修复模板消息的MsgID的问题 #165

Author: binarywang

weixin-java-mp/src/main/java/me/chanjar/weixin/mp/util/xml/XStreamTransformer.java

@@ -49,18 +49,23 @@ public static <T> String toXml(Class<T> clazz, T object) {
    * @param clz     类型
    * @param xStream xml解析器
    */
-  public static void register(Class<?> clz, XStream xStream) {
+  private static void register(Class<?> clz, XStream xStream) {
     CLASS_2_XSTREAM_INSTANCE.put(clz, xStream);
   }
 
   /**
    * 会自动注册该类及其子类
    * @param clz 要注册的类
    */
-  public static void registerClass(Class<?> clz) {
+  private static void registerClass(Class<?> clz) {
     XStream xstream = XStreamInitializer.getInstance();
     xstream.processAnnotations(clz);
     xstream.processAnnotations(getInnerClasses(clz));
+    if(clz.equals(WxMpXmlMessage.class)){
+      // 操蛋的微信，模板消息推送成功的消息是MsgID，其他消息推送过来是MsgId
+      xstream.aliasField("MsgID", WxMpXmlMessage.class, "msgId");
+    }
+
     register(clz, xstream);
   }