diff --git a/src/main/java/top/fjy8018/designpattern/pattern/structural/facade/GiftExchangeService.java b/src/main/java/top/fjy8018/designpattern/pattern/structural/facade/GiftExchangeService.java
index fd95f5c..9c44955 100644
--- a/src/main/java/top/fjy8018/designpattern/pattern/structural/facade/GiftExchangeService.java
+++ b/src/main/java/top/fjy8018/designpattern/pattern/structural/facade/GiftExchangeService.java
@@ -1,11 +1,21 @@
 package top.fjy8018.designpattern.pattern.structural.facade;
 
 import lombok.extern.slf4j.Slf4j;
+import org.apache.catalina.connector.Request;
+import org.apache.catalina.connector.RequestFacade;
 
 /**
  * 外观类——礼物兑换逻辑
  * <p>
  * 该服务定义了与各个子系统交互的逻辑，业务系统无需知道与内部子系统的交互逻辑，符合迪米特法则
+ * <p>
+ * 源码：
+ * {@link org.springframework.jdbc.support.JdbcUtils} 对数据库相关的操作进行封装
+ * {@link org.apache.ibatis.session.Configuration#newMetaObject(Object)} 对创建对象的方法进行封装
+ * {@link RequestFacade} 其定义了操作HTTPRequest的公用方法 {@link Request} 在Request中都用该外观类操作
+ * 其他类似逻辑：
+ * {@link org.apache.catalina.connector.ResponseFacade}
+ * {@link org.apache.catalina.session.StandardSessionFacade}
  *
  * @author F嘉阳
  * @date 2020/2/28 10:44