add bean of category and CategoryRowMapper
add constructor
add CategoryRowMapper to constructor
add construtor
create bean of ItemRowMapper
modify bean of ItemImpl
annotate codes
add ItemRowMapper to constructor
create bean of PromotionRowMapper
add PromotionRowMapper to comstructor
annotate constructor of CategoryRowMapper
annotate constructor of CategoryRowMapper
add PromotionRowMapper to constructor
add promotionRowMapper to bean of ItemImpl
rename CategoryImple to CategoryImpl
modify CategoryImple to CategoryImpl
rename ItemImple to ItemImpl
modify ItemImle to ItemImpl
modify to ItemImpl in test
rename PromotionImple to PromotionImpl