前言

享元模式通过共享对象来减少内存使用和提高性能。

代码

public abstract class Flyweight
{public abstract void Control();
}public class ComputerFlyweight : Flyweight
{private string _operator;public ComputerFlyweight(string name){_operator = name;}public override void Control(){Console.WriteLine($"current computer operator is :{_operator}");}
}public class FlyweightFactory
{private Dictionary<string, Flyweight> flyweights = new Dictionary<string, Flyweight>();public Flyweight GetFlyweight(string key){if (flyweights.ContainsKey(key)){return flyweights[key];}else{Flyweight flyweight = new ComputerFlyweight(key);flyweights.Add(key,flyweight);return flyweight;}}
}/** 结构型模式：Structural Pattern* 享元模式：Flyweight Pattern*/internal class Program{static void Main(string[] args){FlyweightFactory factory = new FlyweightFactory();Flyweight  userA = factory.GetFlyweight("UserA");userA.Control();Flyweight userB = factory.GetFlyweight("UserB");userB.Control();Flyweight userC = factory.GetFlyweight("UserA");userC.Control();Console.ReadLine();}}

运行结果