@Controller
public class timesheetController
{
    @Autowired
    private CustomerDAO customerDAO;

    @GetMapping("/getCustomers")
    public String getCustomers(Model view)
    {
        //get customers from dao
        List<Customer> results = customerDAO.getCustomers();

        //add the customers to the model
        view.addAttribute("customers", results);

        return "list-customers";
    }
}

{
    "Customer_Code": T77A,
    "Customer_Name": CustomerName1
},
{
    "Customer_Code": T77B,
    "Customer_Name": CustomerName2
}

@Controller
public class timesheetController
{
    @Autowired
    private CustomerDAO customerDAO;

    @GetMapping("/getCustomers")
    public List<Customer> getCustomers()
    {
        //get customers from dao
        List<Customer> results = customerDAO.getCustomers();

        return results;
    }
}