From 56ec7cfc84594e1246039d1754aaf7e710500877 Mon Sep 17 00:00:00 2001
From: tanghc <thc8775@163.com>
Date: Wed, 19 Feb 2020 18:03:06 +0800
Subject: [PATCH] 3.1.0

---
 .../gitee/sop/gatewaycommon/validate/taobao/TaobaoSigner.java | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sop-common/sop-gateway-common/src/main/java/com/gitee/sop/gatewaycommon/validate/taobao/TaobaoSigner.java b/sop-common/sop-gateway-common/src/main/java/com/gitee/sop/gatewaycommon/validate/taobao/TaobaoSigner.java
index 7304fda2..dc831c79 100644
--- a/sop-common/sop-gateway-common/src/main/java/com/gitee/sop/gatewaycommon/validate/taobao/TaobaoSigner.java
+++ b/sop-common/sop-gateway-common/src/main/java/com/gitee/sop/gatewaycommon/validate/taobao/TaobaoSigner.java
@@ -1,6 +1,7 @@
 package com.gitee.sop.gatewaycommon.validate.taobao;
 
 
+import com.gitee.sop.gatewaycommon.bean.SopConstants;
 import com.gitee.sop.gatewaycommon.message.ErrorEnum;
 import com.gitee.sop.gatewaycommon.param.ApiParam;
 import com.gitee.sop.gatewaycommon.validate.AbstractSigner;
@@ -35,6 +36,9 @@ public class TaobaoSigner extends AbstractSigner {
     @Override
     public String buildServerSign(ApiParam param, String secret) {
         String signMethod = param.fetchSignMethod();
+        if (signMethod == null) {
+            signMethod = SopConstants.DEFAULT_SIGN_METHOD;
+        }
         SignEncipher signEncipher = signEncipherMap.get(signMethod);
         if (signEncipher == null) {
             throw ErrorEnum.ISV_INVALID_SIGNATURE_TYPE.getErrorMeta().getException(signMethod);