生成的全部功能代码，非常粗糙，每个功能都需要进行更改。

src/main/java/com/niuan/erp/common/utils/SecurityUtils.java

@@ -0,0 +1,32 @@
+package com.niuan.erp.common.utils;
+
+import com.niuan.erp.common.base.LoginUser;
+import com.niuan.erp.common.exception.BusinessException;
+import com.niuan.erp.common.exception.SystemException;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.context.SecurityContextHolder;
+
+public class SecurityUtils {
+
+    public static LoginUser getLoginUser() {
+        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
+        if (authentication == null || !authentication.isAuthenticated()) {
+            throw new BusinessException("auth.unLogin");
+        }
+        Object principal = authentication.getPrincipal();
+        System.out.println(principal);
+        if (principal instanceof LoginUser user) {
+            return user;
+        }
+        throw new SystemException("auth.userDetailsError");
+    }
+
+    public static Long getUserId(){
+        return getLoginUser().getUser().getId();
+    }
+
+    public static String getUserName(){
+        return getLoginUser().getUsername();
+    }
+
+}