:art: 优化微信支付异常处理代码，兼容混乱且变态的微信官方字段命名习惯

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

@@ -59,12 +59,19 @@ public abstract class BaseWxPayResult {
    */
   @XStreamAlias("result_code")
   private String resultCode;
+
   /**
    * 错误代码.
    */
   @XStreamAlias("err_code")
   private String errCode;
   /**
+   * 错误代码描述.
+   */
+  @XStreamAlias("err_code_des")
+  private String errCodeDes;
+
+  /**
    * 错误代码.
    */
   @XStreamAlias("error_code")
@@ -72,8 +79,9 @@ public abstract class BaseWxPayResult {
   /**
    * 错误代码描述.
    */
-  @XStreamAlias("err_code_des")
-  private String errCodeDes;
+  @XStreamAlias("error_message")
+  private String errorMessage;
+
   /**
    * 公众账号ID.
    */

weixin-java-pay/src/main/java/com/github/binarywang/wxpay/exception/WxPayException.java

@@ -89,7 +89,7 @@ public class WxPayException extends Exception {
    * @return the wx pay exception
    */
   public static WxPayException from(BaseWxPayResult payBaseResult) {
-    return WxPayException.newBuilder()
+    WxPayException exception = WxPayException.newBuilder()
       .xmlString(payBaseResult.getXmlString())
       .returnMsg(payBaseResult.getReturnMsg())
       .returnCode(payBaseResult.getReturnCode())
@@ -97,6 +97,16 @@ public class WxPayException extends Exception {
       .errCode(payBaseResult.getErrCode())
       .errCodeDes(payBaseResult.getErrCodeDes())
       .build();
+
+    if (payBaseResult.getErrorCode() != null) {
+      exception.setErrCode(payBaseResult.getErrorCode());
+    }
+
+    if (payBaseResult.getErrorMessage() != null) {
+      exception.setErrCodeDes(payBaseResult.getErrorMessage());
+    }
+
+    return exception;
   }
 
   /**