- Case-insensitive matching: https://blogs.oracle.com/xuemingshen/entry/case_insensitive_matching_in_java
- (?i) means: for ASCII case-insensitive matching:
- "XYZxyz".matches("(?i)[a-z]+")
- (?iu) means: for Unicode case-folding
- s
- s
- s
- s
- ss
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Java Regex
原文：http://www.cnblogs.com/wade-case/p/3839757.html
