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@Entity
    @Table(name = "cliente")
    public class Cliente implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long id;
    private String nome;
    private String empresa;

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public String getNome() {
        return nome;
    }

    public void setNome(String nome) {
        this.nome = nome;
    }

    public String getEmpresa() {
        return empresa;
    }

    public void setEmpresa(String empresa) {
        this.empresa = empresa;
    }
  }

@Repository
public interface ClienteRespository extends JpaRepository<Cliente, Long> {

}

public interface ClienteService {

    Cliente save(Cliente cliente);
}

@Service
public class ClienteServiceImpl implements ClienteService {

    @Autowired
    ClienteRespository clienteRepository;

    @RolesAllowed(value = "ROLE_USER")
    @Override
    public Cliente save(Cliente cliente) {
        return clienteRepository.save(cliente);
    }

}

@Controller
public class WebController {

    @Autowired
    ClienteService clienteService;

    @RequestMapping("/")
    public String home() {
        return "index";
    }

    @RequestMapping(name = "/salvar", method = RequestMethod.GET)
    public String salvar() {
        Cliente cliente = new Cliente();
        cliente.setNome("Carlos");
        cliente.setEmpresa("Logic");

        clienteService.save(cliente);

        return "redirect:/";
    }

<!DOCTYPE html>
<html>
    <head>
        <title>Página Inicial</title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
    </head>
    <body>
        <div>Página Inicial</div><br />
    </body>
</html>

#Perfil
spring.profiles.active=dev

#Banco de Dados
spring.datasource.url=jdbc:postgresql://localhost:5432/bancoteste
spring.datasource.username=postgres
spring.datasource.password=postgres

#JPA
spring.jpa.hibernate.ddl-auto=create-drop
spring.jpa.show-sql=true

#fix jpa postgres
spring.jpa.properties.hibernate.jdbc.lob.non_contextual_creation=true