16

src/main/java/com/book/demo/mapper/CartMapper.java

@@ -13,7 +13,7 @@ public interface CartMapper {
     void clearCart(String username);
     @Select("select * from cart where username=#{username}")
     Cart queryByName(String username);
-    @Update({"update cart set username=#{username}", "update user_cart set bookname=#{bookname}", "update user_cart set count=#{count}"})
+    @Update("update cart set username=#{username},bookname=#{bookname},count=#{count}")
     int updateCount(String username,String bookname,int count);
 
 }