Solr4.2.1 拼写检查组件

     
 <!-- 自定义自动完成单个词字段类型 -->	      
 <fieldType class="solr.TextField" name="text_auto_s" positionIncrementGap="100">        
     <analyzer>      
	<tokenizer class="solr.WhitespaceTokenizerFactory"/>      
	<filter class="solr.WordDelimiterFilterFactory" generateWordParts="1" generateNumberParts="1" atenateWords="1" catenateNumbers="1" catenateAll="0" splitOnCaseChange="1"/>      
	<filter class="solr.LowerCaseFilterFactory"/>      
     </analyzer>      
 </fieldType>      
	      
<!-- 自定义自动完成短语字段类型,如果使用词组，你需要定义自己的分词类(对于中文如庖丁、iK等) -->      
<fieldType class="solr.TextField" name="text_auto">        
   <analyzer>      
      <!-- 整个字段做为一个词，不进行分词 -->      
      <tokenizer class="solr.KeywordTokenizerFactory"/>      
      <filter class="solr.LowerCaseFilterFactory"/>      
   </analyzer>      
</fieldType>

     
 <searchComponent name="spellcheck" class="solr.SpellCheckComponent">      
    <!-- 查询分析器，如果不指定的话，默认会使用field字段类型的分词器 
     
         作为拼写检查用，为了提高校正的准确率，一般对校正的词，不要进行分词，所以用string就好了,拼写检查的配置主要是在solrconfig.xml里面配置. -->      
    <str name="queryAnalyzerFieldType">string</str>      
    <lst name="spellchecker">      
      <str name="name">default</str>      
      <str name="field">text_spell</str>      
      <str name="classname">solr.DirectSolrSpellChecker</str>      
      <str name="distanceMeasure">internal</str>      
      <float name="accuracy">0.5</float>      
      <int name="maxEdits">2</int>      
      <int name="minPrefix">1</int>      
      <int name="maxInspections">5</int>      
      <int name="minQueryLength">4</int>      
      <float name="maxQueryFrequency">0.01</float>      
      <!-- uncomment this to require suggestions to occur in 1% of the documents      
      	<float name="thresholdTokenFrequency">.01</float>      
      -->      
    </lst>
     
</searchComponent>
     
      
     
  <requestHandler name="/spell" class="solr.SearchHandler" startup="lazy">
     
    <lst name="defaults">      
      <str name="df">text_spell</str><!--The default field for spell checking. -->      
      <str name="spellcheck.dictionary">default</str>      
      <!--<str name="spellcheck.dictionary">wordbreak</str>-->      
	  <str name="spellcheck">on</str>      
      <str name="spellcheck.extendedResults">true</str>             
      <str name="spellcheck.count">10</str>      
      <str name="spellcheck.alternativeTermCount">5</str>      
      <str name="spellcheck.maxResultsForSuggest">5</str>             
      <str name="spellcheck.collate">true</str>      
      <str name="spellcheck.collateExtendedResults">true</str>        
      <str name="spellcheck.maxCollationTries">10</str>      
      <str name="spellcheck.maxCollations">5</str>               
    </lst>      
    <arr name="last-components">      
      <str>spellcheck</str>      
    </arr>      
  </requestHandler>

     
  <requestHandler name="search" class="solr.SearchHandler" default="true">      
     <lst name="defaults">      
       <str name="echoParams">explicit</str>      
       <str name="q">abcdefghik</str><!-- 增加没有q参数的容错性 -->      
       <int name="rows">10</int>      
     </lst>
     
     <!-- 这行代码非常重要，如果没有这行，拼写检查，是不同时起作用的 -->      
     <arr name="last-components">      
	<str>spellcheck</str>      
     </arr>      
</requestHandler>

      
//拼写检查建议       
query.getSolrQuery().set("spellcheck", "true");	       
query.getSolrQuery().set("spellcheck.q",condition.getSearchWord());       
query.getSolrQuery().set("spellcheck.count", 5);  
      
....
      
        //当搜索不到结果时，显示建议词       
	SpellCheckResponse spellCheckResponse = rsp.getSpellCheckResponse();       
        if (spellCheckResponse != null) {            
        	if(!spellCheckResponse.isCorrectlySpelled()){       
        		List<String> wordList = new ArrayList<String>();       
	        	for(Suggestion s:spellCheckResponse.getSuggestions()){       
	        		wordList.addAll(s.getAlternatives());       
	        	}       
	        	result.setSuggestions(wordList);       
        	}                         
        }