package com.baeldung.keycloak; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.GetMapping; import java.security.Principal; import org.springframework.beans.factory.annotation.Autowired; @Controller public class WebController { @Autowired private CustomerDAO customerDAO; @GetMapping(path = "/") public String index() { return "external"; } @GetMapping(path = "/customers") public String customers(Principal principal, Model model) { addCustomers(); Iterable customers = customerDAO.findAll(); model.addAttribute("customers", customers); model.addAttribute("username", principal.getName()); return "customers"; } // add customers for demonstration public void addCustomers() { Customer customer1 = new Customer(); customer1.setAddress("1111 foo blvd"); customer1.setName("Foo Industries"); customer1.setServiceRendered("Important services"); customerDAO.save(customer1); Customer customer2 = new Customer(); customer2.setAddress("2222 bar street"); customer2.setName("Bar LLP"); customer2.setServiceRendered("Important services"); customerDAO.save(customer2); Customer customer3 = new Customer(); customer3.setAddress("33 main street"); customer3.setName("Big LLC"); customer3.setServiceRendered("Important services"); customerDAO.save(customer3); } }