feat(组合模式）：create

java/com/kongxiang/raindrop/dp/type/structure/composite/Client.java

+package com.kongxiang.raindrop.dp.type.structure.composite;
+
+/**
+ * @author 孔翔
+ * @since 2023-10-23
+ * copyright for author : 孔翔 at 2023-10-23
+ * dp
+ */
+public class Client {
+    public static void main(String[] args) {
+        Leaf leaf = new Leaf("张三”");
+        Leaf leaf1 = new Leaf("张4”");
+        Leaf leaf2 = new Leaf("张5”");
+        Leaf leaf3 = new Leaf("张6”");
+        Leaf leaf4 = new Leaf("张7”");
+
+        Composite composite = new Composite("组1");
+        composite.add(leaf);
+        composite.add(leaf1);
+        Composite composite2 = new Composite("组2");
+        composite2.add(leaf2);
+        composite2.add(leaf3);
+        Composite composite3 = new Composite("组3");
+        composite3.add(leaf4);
+
+        composite.add(composite2);
+        composite2.add(composite3);
+
+        composite.draw();
+
+    }
+}

java/com/kongxiang/raindrop/dp/type/structure/composite/Component.java

+package com.kongxiang.raindrop.dp.type.structure.composite;
+
+/**
+ * @author 孔翔
+ * @since 2023-10-23
+ * copyright for author : 孔翔 at 2023-10-23
+ * dp
+ */
+public abstract class Component {
+  protected  String name;
+  public Component(String name){
+    this.name = name;
+  }
+
+  public abstract void draw();
+
+  public abstract void add(Component component);
+
+  public abstract void remove(Component component);
+
+}

java/com/kongxiang/raindrop/dp/type/structure/composite/Composite.java

+package com.kongxiang.raindrop.dp.type.structure.composite;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @author 孔翔
+ * @since 2023-10-23
+ * copyright for author : 孔翔 at 2023-10-23
+ * dp
+ */
+public class Composite extends Component {
+    private List<Component> componentList = new ArrayList<>();
+
+    public Composite(String name) {
+        super(name);
+    }
+
+    @Override
+    public void draw() {
+        for (Component com :
+                componentList) {
+            com.draw();
+        }
+    }
+
+    @Override
+    public void add(Component component) {
+        this.componentList.add(component);
+    }
+
+    @Override
+    public void remove(Component component) {
+        this.componentList.remove(component);
+    }
+}

java/com/kongxiang/raindrop/dp/type/structure/composite/Leaf.java

+package com.kongxiang.raindrop.dp.type.structure.composite;
+
+/**
+ * @author 孔翔
+ * @since 2023-10-23
+ * copyright for author : 孔翔 at 2023-10-23
+ * dp
+ */
+public class Leaf extends Component {
+
+    public Leaf(String name) {
+        super(name);
+    }
+
+    @Override
+    public void draw() {
+        System.out.println(this.name);
+    }
+
+    @Override
+    public void add(Component component) {
+        throw new IllegalArgumentException("叶节点不能添加组件");
+    }
+
+    @Override
+    public void remove(Component component) {
+        throw new IllegalArgumentException("叶节点不能移除组件");
+    }
+}