IPv4 regex
private static Regex ipv4Reg = new Regex("^((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])\\.){3}(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])$");
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转载自wanzhanzhuce.iteye.com/blog/2303767
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