Lucene有一个默认的stopfilter（ http://lucene.apache.org/core/4_0_0/analyzers-common/org/apache/lucene/analysis/core/StopFilter.html ），有没有人知道这是列表中的单词？
StandardAnalyzer和StopAnalyzer.ENGLISH_STOP_WORDS_SET设置的默认停用词来自StopAnalyzer.ENGLISH_STOP_WORDS_SET ，它们是：
"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"
StopFilter本身没有定义停用词的默认设置。