diff --git a/litemall-db/src/main/java/org/linlinjava/litemall/db/service/LitemallCommentService.java b/litemall-db/src/main/java/org/linlinjava/litemall/db/service/LitemallCommentService.java
index 19b6c37b4fbc19f6644aaf90858cc817dc9b0525..36a2d5982cf71121f3a702aef921b2014fbe6f4f 100644
--- a/litemall-db/src/main/java/org/linlinjava/litemall/db/service/LitemallCommentService.java
+++ b/litemall-db/src/main/java/org/linlinjava/litemall/db/service/LitemallCommentService.java
@@ -104,4 +104,16 @@ public class LitemallCommentService {
         commentMapper.logicalDeleteByPrimaryKey(id);
     }
 
+    public int add(LitemallComment comment) {
+        return commentMapper.insertSelective(comment);
+    }
+
+    public LitemallComment findById(Integer id) {
+        return commentMapper.selectByPrimaryKeySelective(id);
+    }
+
+    public int updateById(LitemallComment comment) {
+        return commentMapper.updateByPrimaryKeySelective(comment);
+    }
+
 }