🐛 #2246 【微信支付】修复微信支付V3签名/验签的换行符错误问题

参考微信支付文档：
https://pay.weixin.qq.com/wiki/doc/apiv3/apis/chapter3_1_4.shtml
https://pay.weixin.qq.com/wiki/doc/apiv3/wechatpay/wechatpay4_0.shtml

签名时使用的换行符必须是\n，因此不应使用%n，这会导致windows平台下签名错误

Author: gadfly3173

weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayUnifiedOrderV3Result.java

@@ -83,7 +83,7 @@ public static class JsapiResult implements Serializable {
     private String paySign;
 
     private String getSignStr() {
-      return String.format("%s%n%s%n%s%n%s%n", appId, timeStamp, nonceStr, packageValue);
+      return String.format("%s\n%s\n%s\n%s\n", appId, timeStamp, nonceStr, packageValue);
     }
   }
 

weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/BusinessCircleServiceImpl.java

@@ -46,7 +46,7 @@ public void notifyPoints(PointsNotifyRequest request) throws WxPayException {
    * @return true:校验通过 false:校验不通过
    */
   private boolean verifyNotifySign(SignatureHeader header, String data) {
-    String beforeSign = String.format("%s%n%s%n%s%n", header.getTimeStamp(), header.getNonce(), data);
+    String beforeSign = String.format("%s\n%s\n%s\n", header.getTimeStamp(), header.getNonce(), data);
     return payService.getConfig().getVerifier().verify(header.getSerialNo(),
       beforeSign.getBytes(StandardCharsets.UTF_8), header.getSigned());
   }

weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/MarketingFavorServiceImpl.java

@@ -177,7 +177,7 @@ public FavorStocksStartResult restartFavorStocksV3(String stockId, FavorStocksSe
    * @return true:校验通过 false:校验不通过
    */
   private boolean verifyNotifySign(SignatureHeader header, String data) {
-    String beforeSign = String.format("%s%n%s%n%s%n", header.getTimeStamp(), header.getNonce(), data);
+    String beforeSign = String.format("%s\n%s\n%s\n", header.getTimeStamp(), header.getNonce(), data);
     return payService.getConfig().getVerifier().verify(header.getSerialNo(),
       beforeSign.getBytes(StandardCharsets.UTF_8), header.getSigned());
   }

weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/PayScoreServiceImpl.java

@@ -303,7 +303,7 @@ public WxPayScoreResult decryptNotifyDataResource(PayScoreNotifyData data) throw
    * @return true:校验通过 false:校验不通过
    */
   private boolean verifyNotifySign(SignatureHeader header, String data) {
-    String beforeSign = String.format("%s%n%s%n%s%n", header.getTimeStamp(), header.getNonce(), data);
+    String beforeSign = String.format("%s\n%s\n%s\n", header.getTimeStamp(), header.getNonce(), data);
     return payService.getConfig().getVerifier().verify(header.getSerialNo(),
       beforeSign.getBytes(StandardCharsets.UTF_8), header.getSigned());
   }