binarywang
diff --git a/‎weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/EcommerceService.java‎
Lines changed: 16 additions & 1 deletion b/‎weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/EcommerceService.java‎
Lines changed: 16 additions & 1 deletion
diff --git a/‎weixin-java-pay/src/test/java/com/github/binarywang/wxpay/service/LegacyEcommerceApiCompatibilityTest.java‎
Lines changed: 17 additions & 0 deletions b/‎weixin-java-pay/src/test/java/com/github/binarywang/wxpay/service/LegacyEcommerceApiCompatibilityTest.java‎
Lines changed: 17 additions & 0 deletions
@@ -109,7 +109,7 @@ default com.github.binarywang.wxpay.bean.ecommerce.PartnerTransactionsResult que
   /** @deprecated 从 4.8.5.B 起，请改用 {@link #closePartnerOrder(WxPayPartnerOrderCloseV3Request)}；5.0 将移除。 */
   @Deprecated
   default String closePartnerTransactions(com.github.binarywang.wxpay.bean.ecommerce.PartnerTransactionsCloseRequest request) throws WxPayException {
-    closePartnerOrder(LEGACY_ECOMMERCE_GSON.fromJson(LEGACY_ECOMMERCE_GSON.toJson(request), WxPayPartnerOrderCloseV3Request.class));
+    closePartnerOrder(toUnifiedPartnerOrderCloseRequest(request));
     return null;
   }
 
@@ -122,6 +122,21 @@ static SignatureHeader toUnifiedSignatureHeader(com.github.binarywang.wxpay.bean
       .signature(header.getSigned()).serial(header.getSerialNo()).build();
   }
 
+  /**
+   * 旧电商关闭请求转统一模型。
+   * <p>{@code outTradeNo} 在两侧均为 path 参数（{@code transient}），不能走 Gson 往返，否则会丢失。
+   */
+  static WxPayPartnerOrderCloseV3Request toUnifiedPartnerOrderCloseRequest(
+      com.github.binarywang.wxpay.bean.ecommerce.PartnerTransactionsCloseRequest request) {
+    if (request == null) {
+      return null;
+    }
+    return new WxPayPartnerOrderCloseV3Request()
+      .setSpMchId(request.getSpMchid())
+      .setSubMchId(request.getSubMchid())
+      .setOutTradeNo(request.getOutTradeNo());
+  }
+
   /**
    * <pre>
    * 二级商户进件API
 
@@ -1,7 +1,9 @@
 package com.github.binarywang.wxpay.service;
 
+import com.github.binarywang.wxpay.bean.ecommerce.PartnerTransactionsCloseRequest;
 import com.github.binarywang.wxpay.bean.ecommerce.TransactionsResult;
 import com.github.binarywang.wxpay.bean.ecommerce.enums.TradeTypeEnum;
+import com.github.binarywang.wxpay.bean.request.WxPayPartnerOrderCloseV3Request;
 import org.testng.Assert;
 import org.testng.annotations.Test;
 
@@ -68,6 +70,21 @@ public void shouldIncludeTimestampAndNonceInLegacyHeaderEquality() {
     Assert.assertNotEquals(first, second);
   }
 
+  @Test
+  public void shouldPreserveOutTradeNoWhenMappingLegacyCloseRequest() {
+    PartnerTransactionsCloseRequest legacyRequest = new PartnerTransactionsCloseRequest();
+    legacyRequest.setSpMchid("1230000109");
+    legacyRequest.setSubMchid("1900000109");
+    legacyRequest.setOutTradeNo("1217752501201407033233368018");
+
+    WxPayPartnerOrderCloseV3Request unifiedRequest =
+      EcommerceService.toUnifiedPartnerOrderCloseRequest(legacyRequest);
+
+    Assert.assertEquals(unifiedRequest.getSpMchId(), "1230000109");
+    Assert.assertEquals(unifiedRequest.getSubMchId(), "1900000109");
+    Assert.assertEquals(unifiedRequest.getOutTradeNo(), "1217752501201407033233368018");
+  }
+
   @Test
   public void shouldReadLegacySerializedHeaderFields() throws Exception {
     String legacySerializedHeader = "rO0ABXNyADpjb20uZ2l0aHViLmJpbmFyeXdhbmcud3hwYXkuYmVhbi5lY29tbWVyY2UuU2lnbmF0dXJlSGVhZGVyn3ApxLekv9MCAARMAAVub25jZXQAEkxqYXZhL2xhbmcvU3RyaW5nO0wACHNlcmlhbE5vcQB+AAFMAAZzaWduZWRxAH4AAUwACXRpbWVTdGFtcHEAfgABeHB0AAVub25jZXQACXNlcmlhbC1ub3QABnNpZ25lZHQACXRpbWVzdGFtcA==";