finish updateCartItemById in controller
create CartItemTest clas
finish CartItemTest class
create CartItemServiceImplTest2 class
replace itemId with item
modify sql
modify name of databases
modify foreign  and primary key
modify sql
modify sql
modify sql
delete useless model
delete useless test
finish CartItemServiceImpl test
rename to CartItemServiceImplTest
rename getItemId to getItem
rename getItemId to getItem
modify sql
modify categoryId to category
modify type of Item mode