Regex片段__Java

 String strs = "IP:192.168.8.216 -- [26/Feb/2001/ 10:12:12 -0500]";
  String regxs = "([0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3})\\s\\-\\-\\s\\[([^\\]]+)\\]";（ 要使用Regex已有意義的符合時要用在字元錢加雙反斜線）
  PatternCompiler compiler = new Perl5Compiler();
  Pattern pattern = compiler.compile(regxs);
  PatternMatcher pm = new Perl5Matcher();
  if(pm.contains(strs, pattern)){
   MatchResult maResult = pm.getMatch();
   System.out.println(maResult.group(1));
  }