sdk新增方法

Signed-off-by: 周晓航 <xiaohang.zhou@freemud.com>

ordercenter-sdk/src/main/java/com/freemud/application/sdk/api/ordercenter/response/OrderItemStatisticsResponse.java

@@ -56,4 +56,10 @@ public class OrderItemStatisticsResponse {
         return aggsName.split("#split#")[3].replace("[", "").replace("]", "");
     }
 
+    /**
+     * 商品productSpec
+     */
+    public String getProductSpec() {
+        return aggsName.split("#split#")[4].replace("[", "").replace("]", "");
+    }
 }