企业微信回调接口配置

uas-office-qywx/src/main/java/com/usoftchina/uas/office/qywx/manage/service/QywxCallbackService.java

@@ -27,7 +27,7 @@ public class QywxCallbackService extends AbstractService {
             e.printStackTrace();
         }
 
-        return null;
+        return callBackStr;
     }
 
     public String callBack(String msgSignature, String timestamp, String nonce, String jsonMsg){