如何实现solr拼写检查器？

问题描述

| 我想使用solr在我的搜索应用程序中实现拼写检查器组件。需要更改什么配置？     

解决方法

        将以下部分添加到您的solrconfig.xml中

    <searchComponent name=\"spellcheck\" class=\"solr.SpellCheckComponent\">

    <lst name=\"spellchecker\">
      <!--
           Optional,it is required when more than one spellchecker is configured.
           Select non-default name with spellcheck.dictionary in request handler.
      -->
      <str name=\"name\">default</str>
      <!-- The classname is optional,defaults to IndexBasedSpellChecker -->
      <str name=\"classname\">solr.IndexBasedSpellChecker</str>
      <!--
               Load tokens from the following field for spell checking,analyzer for the field\'s type as defined in schema.xml are used
      -->
      <str name=\"field\">spell</str>
      <!-- Optional,by default use in-memory index (RAMDirectory) -->
      <str name=\"spellcheckIndexDir\">./spellchecker</str>
      <!-- Set the accuracy (float) to be used for the suggestions. Default is 0.5 -->
      <str name=\"accuracy\">0.7</str>
      <!-- Require terms to occur in 1/100th of 1% of documents in order to be included in the dictionary -->
      <float name=\"thresholdTokenFrequency\">.0001</float>
    </lst>
    <!-- Example of using different distance measure -->
    <lst name=\"spellchecker\">
      <str name=\"name\">jarowinkler</str>
      <str name=\"field\">lowerfilt</str>
      <!-- Use a different Distance Measure -->
      <str name=\"distanceMeasure\">org.apache.lucene.search.spell.JaroWinklerDistance</str>
      <str name=\"spellcheckIndexDir\">./spellchecker</str>

    </lst>

    <!-- This field type\'s analyzer is used by the QueryConverter to tokenize the value for \"q\" parameter -->
    <str name=\"queryAnalyzerFieldType\">textSpell</str>
</searchComponent>
<!--
  The SpellingQueryConverter to convert raw (CommonParams.Q) queries into tokens.  Uses a simple regular expression
  to strip off field markup,boosts,ranges,etc. but it is not guaranteed to match an exact parse from the query parser.

  Optional,defaults to solr.SpellingQueryConverter
-->
<queryConverter name=\"queryConverter\" class=\"solr.SpellingQueryConverter\"/>

<!--  Add to a RequestHandler
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
NOTE:  YOU LIKELY DO NOT WANT A SEPARATE REQUEST HANDLER FOR THIS COMPONENT.  THIS IS DONE HERE SOLELY FOR
THE SIMPLICITY OF THE EXAMPLE.  YOU WILL LIKELY WANT TO BIND THE COMPONENT TO THE /select STANDARD REQUEST HANDLER.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-->


<requestHandler name=\"/spellCheckCompRH\" class=\"solr.SearchHandler\">
    <lst name=\"defaults\">
      <!-- Optional,must match spell checker\'s name as defined above,defaults to \"default\" -->
      <str name=\"spellcheck.dictionary\">default</str>
      <!-- omp = Only More Popular -->
      <str name=\"spellcheck.onlyMorePopular\">false</str>
      <!-- exr = Extended Results -->
      <str name=\"spellcheck.extendedResults\">false</str>
      <!--  The number of suggestions to return -->
      <str name=\"spellcheck.count\">1</str>
    </lst>
<!--  Add to a RequestHandler
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
REPEAT NOTE:  YOU LIKELY DO NOT WANT A SEPARATE REQUEST HANDLER FOR THIS COMPONENT.  THIS IS DONE HERE SOLELY FOR
THE SIMPLICITY OF THE EXAMPLE.  YOU WILL LIKELY WANT TO BIND THE COMPONENT TO THE /select STANDARD REQUEST HANDLER.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-->
    <arr name=\"last-components\">
      <str>spellcheck</str>
    </arr>
  </requestHandler>

来自Solr Wiki的此配置示例， 添加后，您可以请求建立拼写检查器索引

http://localhost:8983/solr/spell?q=some query&spellcheck=true&spellcheck.collate=true&spellcheck.build=true 

请注意，不要在每个请求中都包含查询的最后一部分，因为这将在您每次请求时都建立拼写索引 前一个成为第一个请求之后

http://localhost:8983/solr/spell?q=some query&spellcheck=true&spellcheck.collate=true

在以前的XML性别分析中，不要忘记将字段拼写替换为要在其上构建拼写检查器的字段 现在您可以感受到拼写检查的威力