UserDetails userDetails = (UserDetails) authentication.getPrincipal();
System.out.println("User has authorities: " + userDetails.getAuthorities());@Controller
public class GetUserWithHTTPServletRequestController {
@RequestMapping(value = "/username", method = RequestMethod.GET)
@ResponseBody
public String currentUserNameSimple(HttpServletRequest request) {
Principal principal = request.getUserPrincipal();
return principal.getName();
}
}@Controller
public class GetUserWithCustomInterfaceController {
@Autowired
private IAuthenticationFacade authenticationFacade;
@RequestMapping(value = "/username", method = RequestMethod.GET)
@ResponseBody
public String currentUserNameSimple() {
Authentication authentication = authenticationFacade.getAuthentication();
return authentication.getName();
}
}Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
String currentPrincipalName = authentication.getName();@Controller
public class SecurityController {
@RequestMapping(value = "/username", method = RequestMethod.GET)
@ResponseBody
public String currentUserName(Principal principal) {
return principal.getName();
}
}public interface IAuthenticationFacade {
Authentication getAuthentication();
}
@Component
public class AuthenticationFacade implements IAuthenticationFacade {
@Override
public Authentication getAuthentication() {
return SecurityContextHolder.getContext().getAuthentication();
}
}<html xmlns:th="https://www.thymeleaf.org"
xmlns:sec="https://www.thymeleaf.org/thymeleaf-extras-springsecurity5">
<body>
<div sec:authorize="isAuthenticated()">
Authenticated as <span sec:authentication="name"></span></div>
</body>
</html>Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
if (!(authentication instanceof AnonymousAuthenticationToken)) {
String currentUserName = authentication.getName();
return currentUserName;
}@Controller
public class SecurityController {
@RequestMapping(value = "/username", method = RequestMethod.GET)
@ResponseBody
public String currentUserName(Authentication authentication) {
return authentication.getName();
}
}