UserRest.java

package br.com.brunokrebs.rest;
// ... previously added imports ...
import br.com.brunokrebs.repository.UserRepository;
import java.util.List;

@RestController
public class UserRest {

	@Autowired
	private UserRepository userRepository; // our nice repository implementation

	@RequestMapping(path = "/users/", method = RequestMethod.POST)
	public User saveUser(@RequestBody User user) {
		userRepository.save(user); // using it to persist
		return user;
	}

	@RequestMapping(path = "/users/", method = RequestMethod.GET)
	public List<User> getUsers() {
		return userRepository.findAll(); // returning all persisted users
	}
}