Revert "확인 "

This reverts commit 7014200b1515b53955cb9ddf559b613f3f93fdf0.
Revert "충돌 처리 "

This reverts commit 5ffe6a1472da1fbaefe853c8f997df47d3e407fe.
Revert "충돌 처리 "

This reverts commit cb911b7e2f8e6ebfe1e37af80e589a3fe7d0b2a8.
Revert "ㅎㅎ"

This reverts commit 8d93e57d21256377f88087a243926ef97d8a1e13.
Hibernate Validator 추가