diff --git a/bonus-modules/bonus-material-mall/src/main/java/com/bonus/material/order/controller/OrderController.java b/bonus-modules/bonus-material-mall/src/main/java/com/bonus/material/order/controller/OrderController.java
index 659e51d..ed858b9 100644
--- a/bonus-modules/bonus-material-mall/src/main/java/com/bonus/material/order/controller/OrderController.java
+++ b/bonus-modules/bonus-material-mall/src/main/java/com/bonus/material/order/controller/OrderController.java
@@ -213,7 +213,7 @@ public class OrderController extends BaseController {
         //订单金额
         replacements.put("${cost}", orderInfoDto.getCost().toString());
         //订单详情
-        StrBuilder orderDetail = new StrBuilder();
+        StringBuilder orderDetail = new StringBuilder();
         for (OrderDetailDto orderDetailDto : orderDetailsByOrderId) {
             Date rentBeginTime = inputFormat.parse(orderDetailDto.getRentBeginTime().toString());
             String beginTime = outputFormat.format(rentBeginTime);