diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/WxPayServiceImpl.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/WxPayServiceImpl.java
index c26d058392..bef07840fa 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/WxPayServiceImpl.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/WxPayServiceImpl.java
@@ -196,17 +196,43 @@ public Map<String, String> getPayInfo(WxPayUnifiedOrderRequest request) throws W
     }
 
     Map<String, String> payInfo = new HashMap<>();
-    payInfo.put("appId", getConfig().getAppId());
-    // 支付签名时间戳，注意微信jssdk中的所有使用timestamp字段均为小写。
-    // 但最新版的支付后台生成签名使用的timeStamp字段名需大写其中的S字符
-    payInfo.put("timeStamp", String.valueOf(System.currentTimeMillis() / 1000));
-    payInfo.put("nonceStr", String.valueOf(System.currentTimeMillis()));
-    payInfo.put("package", "prepay_id=" + prepayId);
-    payInfo.put("signType", "MD5");
-    if ("NATIVE".equals(request.getTradeType())) {
-      payInfo.put("codeUrl", unifiedOrderResult.getCodeURL());
-    }
-    payInfo.put("paySign", SignUtils.createSign(payInfo, this.getConfig().getMchKey()));
+        if ("NATIVE".equals(request.getTradeType()))
+        {
+            payInfo.put("codeUrl", unifiedOrderResult.getCodeURL());
+        }//APP支付绑定的是微信开放平台上的账号，APPID为开放平台上绑定APP后发放的参数
+        else if ("APP".equals(request.getTradeType()))
+        {
+
+            String appId = getConfig().getAppId();
+            SortedMap<String, String> configMap = new TreeMap<>();
+            // 此map用于参与调起sdk支付的二次签名,格式全小写，timestamp只能是10位,格式固定，切勿修改
+            String partnerid = getConfig().getMchId();
+            configMap.put("prepayid", prepayId);
+            configMap.put("partnerid", partnerid);
+            configMap.put("package", "Sign=WXPay");
+            configMap.put("timestamp", String.valueOf(System.currentTimeMillis() / 1000));
+            configMap.put("noncestr", String.valueOf(System.currentTimeMillis()));
+            configMap.put("appid", appId);
+            // 此map用于客户端与微信服务器交互
+            payInfo.put("paySign", SignUtils.createSign(payInfo, this.getConfig().getMchKey()));
+            payInfo.put("tradeSeqNo", prepayId);
+            payInfo.put("partnerid", partnerid);
+            payInfo.put("appid", appId);
+            payInfo.put("packageValue", "Sign=WXPay");
+            payInfo.put("timestamp", String.valueOf(System.currentTimeMillis() / 1000));
+            payInfo.put("noncestr", String.valueOf(System.currentTimeMillis()));
+        }
+        else if("JSAPI".equals(request.getTradeType()))
+        {
+
+            payInfo.put("appId", unifiedOrderResult.getAppid());
+            // 支付签名时间戳，注意微信jssdk中的所有使用timestamp字段均为小写。但最新版的支付后台生成签名使用的timeStamp字段名需大写其中的S字符
+            payInfo.put("timeStamp", String.valueOf(System.currentTimeMillis() / 1000));
+            payInfo.put("nonceStr", String.valueOf(System.currentTimeMillis()));
+            payInfo.put("package", "prepay_id=" + prepayId);
+            payInfo.put("signType", "MD5");
+            payInfo.put("paySign", SignUtils.createSign(payInfo, this.getConfig().getMchKey()));
+        }
     return payInfo;
   }