摘要：
Wildcards Meaning * 匹配任意（个）字符？ 匹配任意单个字符 [characters] 匹配[characters]中任意字符 [!characters] 匹配不在[characters]中的任意字符 [[:class:]] 匹配所指定类class的任意字符 经常使用到的类字符（集）Character Class Meaning [:alnum:] 匹配任意字母、数字字符 [:alpha:] 匹配任意字母字符 [:digit:] 匹配任意数字字符 [:lower:] 匹配任... 阅读全文
