Sometimes we require to access logged-in users in different services of the Spring Boot project.
Spring Boot which uses Spring Security internally provides a SecurityContextHolder class. This class allows the lookup of the currently authenticated user by instantiating an Authentication class as shown below:
Authentication auth = SecurityContextHolder.getContext().getAuthentication();The authentication instance now provides the following methods:
- Get the username of the logged in user:
getPrincipal() - Get the password of the authenticated user:
getCredentials() - Get the assigned roles of the authenticated user:
getAuthorities() - Get further details of the authenticated user:
getDetails()
Example to get logged-in user using SecurityContextHolder class
Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
// Get user name
authentication.getName()