算是很全各種方式啦，就看哪種最適合在項目使用了

第一種方式，從 Authentication 獲取

@RestController
public class IndexController {

    @GetMapping("/no-public/user-info")
    String getUserInfo(
            Authentication authentication
    ) {
        return authentication.getName();
    }
}

設(shè)置登錄態(tài)的時候，填充到 principal 的是 MimeayDetail 類，在使用的時候可以將 authentication.getPrincipal() 轉(zhuǎn)成 MimeayDetail

@RestController
public class IndexController {

    @GetMapping("/no-public/user-info")
    MimeayDetail getUserInfo(
            Authentication authentication
    ) {
        MimeayDetail mimeayDetail = (MimeayDetail) authentication.getPrincipal();
        return mimeayDetail;
    }
}

第二種方式, 從 Principal 獲取

@RestController
public class IndexController {
    
    @GetMapping("/no-public/user-info")
    String getUserInfo(
            Principal principal
    ) {
        return principal.getName();
    }
}

第三種方式, 從自定義的用戶類取

取整個自定義用戶實體

@RestController
public class IndexController {

    @GetMapping("/no-public/user-info")
    MimeayDetail getUserInfo(
            @AuthenticationPrincipal MimeayDetail mimeayDetail
    ) {
        return mimeayDetail;
    }
}

自定義用戶類內(nèi)容

{
  "id": 1,
  "nickname": "chenxiaochi"
}

取自定義用戶實體某個字段

public class IndexController {

    @GetMapping("/no-public/user-info")
    String getUserInfo(
            @AuthenticationPrincipal(expression = "nickname") String nickname
    ) {
        return nickname;
    }
}

查閱文檔的時候，有一個做法也還不錯，不想在程序中使用 AuthenticationPrincipal， 則可以在包裝一層

@Target({ElementType.TYPE, ElementType.PARAMETER})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@AuthenticationPrincipal
public @interface MimeayUserDetail {
}

使用的時候就變成這樣

@RestController
public class IndexController {

    @GetMapping("/no-public/user-info")
    MimeayDetail getUserInfo(
            @MimeayUserDetail MimeayDetail mimeayDetail
            ) {
        return mimeayDetail;
    }
}

其他方式

從 CurrentSecurityContext 獲取

@RestController
public class IndexController {

    @GetMapping("/no-public/user-info")
    String getUserInfo(
           @CurrentSecurityContext(expression = "authentication") Authentication authentication
    ) {
        return authentication.getName();
    }
}

從 SecurityContextHolder 獲取

@RestController
public class IndexController {

    @GetMapping("/no-public/user-info")
    MimeayDetail getUserInfo(
    ) {
        MimeayDetail mimeayDetail = (MimeayDetail) SecurityContextHolder.getContext().getAuthentication().getPrincipal();
        return mimeayDetail;
    }
}

可運行 demo

https://github.com/imeay/mimeay_security

參考文章

https://www.springcloud.io/post/2022-02/spring-security-get-current-user/#gsc.tab=0
https://www.baeldung.com/get-user-in-spring-security