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+# 接口变更记录 — 2026-04-13 18:11
+
+> **提交** `f72ea0da` · **作者** wx · **时间** 2026-04-13 18:11:42 +0800
+>
+> feat(product-v2): 新增计算行程总里程接口(高德驾车路线API)
+
+## 变更总览
+
+- **hl-product-service-v2**
+  - AdminProduct (+1)
+
+---
+
+## hl-product-service-v2
+
+### AdminProduct
+
+### 🆕 `GET` /admin/product/item/{id}/calculate-mileage — 计算行程总里程
+
+> 根据行程途经点坐标调用高德驾车路线规划API自动计算总驾驶里程(km)。需先保存行程(Step2)。
+
+**参数**
+
+  - `{id}` (`Long`) — 路径参数
+
+**响应** `Result<BigDecimal>`
+
+---
+
+<details>
+<summary>📁 全部变更文件 (点击展开)</summary>
+
+```
+M	hl-product-service-v2/src/main/java/com/hulalv/product/controller/admin/AdminProductController.java
+A	hl-product-service-v2/src/main/java/com/hulalv/product/service/admin/AmapDrivingService.java
+```
+</details>
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