diff --git a/demo-system/demo-system-biz/src/main/java/com/yxt/demo/system/biz/sys_forum_comment/SysForumCommentMapper.xml b/demo-system/demo-system-biz/src/main/java/com/yxt/demo/system/biz/sys_forum_comment/SysForumCommentMapper.xml
index bb26d34..77870fc 100644
--- a/demo-system/demo-system-biz/src/main/java/com/yxt/demo/system/biz/sys_forum_comment/SysForumCommentMapper.xml
+++ b/demo-system/demo-system-biz/src/main/java/com/yxt/demo/system/biz/sys_forum_comment/SysForumCommentMapper.xml
@@ -9,6 +9,6 @@
         select f.id,f.sid,f.createBySid,f.forumSid,f.content,i.name from sys_forum_comment f
         left join sys_user i
         on f.createBySid = i.sid
-        where f.sid = #{sid}
+        where f.forumSid = #{sid}
     </select>
 </mapper>
\ No newline at end of file
diff --git a/demo-system/demo-system-biz/src/main/java/com/yxt/demo/system/biz/sys_forum_comment/SysForumCommentService.java b/demo-system/demo-system-biz/src/main/java/com/yxt/demo/system/biz/sys_forum_comment/SysForumCommentService.java
index 462d664..dc59ddd 100644
--- a/demo-system/demo-system-biz/src/main/java/com/yxt/demo/system/biz/sys_forum_comment/SysForumCommentService.java
+++ b/demo-system/demo-system-biz/src/main/java/com/yxt/demo/system/biz/sys_forum_comment/SysForumCommentService.java
@@ -49,7 +49,11 @@ public class SysForumCommentService extends MybatisBaseService<SysForumCommentMa
 
     public ResultBean selectSysForumCommentOne(String sid) {
         ResultBean rb = ResultBean.fireFail();
-        SysForumComment sysForumComment = sysForumCommentMapper.selectSysForumCommentOne(sid);
-        return rb.success().setData(sysForumComment);
+        if (sid == null){
+            return rb.setMsg("参数有误，请重试");
+        }else {
+            SysForumComment sysForumComment = sysForumCommentMapper.selectSysForumCommentOne(sid);
+            return rb.success().setData(sysForumComment);
+        }
     }
 }