SecurityUtils { public static String getCurrentLogin() { SecurityContext securityContext = SecurityContextHolder.getContext(); Authentication authentication = securityContext.getAuthentication(); UserDetails springSecurityUser = null; String userName = null; if(authentication != null) { if (authentication.getPrincipal() instanceof UserDetails) { springSecurityUser = (UserDetails) authentication.getPrincipal(); userName = springSecurityUser.getUsername(); } else if (authentication.getPrincipal() instanceof String) { userName = (String) authentication.getPrincipal(); } } return userName; } private  SecurityUtils(); static String getCurrentLogin(); static boolean isAuthenticated(); static boolean isUserInRole(String authority);  }
@Test public void testGetCurrentLogin() { SecurityContext securityContext = SecurityContextHolder.createEmptyContext(); securityContext.setAuthentication(new UsernamePasswordAuthenticationToken("admin", "admin")); SecurityContextHolder.setContext(securityContext); String login = SecurityUtils.getCurrentLogin(); assertThat(login).isEqualTo("admin"); }