组合模式 CompositePattern

最新推荐文章于 2025-09-15 18:11:21 发布

最新推荐文章于 2025-09-15 18:11:21 发布 · 69 阅读

本文介绍了一个使用复合模式的具体实例，展示了如何通过抽象基类和具体实现来构建灵活的树形结构。通过创建不同类型的节点（如分支节点和叶节点），可以方便地管理和操作这些节点，实现了节点的增删查等功能。

using System; using System.Collections; class Node { private string _Name; private string _Description; public Node(string name, string description) { _Name = name; _Description = description; } public string Name { get { return _Name; } } public string Description { get { return _Description; } } public virtual void addNode(Node node) { throw new Exception("未提供该功能"); } public virtual void removeNode(Node node) { throw new Exception("未提供该功能"); } public virtual void printInformation() { throw new Exception("未提供该功能"); } public virtual ArrayList getChildNodes() { throw new Exception("未提供该功能"); } public virtual NodeIterator createNodeIterator() { throw new Exception("未提供该功能"); } }

节点的抽象

using System; class Leef : Node { public Leef(string name, string description) : base(name, description) { } public override void printInformation() { Console.WriteLine("Leef-Name-" + base.Name + "-Description-" + base.Description); } }

节点抽象的实现A

using System; using System.Collections; class NodeElement : Node { private ArrayList _NodeList; public NodeElement(string name, string description) : base(name, description) { _NodeList = new ArrayList(); } public override ArrayList getChildNodes() { return _NodeList; } public override void addNode(Node node) { _NodeList.Add(node); } public override void removeNode(Node node) { foreach (Node n in _NodeList) { if (n.Name == node.Name && n.Description == n.Description) _NodeList.Remove(n); } } public override void printInformation() { foreach (Node n in _NodeList) { n.printInformation(); } } }

节点抽象的实现B

using System; using System.Collections.Generic; using System.Text; namespace CompositePattern { class Program { static void Main(string[] args) { Node root = new NodeElement("节点", "根节点"); Node em1 = new NodeElement("节点", "节点1"); Node em2 = new NodeElement("节点", "节点2"); Node leef1 = new Leef("叶子", "叶子1"); Node leef2 = new Leef("叶子", "叶子2"); Node leef3 = new Leef("叶子", "叶子3"); Node leef4 = new Leef("叶子", "叶子4"); Node leef5 = new Leef("叶子", "叶子5"); Node leef6 = new Leef("叶子", "叶子6"); root.addNode(em1); root.addNode(em2); em1.addNode(leef1); em1.addNode(leef2); em1.addNode(leef3); em2.addNode(leef4); em2.addNode(leef5); em2.addNode(leef6); root.printInformation(); Console.ReadKey(); } } }

调用代码