Configuring additional search components 

You can add search components and a handler for the search components. For example, add spell check.

To configure additional search components, add the search component and define it in the handler: For example, to add the Java spelling checking package JaSpell:
<searchComponent class="solr.SpellCheckComponent" name="suggest_jaspell">
    <lst name="spellchecker">
      <str name="name">suggest</str>
      <str name="classname">org.apache.solr.spelling.suggest.Suggester</str>
      <str name="lookupImpl">org.apache.solr.spelling.suggest.jaspell.JaspellLookup</str>
      <str name="field">suggest</str>
      <str name="storeDir">suggest</str>
      <str name="buildOnCommit">true</str>
      <float name="threshold">0.0</float>
    </lst>
  </searchComponent>
Configure the parameters for the request handler:
<requestHandler class="org.apache.solr.handler.component.SearchHandler" name="/suggest">
    <lst name="defaults">
      <str name="spellcheck">true</str>
      <str name="spellcheck.dictionary">suggest</str>
      <str name="spellcheck.collate">true</str>
      <str name="spellcheck.extendedResults">true</str>
    </lst>
    <arr name="last-components">
      <str>suggest_jaspell</str>
    </arr>
  </requestHandler>