1、保存订单商品，2、验证参数是否合法

src/main/java/com/gxwebsoft/shop/service/OrderBusinessService.java

@@ -183,11 +183,21 @@ public class OrderBusinessService {
         // 复制请求参数到订单对象
         BeanUtils.copyProperties(request, shopOrder);
 
+        // 确保租户ID正确设置（关键字段，影响微信支付证书路径）
+        shopOrder.setTenantId(loginUser.getTenantId());
+
+        // 验证关键字段
+        if (shopOrder.getTenantId() == null) {
+            throw new BusinessException("租户ID不能为空，这会导致微信支付证书路径错误");
+        }
+
         // 设置用户相关信息
         shopOrder.setUserId(loginUser.getUserId());
         shopOrder.setOpenid(loginUser.getOpenid());
         shopOrder.setPayUserId(loginUser.getUserId());
 
+        log.debug("构建订单对象 - 租户ID：{}，用户ID：{}", shopOrder.getTenantId(), shopOrder.getUserId());
+
         // 生成订单号
         if (shopOrder.getOrderNo() == null) {
             shopOrder.setOrderNo(Long.toString(IdUtil.getSnowflakeNextId()));