src/main/java/com/blog/web/security/SecurityUtil.java


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package com.blog.web.security;

import org.springframework.security.authentication.AnonymousAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;

public class SecurityUtil {
    public static String getSessionUser() {
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        return !(authentication instanceof AnonymousAuthenticationToken) ? authentication.getName() : null;
    }
}