apache common validator

http://www.egovframe.org/wiki/doku.php?id=egovframework:rte:ptl:security:jakarta_commons_validator

http://happybruce.com/entry/%ED%8E%8C%EA%B8%80-Apache-Commons-Validator%EC%9D%98-validationxml-%EC%84%A4%EB%AA%85-ver-113

http://mainia.tistory.com/336