详解SpringSecurity中获取当前登录用户的详细信息的几种方法

Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
if (!(authentication instanceof AnonymousAuthenticationToken)) {
    String currentUserName = authentication.getName();
    return currentUserName;
}

UsernamePassWordAuthenticationToken authenticationToken = (UsernamePasswordAuthenticationToken) SecurityContextHolder.getContext().getAuthentication();
// details里面存放了当前登录用户的详细信息
User userDetails = (User) authenticationToken.getDetails();

import java.security.Principal;
import org.springframework.stereotype.Controller;
import org.springframework.WEB.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
 
@RestController
public class SecurityController {
 
    @GetMapping(value = "/username")
    public String currentUserName(Principal principal) {
        return principal.getName();
    }
}

import org.springframework.security.core.Authentication;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
 
@RestController
public class SecurityController {
 
    @GetMapping("/username")
    @ResponseBody
    public String currentUserName(Authentication authentication) {
        return authentication.getName();
    }
}

import java.security.Principal;
import javax.servlet.Http.HttpServletRequest;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
 
@RestController
public class SecurityController {
 
    @GetMapping("/username")
    public String currentUserNameSimple(HttpServletRequest request) {
        Principal principal = request.getUserPrincipal();
        return principal.getName();
    }
}

public interface IAuthenticationFacade {
    Authentication getAuthentication();
}
@Component
public class AuthenticationFacade implements IAuthenticationFacade {
 
    @Override
    public Authentication getAuthentication() {
        return SecurityContextHolder.getContext().getAuthentication();
    }
}

@RestController
public class SecurityController {
    @Autowired
    private IAuthenticationFacade authenticationFacade;
 
    @GetMapping("/username")
    public String currentUserNameSimple() {
        Authentication authentication = authenticationFacade.getAuthentication();
        return authentication.getName();
    }
}

<%@ taglib prefix="security" uri="http://www.springframework.org/security/tags" %>

<security:authorize access="isAuthenticated()">
    authenticated as <security:authentication property="principal.username" /> 
</security:authorize>