diff --git a/src/main/java/top/fjy8018/designpattern/pattern/structural/composite/CatalogComponent.java b/src/main/java/top/fjy8018/designpattern/pattern/structural/composite/CatalogComponent.java
index cc8a333..9858fec 100644
--- a/src/main/java/top/fjy8018/designpattern/pattern/structural/composite/CatalogComponent.java
+++ b/src/main/java/top/fjy8018/designpattern/pattern/structural/composite/CatalogComponent.java
@@ -1,8 +1,21 @@
 package top.fjy8018.designpattern.pattern.structural.composite;
 
+import java.awt.*;
+import java.util.Collection;
+import java.util.Map;
+
 /**
  * 课程抽象类
  * 抽象组件应当多加考虑，哪些参数需要，哪些不需要
+ * <p>
+ * JDK组合模式源码
+ * {@link java.awt.Container#add(Component)} 增加一个父类操作
+ * {@link java.util.HashMap#putAll(Map)}
+ * {@link java.util.ArrayList#addAll(Collection)}
+ * <p>
+ * Mybatis源码
+ * {@link org.apache.ibatis.scripting.xmltags.SqlNode} 公共接口
+ * 实现：{@link org.apache.ibatis.scripting.xmltags.MixedSqlNode}
  *
  * @author F嘉阳
  * @date 2020/2/28 16:19