最新手机号正则表达式：^((17[0-9])|(14[0-9])|(13[0-9])|(15[^4,\D])|(19[^4,\D])|(18[0,1,2,5-9]))\d{8}$
可以为空的手机号正则表达式：^\s{0}$|^((17[0-9])|(14[0-9])|(13[0-9])|(15[^4,\D])|(19[^4,\D])|(18[0,1,2,5-9]))\d{8}$