diff --git a/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysUserServiceImpl.java b/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysUserServiceImpl.java
index b50f8e8..fc9758d 100644
--- a/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysUserServiceImpl.java
+++ b/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysUserServiceImpl.java
@@ -518,7 +518,7 @@ public class SysUserServiceImpl implements ISysUserService, UserService {
         return ObjectUtil.isNull(sysUser) ? null : sysUser.getUserName();
     }
 
-    @Cacheable(cacheNames = CacheNames.SYS_NICK_NAME, key = "#userId")
+    @Cacheable(cacheNames = CacheNames.SYS_NICK_NAME, key = "#userId" ,condition = "#userId != null", unless = "#result == null")
     @Override
     public String selectNickNameById(Long userId) {
         SysUser sysUser = baseMapper.selectOne(new LambdaQueryWrapper<SysUser>()