Regexper
regexper.com
RegExr: Learn, Build, & Test RegEx
RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp).
regexr.com
휴대폰 번호 정규식
^01([0|1|6|7|8|9])([0-9]{3,4})([0-9]{4})$
@Pattern(regexp = "^01([0|1|6|7|8|9])-?([0-9]{3,4})-?([0-9]{4})$")