统一多种支付方式创建订单的入参

src/main/java/com/ai/da/service/AliPayService.java

@@ -1,10 +1,12 @@
 package com.ai.da.service;
 
+import com.ai.da.model.dto.ProductPurchaseDTO;
+
 import javax.servlet.http.HttpServletRequest;
 import java.util.Map;
 
 public interface AliPayService {
-    String tradeCreate(Integer amount,String returnUrl, HttpServletRequest request);
+    String tradeCreate(ProductPurchaseDTO productPurchaseDTO, HttpServletRequest request);
 
     String tradeNotify(Map<String, String> params);