Finish ErrorMessageDao and ErrorMessageDto
Skeleton logic for ProductMain
Finish getChangeError10 and InsertErrorChangeTable methods
Finish 5 methods to handle error code
Init Change Error table at the beginning
Not check error 20 30 if has error 10
Fix some bugs and commit all transactions at the end
Delete printer comment
Fix bug in initialize log class
Close prepared statement to prenvent exceed maximum cursors
Setting to use JDK 1.4