc>
  26.     <doc>
  27.       <str name="TypeId">2</str>
  28.       <str name="ArticleId">6</str>
  29.       <bool name="IsDelete">false</bool>
  30.       <str name="EditorialOfficeId">3</str>
  31.       <str name="Content">content six</str>
  32.       <date name="CreateDate">2014-03-25T16:00:00Z</date>
  33.       <str name="Title">test title 6 six</str>
  34.       <str name="ArticleTypeName">体育</str>
  35.       <str name="EditorialOfficeName">北京晚报</str>
  36.       <long name="_version_">1463443978552606720</long>
  37.     </doc>
  38.     <doc>
  39.       <str name="TypeId">1</str>
  40.       <str name="ArticleId">7</str>
  41.       <bool name="IsDelete">false</bool>
  42.       <str name="EditorialOfficeId">1</str>
  43.       <str name="Content">content seven</str>
  44.       <date name="CreateDate">2014-03-26T16:00:00Z</date>
  45.       <str name="Title">test title 7 seven</str>
  46.       <str name="ArticleTypeName">财经</str>
  47.       <str name="EditorialOfficeName">光明日报</str>
  48.       <long name="_version_">1463443978554703872</long>
  49.     </doc>
  50.     <doc>
  51.       <str name="TypeId">1</str>
  52.       <str name="ArticleId">8</str>
  53.       <bool name="IsDelete">false</bool>
  54.       <str name="EditorialOfficeId">2</str>
  55.       <str name="Content">content eight</str>
  56.       <date name="CreateDate">2014-03-27T16:00:00Z</date>
  57.       <str name="Title">test title 8 eight</str>
  58.       <str name="ArticleTypeName">财经</str>
  59.       <str name="EditorialOfficeName">燕赵都市报</str>
  60.       <long name="_version_">1463443978556801024</long>
  61.     </doc>
  62.     <doc>
  63.       <str name="TypeId">1</str>
  64.       <str name="ArticleId">9</str>
  65.       <bool name="IsDelete">false</bool>
  66.       <str name="EditorialOfficeId">3</str>
  67.       <str name="Content">content nine</str>
  68.       <date name="CreateDate">2014-03-28T16:00:00Z</date>
  69.       <str name="Title">test title 9 nine</str>
  70.       <str name="ArticleTypeName">财经</str>
  71.       <str name="EditorialOfficeName">北京晚报</str>
  72.       <long name="_version_">1463443978558898176</long>
  73.     </doc>
  74.     <doc>
  75.       <str name="TypeId">1</str>
  76.       <str name="ArticleId">10</str>
  77.       <bool name="IsDelete">false</bool>
  78.       <str name="EditorialOfficeId">2</str>
  79.       <str name="Content">content ten</str>
  80.       <date name="CreateDate">2014-03-23T16:00:00Z</date>
  81.       <str name="Title">test title 10 ten</str>
  82.       <str name="ArticleTypeName">财经</str>
  83.       <str name="EditorialOfficeName">燕赵都市报</str>
  84.       <long name="_version_">1463443978559946752</long>
  85.     </doc>
  86.   </result>
  87.   <lst name="facet_counts">
  88.     <lst name="facet_queries">
  89.       <int name="CreateDate:[2014-3-24T0:0:0Z TO 2014-3-26T0:0:0Z]">2</int>
  90.     </lst>
  91.     <lst name="facet_fields"/>
  92.     <lst name="facet_dates"/>
  93.     <lst name="facet_ranges"/>
  94.   </lst>
  95. </response>

Range Facet 举例：范围查询统计

http://localhost:8080/solr/collection1/select/?q=*:*&indent=on&facet=on&facet.range=CreateDate&facet.range.start=2014-03-24T16:00:00Z&facet.range.end=2014-03-26T16:00:00Z&facet.range.gap=%2B1DAY

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <response>
  3.   <lst name="responseHeader">
  4.     <int name="status">0</int>
  5.     <int name="QTime">2</int>
  6.     <lst name="params">
  7.       <str name="facet">on</str>
  8.       <str name="indent">on</str>
  9.       <str name="q">*:*</str>
  10.       <str name="facet.range.start">2014-03-24T16:00:00Z</str>
  11.       <str name="facet.range">CreateDate</str>
  12.       <str name="facet.range.gap">+1DAY</str>
  13.       <str name="facet.range.end">2014-03-26T16:00:00Z</str>
  14.     </lst>
  15.   </lst>
  16.   <result name="response" start="0" numFound="6">
  17.     <doc>
  18.       <str name="TypeId">2</str>
  19.       <str name="ArticleId">5</str>
  20.       <bool name="IsDelete">false</bool>
  21.       <str name="EditorialOfficeId">2</str>
  22.       <str name="Content">content five</str>
  23.       <date name="CreateDate">2014-03-24T16:00:00Z</date>
  24.       <str name="Title">test title 5 five</str>
  25.       <str name="ArticleTypeName">体育</str>
  26.       <str name="EditorialOfficeName">燕赵都市报</str>
  27.       <long name="_version_">1463443978500177920</long>
  28.     </doc>
  29.     <doc>
  30.       <str name="TypeId">2</str>
  31.       <str name="ArticleId">6</str>
  32.       <bool name="IsDelete">false</bool>
  33.       <str name="EditorialOfficeId">3</str>
  34.       <str name="Content">content six</str>
  35.       <date name="CreateDate">2014-03-25T16:00:00Z</date>
  36.       <str name="Title">test title 6 six</str>
  37.       <str name="ArticleTypeName">体育</str>
  38.       <str name="EditorialOfficeName">北京晚报</str>
  39.       <long name="_version_">1463443978552606720</long>
  40.     </doc>
  41.     <doc>
  42.       <str name="TypeId">1</str>
  43.       <str name="ArticleId">7</str>
  44.       <bool name="IsDelete">false</bool>
  45.       <str name="EditorialOfficeId">1</str>
  46.       <str name="Content">content seven</str>
  47.       <date name="CreateDate">2014-03-26T16:00:00Z</date>
  48.       <str name="Title">test title 7 seven</str>
  49.       <str name="ArticleTypeName">财经</str>
  50.       <str name="EditorialOfficeName">光明日报</str>
  51.       <long name="_version_">1463443978554703872</long>
  52.     </doc>
  53.     <doc>
  54.       <str name="TypeId">1</str>
  55.       <str name="ArticleId">8</str>
  56.       <bool name="IsDelete">false</bool>
  57.       <str name="EditorialOfficeId">2</str>
  58.       <str name="Content">content eight</str>
  59.       <date name="CreateDate">2014-03-27T16:00:00Z</date>
  60.       <str name="Title">test title 8 eight</str>
  61.       <str name="ArticleTypeName">财经</str>
  62.       <str name="EditorialOfficeName">燕赵都市报</str>
  63.       <long name="_version_">1463443978556801024</long>
  64.     </doc>
  65.     <doc>
  66.       <str name="TypeId">1</str>
  67.       <str name="ArticleId">9</str>
  68.       <bool name="IsDelete">false</bool>
  69.       <str name="EditorialOfficeId">3</str>
  70.       <str name="Content">content nine</str>
  71.       <date name="CreateDate">2014-03-28T16:00:00Z</date>
  72.       <str name="Title">test title 9 nine</str>
  73.       <str name="ArticleTypeName">财经</str>
  74.       <str name="EditorialOfficeName">北京晚报</str>
  75.       <long name="_version_">1463443978558898176</long>
  76.     </doc>
  77.     <doc>
  78.       <str name="TypeId">1</str>
  79.       <str name="ArticleId">10</str>
  80.       <bool name="IsDelete">false</bool>
  81.       <str name="EditorialOfficeId">2</str>
  82.       <str name="Content">content ten</str>
  83.       <date name="CreateDate">2014-03-23T16:00:00Z</date>
  84.       <str name="Title">test title 10 ten</str>
  85.       <str name="ArticleTypeName">财经</str>
  86.       <str name="EditorialOfficeName">燕赵都市报</str>
  87.       <long name="_version_">1463443978559946752</long>
  88.     </doc>
  89.   </result>
  90.   <lst name="facet_counts">
  91.     <lst name="facet_queries"/>
  92.     <lst name="facet_fields"/>
  93.     <lst name="facet_dates"/>
  94.     <lst name="facet_ranges">
  95.       <lst name="CreateDate">
  96.         <lst name="counts">
  97.           <int name="2014-03-24T16:00:00Z">1</int>
  98.           <int name="2014-03-25T16:00:00Z">1</int>
  99.         </lst>
  100.         <str name="gap">+1DAY</str>
  101.         <date name="start">2014-03-24T16:00:00Z</date>
  102.         <date name="end">2014-03-26T16:00:00Z</date>
  103.       </lst>
  104.     </lst>
  105.   </lst>
  106. </response>

分组统计：

分组示例（group）：

http://localhost:8080/solr/collection1/select?q=*:*&wt=xml&indent=true&group=true&group.field=TypeId&group.ngroups=true

统计示例（stats）：

httphttp://localhost:8080/solr/select?q=*:*&stats=true&stats.field=Price&rows=10&indent=true

该请求执行结果如下：

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <response>
  3.   <lst name="responseHeader">
  4.     <int name="status">0</int>
  5.     <int name="QTime">32</int>
  6.     <lst name="params">
  7.       <str name="indent">true</str>
  8.       <str name="stats.field">Price</str>
  9.       <str name="stats">true</str>
  10.       <str name="q">*:*</str>
  11.       <str name="rows">10</str>
  12.     </lst>
  13.   </lst>
  14.   <result name="response" start="0" numFound="5">
  15.     <doc>
  16.       <str name="TypeId">2</str>
  17.       <str name="ArticleId">6</str>
  18.       <double name="Price">6.0</double>
  19.       <bool name="IsDelete">false</bool>
  20.       <str name="EditorialOfficeId">3</str>
  21.       <str name="Content">content six</str>
  22.       <date name="CreateDate">2014-03-25T16:00:00Z</date>
  23.       <str name="Title">test title 6 six</str>
  24.       <str name="ArticleTypeName">体育</str>
  25.       <str name="EditorialOfficeName">北京晚报</str>
  26.       <long name="_version_">1463715628722421760</long>
  27.     </doc>
  28.     <doc>
  29.       <str name="TypeId">1</str>
  30.       <str name="ArticleId">7</str>
  31.       <double name="Price">7.0</double>
  32.       <bool name="IsDelete">false</bool>
  33.       <str name="EditorialOfficeId">1</str>
  34.       <str name="Content">content seven</str>
  35.       <date name="CreateDate">2014-03-26T16:00:00Z</date>
  36.       <str name="Title">test title 7 seven</str>
  37.       <str name="ArticleTypeName">财经</str>
  38.       <str name="EditorialOfficeName">光明日报</str>
  39.       <long name="_version_">1463715628782190592</long>
  40.     </doc>
  41.     <doc>
  42.       <str name="TypeId">1</str>
  43.       <str name="ArticleId">8</str>
  44.       <double name="Price">8.0</double>
  45.       <bool name="IsDelete">false</bool>
  46.       <str name="EditorialOfficeId">2</str>
  47.       <str name="Content">content eight</str>
  48.       <date name="CreateDate">2014-03-27T16:00:00Z</date>
  49.       <str name="Title">test title 8 eight</str>
  50.       <str name="ArticleTypeName">财经</str>
  51.       <str name="EditorialOfficeName">燕赵都市报</str>
  52.       <long name="_version_">1463715628784287744</long>
  53.     </doc>
  54.     <doc>
  55.       <str name="TypeId">1</str>
  56.       <str name="ArticleId">9</str>
  57.       <double name="Price">9.0</double>
  58.       <bool name="IsDelete">false</bool>
  59.       <str name="EditorialOfficeId">3</str>
  60.       <str name="Content">content nine</str>
  61.       <date name="CreateDate">2014-03-28T16:00:00Z</date>
  62.       <str name="Title">test title 9 nine</str>
  63.       <str name="ArticleTypeName">财经</str>
  64.       <str name="EditorialOfficeName">北京晚报</str>
  65.       <long name="_version_">1463715628786384896</long>
  66.     </doc>
  67.     <doc>
  68.       <str name="TypeId">1</str>
  69.       <str name="ArticleId">10</str>
  70.       <double name="Price">10.0</double>
  71.       <bool name="IsDelete">false</bool>
  72.       <str name="EditorialOfficeId">2</str>
  73.       <str name="Content">content ten</str>
  74.       <date name="CreateDate">2014-03-23T16:00:00Z</date>
  75.       <str name="Title">test title 10 ten</str>
  76.       <str name="ArticleTypeName">财经</str>
  77.       <str name="EditorialOfficeName">燕赵都市报</str>
  78.       <long name="_version_">1463715628788482048</long>
  79.     </doc>
  80.   </result>
  81.   <lst name="stats">
  82.     <lst name="stats_fields">
  83.       <lst name="Price">
  84.         <double name="min">6.0</double>
  85.         <double name="max">10.0</double>
  86.         <long name="count">5</long>
  87.         <long name="missing">0</long>
  88.         <double name="sum">40.0</double>
  89.         <double name="sumOfSquares">330.0</double>
  90.         <double name="mean">8.0</double>
  91.         <double name="stddev">1.5811388300841898</double>
  92.         <lst name="facets"/>
  93.       </lst>
  94.     </lst>
  95.   </lst>
  96. </response>

注：统计字段应为数字类型，如果为字符串类型则统计结果不全。

自动聚合（clustering）

作用：能够把检索到的内容自动分类。

配置：在solrconfig.xml中配置如下

  1. <config>
  2.   <searchComponent name="clustering"
  3.                    enable="${solr.clustering.enabled:true}"
  4.                    class="solr.clustering.ClusteringComponent" >
  5.     <lst name="engine">
  6.       <str name="name">lingo</str>
  7.       <str name="carrot.algorithm">org.carrot2.clustering.lingo.LingoClusteringAlgorithm</str>
  8.       <str name="carrot.resourcesDir">clustering/carrot2</str>
  9.     </lst>
  10.  
  11.     <!-- An example definition for the STC clustering algorithm. -->
  12.     <lst name="engine">
  13.       <str name="name">stc</str>
  14.       <str name="carrot.algorithm">org.carrot2.clustering.stc.STCClusteringAlgorithm</str>
  15.     </lst>
  16.  
  17.     <!-- An example definition for the bisecting kmeans clustering algorithm. -->
  18.     <lst name="engine">
  19.       <str name="name">kmeans</str>
  20.       <str name="carrot.algorithm">org.carrot2.clustering.kmeans.BisectingKMeansClusteringAlgorithm</str>
  21.     </lst>
  22.   </searchComponent>
  23.  
  24.   <requestHandler name="/clustering"
  25.                   startup="lazy"
  26.                   enable="${solr.clustering.enabled:true}"
  27.                   class="solr.SearchHandler">
  28.     <lst name="defaults">
  29.       <bool name="clustering">true</bool>
  30.       <bool name="clustering.results">true</bool>
  31.       <str name="carrot.title">name</str>
  32.       <str name="carrot.url">id</str>
  33.       <str name="carrot.snippet">features</str>
  34.       <bool name="carrot.produceSummary">true</bool>
  35.       <bool name="carrot.outputSubClusters">false</bool>
  36.       <str name="defType">edismax</str>
  37.       <str name="qf">
  38.         text^0.5 features^1.0 name^1.2 sku^1.5 id^10.0 manu^1.1 cat^1.4
  39.       </str>
  40.       <str name="q.alt">*:*</str>
  41.       <str name="rows">10</str>
  42.       <str name="fl">*,score</str>
  43.     </lst>
  44.     <arr name="last-components">
  45.       <str>clustering</str>
  46.     </arr>
  47.   </requestHandler>
  48. </config>

举例：

http://localhost:8080/solr/clustering?q=*:*&rows=10&LingoClusteringAlgorithm.desiredClusterCountBase=20

该请求执行结果如下：

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <response>
  3.   <lst name="responseHeader">
  4.     <int name="status">0</int>
  5.     <int name="QTime">12</int>
  6.   </lst>
  7.   <result name="response" start="0" numFound="6" maxScore="0.42292467">
  8.     <doc>
  9.       <str name="TypeId">2</str>
  10.       <str name="ArticleId">5</str>
  11.       <bool name="IsDelete">false</bool>
  12.       <str name="EditorialOfficeId">2</str>
  13.       <str name="Content">content five</str>
  14.       <date name="CreateDate">2014-03-24T16:00:00Z</date>
  15.       <str name="Title">test title 5 five</str>
  16.       <str name="ArticleTypeName">体育</str>
  17.       <str name="EditorialOfficeName">燕赵都市报</str>
  18.       <long name="_version_">1463443978500177920</long>
  19.       <float name="score">0.42292467</float>
  20.     </doc>
  21.     <doc>
  22.       <str name="TypeId">2</str>
  23.       <str name="ArticleId">6</str>
  24.       <bool name="IsDelete">false</bool>
  25.       <str name="EditorialOfficeId">3</str>
  26.       <str name="Content">content six</str>
  27.       <date name="CreateDate">2014-03-25T16:00:00Z</date>
  28.       <str name="Title">test title 6 six</str>
  29.       <str name="ArticleTypeName">体育</str>
  30.       <str name="EditorialOfficeName">北京晚报</str>
  31.       <long name="_version_">1463443978552606720</long>
  32.       <float name="score">0.42292467</float>
  33.     </doc>
  34.     <doc>
  35.       <str name="TypeId">1</str>
  36.       <str name="ArticleId">7</str>
  37.       <bool name="IsDelete">false</bool>
  38.       <str name="EditorialOfficeId">1</str>
  39.       <str name="Content">content seven</str>
  40.       <date name="CreateDate">2014-03-26T16:00:00Z</date>
  41.       <str name="Title">test title 7 seven</str>
  42.       <str name="ArticleTypeName">财经</str>
  43.       <str name="EditorialOfficeName">光明日报</str>
  44.       <long name="_version_">1463443978554703872</long>
  45.       <float name="score">0.42292467</float>
  46.     </doc>
  47.     <doc>
  48.       <str name="TypeId">1</str>
  49.       <str name="ArticleId">8</str>
  50.       <bool name="IsDelete">false</bool>
  51.       <str name="EditorialOfficeId">2</str>
  52.       <str name="Content">content eight</str>
  53.       <date name="CreateDate">2014-03-27T16:00:00Z</date>
  54.       <str name="Title">test title 8 eight</str>
  55.       <str name="ArticleTypeName">财经</str>
  56.       <str name="EditorialOfficeName">燕赵都市报</str>
  57.       <long name="_version_">1463443978556801024</long>
  58.       <float name="score">0.42292467</float>
  59.     </doc>
  60.     <doc>
  61.       <str name="TypeId">1</str>
  62.       <str name="ArticleId">9</str>
  63.       <bool name="IsDelete">false</bool>
  64.       <str name="EditorialOfficeId">3</str>
  65.       <str name="Content">content nine</str>
  66.       <date name="CreateDate">2014-03-28T16:00:00Z</date>
  67.       <str name="Title">test title 9 nine</str>
  68.       <str name="ArticleTypeName">财经</str>
  69.       <str name="EditorialOfficeName">北京晚报</str>
  70.       <long name="_version_">1463443978558898176</long>
  71.       <float name="score">0.42292467</float>
  72.     </doc>
  73.     <doc>
  74.       <str name="TypeId">1</str>
  75.       <str name="ArticleId">10</str>
  76.       <bool name="IsDelete">false</bool>
  77.       <str name="EditorialOfficeId">2</str>
  78.       <str name="Content">content ten</str>
  79.       <date name="CreateDate">2014-03-23T16:00:00Z</date>
  80.       <str name="Title">test title 10 ten</str>
  81.       <str name="ArticleTypeName">财经</str>
  82.       <str name="EditorialOfficeName">燕赵都市报</str>
  83.       <long name="_version_">1463443978559946752</long>
  84.       <float name="score">0.42292467</float>
  85.     </doc>
  86.   </result>
  87.   <arr name="clusters">
  88.     <lst>
  89.       <arr name="labels">
  90.         <str>Other Topics</str>
  91.       </arr>
  92.       <double name="score">0.0</double>
  93.       <bool name="other-topics">true</bool>
  94.       <arr name="docs">
  95.         <str>5</str>
  96.         <str>6</str>
  97.         <str>7</str>
  98.         <str>8</str>
  99.         <str>9</str>
  100.         <str>10</str>
  101.       </arr>
  102.     </lst>
  103.   </arr>
  104. </response>

注意事项：

使用该功能需要在%solr_home%/lib目录下添加扩展包：

从下载的solr项目中将

dist/apache-solr-clustering-*.jar，

contrib/clustering目录下的所有jar包，

contrib/clustering/downloads 目录下的所有jar包

加入到%solr_home%/lib中。

简单方法：直接拷贝源码中 dist 及 contrib 文件夹到 %solr_home%/collection1\conf中即可。

相似匹配（MoreLikeThis）

作用：查找相似的document

配置：在solrconfig.xml中配置如下

  1.   <!--相似查询-->
  2.   <requestHandler name="/mlt" class="solr.MoreLikeThisHandler">
  3.   </requestHandler>

参数说明：
mlt：在查询时，打开/关闭 MoreLikeThisComponent 的布尔值。 （true|false）
mlt.count：可选。每一个结果要检索的相似文档数。 （> 0）
mlt.fl：用于创建 MLT 查询的字段。 模式中任何被储存的或含有检索词向量的字段。
mlt.maxqt：可选。查询词语的最大数量。由于长文档可能会有很多关键词语，这样 MLT 查询可能会很大，从而导致反应缓慢或可怕的 TooManyClausesException，该参数只保留最关键的词语。 （> 0）

举例：

http://localhost:8080/solr/mlt?q=ArticleId:5&mlt.true&mlt.fl=Title&mlt.mintf=1&mlt.mindf=1

该请求的意思是查找 ArticleId为 5 的 document ,然后返回与此 document 在 Title 字段上相似的其他 document。需要注意的是 mlt.fl 中的 field 的 termVector=true 才有效果

该请求执行结果如下：

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <response>
  3.   <lst name="responseHeader">
  4.     <int name="status">0</int>
  5.     <int name="QTime">34</int>
  6.   </lst>
  7.   <result name="match" start="0" numFound="1">
  8.     <doc>
  9.       <str name="TypeId">2</str>
  10.       <str name="ArticleId">5</str>
  11.       <bool name="IsDelete">false</bool>
  12.       <str name="EditorialOfficeId">2</str>
  13.       <str name="Content">content five</str>
  14.       <date name="CreateDate">2014-03-24T16:00:00Z</date>
  15.       <str name="Title">test title 5 five</str>
  16.       <str name="ArticleTypeName">体育</str>
  17.       <str name="EditorialOfficeName">燕赵都市报</str>
  18.       <long name="_version_">1463443978500177920</long>
  19.     </doc>
  20.   </result>
  21.   <result name="response" start="0" numFound="5">
  22.     <doc>
  23.       <str name="TypeId">2</str>
  24.       <str name="ArticleId">6</str>
  25.       <bool name="IsDelete">false</bool>
  26.       <str name="EditorialOfficeId">3</str>
  27.       <str name="Content">content six</str>
  28.       <date name="CreateDate">2014-03-25T16:00:00Z</date>
  29.       <str name="Title">test title 6 six</str>
  30.       <str name="ArticleTypeName">体育</str>
  31.       <str name="EditorialOfficeName">北京晚报</str>
  32.       <long name="_version_">1463443978552606720</long>
  33.     </doc>
  34.     <doc>
  35.       <str name="TypeId">1</str>
  36.       <str name="ArticleId">7</str>
  37.       <bool name="IsDelete">false</bool>
  38.       <str name="EditorialOfficeId">1</str>
  39.       <str name="Content">content seven</str>
  40.       <date name="CreateDate">2014-03-26T16:00:00Z</date>
  41.       <str name="Title">test title 7 seven</str>
  42.       <str name="ArticleTypeName">财经</str>
  43.       <str name="EditorialOfficeName">光明日报</str>
  44.       <long name="_version_">1463443978554703872</long>
  45.     </doc>
  46.     <doc>
  47.       <str name="TypeId">1</str>
  48.       <str name="ArticleId">8</str>
  49.       <bool name="IsDelete">false</bool>
  50.       <str name="EditorialOfficeId">2</str>
  51.       <str name="Content">content eight</str>
  52.       <date name="CreateDate">2014-03-27T16:00:00Z</date>
  53.       <str name="Title">test title 8 eight</str>
  54.       <str name="ArticleTypeName">财经</str>
  55.       <str name="EditorialOfficeName">燕赵都市报</str>
  56.       <long name="_version_">1463443978556801024</long>
  57.     </doc>
  58.     <doc>
  59.       <str name="TypeId">1</str>
  60.       <str name="ArticleId">9</str>
  61.       <bool name="IsDelete">false</bool>
  62.       <str name="EditorialOfficeId">3</str>
  63.       <str name="Content">content nine</str>
  64.       <date name="CreateDate">2014-03-28T16:00:00Z</date>
  65.       <str name="Title">test title 9 nine</str>
  66.       <str name="ArticleTypeName">财经</str>
  67.       <str name="EditorialOfficeName">北京晚报</str>
  68.       <long name="_version_">1463443978558898176</long>
  69.     </doc>
  70.     <doc>
  71.       <str name="TypeId">1</str>
  72.       <str name="ArticleId">10</str>
  73.       <bool name="IsDelete">false</bool>
  74.       <str name="EditorialOfficeId">2</str>
  75.       <str name="Content">content ten</str>
  76.       <date name="CreateDate">2014-03-23T16:00:00Z</date>
  77.       <str name="Title">test title 10 ten</str>
  78.       <str name="ArticleTypeName">财经</str>
  79.       <str name="EditorialOfficeName">燕赵都市报</str>
  80.       <long name="_version_">1463443978559946752</long>
  81.     </doc>
  82.   </result>
  83. </response>

高亮显示

作用：将结果中与搜索关键词匹配的地方高亮显示。

配置：无需额外配置

参数说明：

hl 是否启用高亮显示 （true|false）

hl.fl 要进行高亮显示的字段，如需对多个字段显示用逗号分隔（hl.fl=name,name2,name3）

hl.simple.pre 高亮显示前缀标签 （默认<em>）

hl.simple.post 高亮显示后缀标签（默认</em>）

举例：

http://localhost:8080/solr/select?q=ArticleId:9&start=0&rows=10&hl=true&hl.fl=Title

该请求执行结果如下：

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <response>
  3.   <lst name="responseHeader">
  4.     <int name="status">0</int>
  5.     <int name="QTime">2</int>
  6.     <lst name="params">
  7.       <str name="start">0</str>
  8.       <str name="q">ArticleId:9</str>
  9.       <str name="hl.fl">Title</str>
  10.       <str name="hl">true</str>
  11.       <str name="rows">10</str>
  12.     </lst>
  13.   </lst>
  14.   <result name="response" start="0" numFound="1">
  15.     <doc>
  16.       <str name="TypeId">1</str>
  17.       <str name="ArticleId">9</str>
  18.       <bool name="IsDelete">false</bool>
  19.       <str name="EditorialOfficeId">3</str>
  20.       <str name="Content">content nine</str>
  21.       <date name="CreateDate">2014-03-28T16:00:00Z</date>
  22.       <str name="Title">test title 9 nine</str>
  23.       <str name="ArticleTypeName">财经</str>
  24.       <str name="EditorialOfficeName">北京晚报</str>
  25.       <long name="_version_">1463443978558898176</long>
  26.     </doc>
  27.   </result>
  28.   <lst name="highlighting">
  29.     <lst name="9">
  30.       <arr name="Title">
  31.         <str>
  32.           test title <em>9</em> nine
  33.         </str>
  34.       </arr>
  35.     </lst>
  36.   </lst>
  37. </response>

二、索引篇

更新索引（update）

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