修改参数名，注释

src/main/java/com/caimei365/commodity/service/impl/PageServiceImpl.java

@@ -477,7 +477,7 @@ public class PageServiceImpl implements PageService {
                 }
                 product.setLadderPriceList(ladderPrices);
             }
-            //查询商品收藏情况，1未收藏，0未收藏
+            //查询商品收藏情况，1未收藏，0未收藏，未收藏过该商品用户是null
             Integer like = likeMapper.findLike(userId, productId);
             product.setUserLike(like);
         }

src/main/resources/mapper/UserLikeMapper.xml

@@ -28,7 +28,7 @@
     <select id="findLike" resultType="java.lang.Integer">
         SELECT userLike
         FROM cm_product_userlike
-        WHERE userId = #{userId}
+        WHERE userID = #{userId}
           AND productID = #{productId}
     </select>