Solr之拼写检查。

       首先配置solrconfig.xml文件可能已经有这两个元素（如果没有添加即可），需要根据我们自己的系统环境做些适当的修改。

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

<str name = "queryAnalyzerFieldType">text_spell</str>

<lst name = "spellchecker">

<str name = "name">direct</str>

<str name = "field">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">2</int>

<float name = "maxQueryFrequency">0.01</float>

</lst>

</searchComponent>

<requestHandler name = "/spell" class = "solr.SearchHandler" startup = "lazy">

<lst name = "defaults">

<str name = "spellcheck.dictionary">direct</str>

<str name = "spellcheck">on</str>

<str name = "spellcheck.collate">true</str>

<str name = "spellcheck.clooateExtendedResults">true</str>

</lst>

<arr name = "last">

<str>spellcheck</str>

</arr>

</requestHandler>

        配置完成之后，我们进行一下测试，重启Solr后，访问如下链接：
http://localhost:8080/solr/collection1/spell?wt=xml&indent=true&spellcheck=true&spellcheck.q=%E4%B8%AD%E5%9B%BD
<?xml version = "1.0" encoding = "UTF-8" ?>

<response>

<lst name = "responseHeader">

<int name = "status">0</int>

<int name = "QTime">0</int>

</lst>

<result name = "response" numFound = "0" start = "0" />

<lst name = "spellcheck">

<lst name = "suggestions">

<lst name = "beijink">

<int name = "numFound">1</int>

<int name = "startOffset">0</int>

<int name = "endOffset">3</int>

<arr name = "suggestion">

<str>beijing</str>

</arr>

</lst>

</lst>

<lst>

</response>

       使用SOlrJ时也同样加入参数就可以。

SolrQuery query = new SolrQuery();

query.set("q" , ".");

query.set("qt" , "/spell");

QueryResponse rsp = server.query(query);

// ... 上main取结果的代码

SpellCheckResponse spellCheckResponse = rsp.getSpellCheckResponse();

if (spellCheckResponse != null) {

String collaction = spellCheckResponse.getCollatedResult();

}