diff --git a/weixin4j-server/src/main/java/com/foxinmy/weixin4j/response/BlankResponse.java b/weixin4j-server/src/main/java/com/foxinmy/weixin4j/response/BlankResponse.java
index 1a1c81af..7012725b 100644
--- a/weixin4j-server/src/main/java/com/foxinmy/weixin4j/response/BlankResponse.java
+++ b/weixin4j-server/src/main/java/com/foxinmy/weixin4j/response/BlankResponse.java
@@ -1,8 +1,8 @@
 package com.foxinmy.weixin4j.response;
 
 /**
- * 空白回复
- * 
+ * 空白回复(避免微信服务器重复推送消息)
+ *
  * @className BlankResponse
  * @author jinyu(foxinmy@gmail.com)
  * @date 2015年5月7日
diff --git a/weixin4j-server/src/main/java/com/foxinmy/weixin4j/response/SingleResponse.java b/weixin4j-server/src/main/java/com/foxinmy/weixin4j/response/SingleResponse.java
index 637a5dda..33a19ea2 100644
--- a/weixin4j-server/src/main/java/com/foxinmy/weixin4j/response/SingleResponse.java
+++ b/weixin4j-server/src/main/java/com/foxinmy/weixin4j/response/SingleResponse.java
@@ -2,7 +2,7 @@ package com.foxinmy.weixin4j.response;
 
 /**
  * 单一内容回复
- * 
+ *
  * @className SingleResponse
  * @author jinyu(foxinmy@gmail.com)
  * @date 2015年8月3日