gamestore_remake

this is a remale of capstone project, methodology as below:

1. convert monolith JDBCTemplate to JPA project
2. single mysql database with these tables: a. invoice (one to many with invoice item , one to one with customer), b. customer, c. invoice_item, d. t_shirt, e. console, f. game
3. TDD

Stages of completion:

1. see if I can do it in JPA or hibernate
2. create util which directly manipulate database tables
3. service layer
4. controller with exception handling

update

1. sucessfully perform the one to many many to one relation among the tables