使用Lucene進行索引查詢時發現有一部分詞會被分詞器直接忽略掉了，被忽略的分詞稱為stopWords,在英文中通常是一些語氣助詞或者無法表達明確含義的詞。

在定義含有stopWords分詞器的時候都會指定stopWords，如果沒有指定可以引用預設的stopWords，在StandardAnalyzer、StopAnalyzer和ClassicAnalyzer分詞器中stopWords是

      "a", "an", "and", "are", "as", "at", "be", "but", "by", 
      "for", "if", "in", "into", "is"
 
, "it", 
      "no", "not", "of", "on", "or", "such", 
      "that", "the", "their", "then", "there", "these", 
      "they", "this", "to", "was", "will", "with"

如果想使用自定義的StopWords可以使用lucene提供的StopWordAnalyzer：

      public static final String[] self_stop_words={ "a", "an", "and", "are", "as", "at"
 
, "be", "but", "by",  
            "for", "if", "in", "into", "is", "it",  
            "no", "not", "of", "on", "or", "such",  
            "that", "the", "their", "then", "there", "these",  
            "they", "this", "to", "was", "will", "with",  
            "very"  
      };

      //Analyzer analyzer=new StopAnalyzer();  
 

      Analyzer analyzer=new StopAnalyzer(self_stop_words);