@Autowired
    private CredentialDao credentialDao;
@RequestMapping(value = "/fisicHost/{id}/credentials", method = RequestMethod.POST)
public String deleteCredential(@PathVariable(value = "id") String credId){
    String[] parts = credId.split("-");
    int id = Integer.parseInt(parts[1]);
    Credential c = credentialDao.getCredentialById(id);
    credentialDao.delete(c);
    return "justreturnsomething";
}

@Override
public void delete(Credential credential) {
    Session session = sessionFactory.openSession();
    session.delete(credential);
    session.close();
}

$("#credentialsTable").on('click',"button[id^='del-']",  (e) => {
    var credentialId = e.target.id;
        console.log('credId' + credentialId);
        $.post( "/fisicHost/" + credentialId + "/credentials", data => {
        console.log(data);
    });
});