solr中WordDelimiterFilter与autoGeneratePhraseQueries的用法

WordDelimiterFilter把单词分割为子单词
例如：
*  - split on intra-word delimiters (by default, all non alpha-numeric characters).
*     - "Wi-Fi" -> "Wi", "Fi"
*  - split on case transitions
*     - "PowerShot" -> "Power", "Shot"
*     - "//hello---there, 'dude'" -> "hello", "there", "dude"
*  - trailing "'s" are removed for each subword
*     - "O'Neil's" -> "O", "Neil"
这样，如果文件包含"Wi-Fi"，搜索"wifi"或者"wi fi"都会match。

属性autoGeneratePhraseQueries="true" (缺省值)会将搜索的词分割成为短语查询。
例如，WordDelimiterFilter会解析“pdp-11”生成短语“pdp 11”而不是两个词PDP或者11
autoGeneratePhraseQueries="true"对于不是用空格分割的语言效果不佳。

这样，搜索“Wi-Fi”就相当于搜索“Wi Fi”