solr - 如何在 Solr 中配置词干提取？

Question

我添加到 solr 索引:“美国人”。当我按“美国”搜索时，没有结果。

应该如何配置 schema.xml 以获得结果？

当前配置:

<fieldType name="text" class="solr.TextField" positionIncrementGap="100">
            <analyzer type="index">
                <tokenizer class="solr.WhitespaceTokenizerFactory" />
                <filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt" ignoreCase="true" expand="true" />
                <filter class="solr.StopFilterFactory" ignoreCase="true" words="stopwords.txt" />
                <filter class="solr.WordDelimiterFilterFactory" generateWordParts="1" generateNumberParts="1" catenateWords="1" catenateNumbers="1" catenateAll="0" />
                <filter class="solr.LowerCaseFilterFactory" />
                <filter class="solr.EnglishPorterFilterFactory" protected="protwords.txt" />
                <filter class="solr.RemoveDuplicatesTokenFilterFactory" />
                <filter class="solr.PorterStemFilterFactory"/>
            </analyzer>
            <analyzer type="query">
                <tokenizer class="solr.WhitespaceTokenizerFactory" />
                <filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt" ignoreCase="true" expand="true" />
                <filter class="solr.StopFilterFactory" ignoreCase="true" words="stopwords.txt" />
                <filter class="solr.WordDelimiterFilterFactory" generateWordParts="1" generateNumberParts="1" catenateWords="0" catenateNumbers="0" catenateAll="0" />
                <filter class="solr.LowerCaseFilterFactory" />
                <filter class="solr.EnglishPorterFilterFactory" protected="protwords.txt" />
                <filter class="solr.RemoveDuplicatesTokenFilterFactory" />
                <filter class="solr.PorterStemFilterFactory"/>
            </analyzer>
        </fieldType>

Answer 1

为什么会有两个词干分析器？
尝试删除 EnglishPorterFilterFactory (已弃用)从您的两种分析器类型中重建索引，然后尝试搜索 American 是否会产生 America。

如果这不起作用，您可以尝试的另一件事是删除两个词干过滤器并添加 SnowballPorterFilterFactory与 language="English"反而。