设计模式——策略模式

布满荆棘的人生 2022-12-29 00:16 29阅读 0赞

## 设计模式——策略模式 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk0NTQ3MQ_size_16_color_FFFFFF_t_70]  
策略模式（Strategy）:它定义了算法家族，分别封装起来，让它们之间可以互相替换，此模式让算法的变化，不会影响到使用算法的客户

//抽象算法类
        abstract class Strategy
        {
        
            //算法方法
            public abstract void AlgorithmInterface();
        }
        //具体算法A
        class ConcreteStrategyA : Strategy
        {
        
            //算法A实现方法
            public override void AlgorithmInterface()
            {
        
                Console.WriteLine("算法A");
            }
        }
        //具体算法B
        class ConcreteStrategyB : Strategy
        {
        
            //算法B实现方法
            public override void AlgorithmInterface()
            {
        
                Console.WriteLine("算法B");
            }
        }
        //具体算法C
        class ConcreteStrategyC : Strategy
        {
        
            //算法C实现方法
            public override void AlgorithmInterface()
            {
        
                Console.WriteLine("算法C");
            }
        }
    
        //上下文
        class Context
        {
        
            Strategy strategy;
            public Context(Strategy strategy)
            {
        
                this.strategy = strategy;
            }
    
            //上下文接口
            public void ContextInterface()
            {
        
                this.strategy.AlgorithmInterface();
            }
        }
    
            static void Main(string[] args)
            {
        
                Context context;
                context = new Context(new ConcreteStrategyA());
                context.ContextInterface();
                context = new Context(new ConcreteStrategyB());
                context.ContextInterface();
                context = new Context(new ConcreteStrategyC());
                context.ContextInterface();
            }

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk0NTQ3MQ_size_16_color_FFFFFF_t_70]: /images/20221120/b3c3e5b528a844d283eae743cab855ba.png