常用正则表达式

自己手写，高手勿笑，留着备用

ip验证： ^(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])$

mac 地址验证 ：[A-Fa-f\d]{2}[A-Fa-f\d]{2}[A-Fa-f\d]{2}[A-Fa-f\d]{2}[A-Fa-f\d]{2}[A-Fa-f\d]{2}