过滤器对solr中搜索结果的影响

Question

当我在solr中查询“优雅”时，我也得到了“优雅”的结果。

我使用这些过滤器进行索引分析

WhitespaceTokenizerFactory
StopFilterFactory
WordDelimiterFilterFactory
LowerCaseFilterFactory
SynonymFilterFactory
EnglishPorterFilterFactory
RemoveDuplicatesTokenFilterFactory
ReversedWildcardFilterFactory

和查询分析：

WhitespaceTokenizerFactory
SynonymFilterFactory
StopFilterFactory
WordDelimiterFilterFactory
LowerCaseFilterFactory
EnglishPorterFilterFactory
RemoveDuplicatesTokenFilterFactory 

我想知道哪个过滤器会影响我的搜索结果。

Answer 1

<强> EnglishPorterFilterFactory

简短的回答;）

更多信息：

英语波特语是指英语搬运工干扰词汇算法。根据词干（这是一个启发式词根构建者）的优雅和优雅，同样的词干。

您可以在线验证此内容，例如Here。基本上你会看到“eleg ant ”和“eleg ance ”源于同一个词干＆gt;的 ELEG

来自Solr来源：

       public void inform(ResourceLoader loader) {
            String wordFiles = args.get(PROTECTED_TOKENS);
            if (wordFiles != null) {
                try {

这里正好出现了protwords文件：

                    File protectedWordFiles = new File(wordFiles);
                    if (protectedWordFiles.exists()) {
                        List<String> wlist = loader.getLines(wordFiles);
                        //This cast is safe in Lucene
                        protectedWords = new CharArraySet(wlist, false);//No need to go through StopFilter as before, since it just uses a List internally
                    } else {
                        List<String> files = StrUtils
                                .splitFileNames(wordFiles);
                        for (String file : files) {
                            List<String> wlist = loader.getLines(file
                                    .trim());
                            if (protectedWords == null)
                                protectedWords = new CharArraySet(wlist,
                                        false);
                            else
                                protectedWords.addAll(wlist);
                        }
                    }
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
        }

这是影响堵塞的部分。在那里你看到了雪球库的调用

        public EnglishPorterFilter create(TokenStream input) {
            return new EnglishPorterFilter(input, protectedWords);
        }

    }

    /**
     * English Porter2 filter that doesn't use reflection to
     * adapt lucene to the snowball stemmer code.
     */
    @Deprecated
    class EnglishPorterFilter extends SnowballPorterFilter {
        public EnglishPorterFilter(TokenStream source,
                CharArraySet protWords) {
            super (source, new org.tartarus.snowball.ext.EnglishStemmer(),
                    protWords);
        }
    }