【java设计模式】【行为模式Behavioral Pattern】策略模式Strategy Pattern

package com.tn.策略模式;

public class Client {
    private Strategy strategy;
    public void setStrategy(Strategy strategy){
        this.strategy=strategy;
    }
    public void exeAlgorithm() {
        strategy.exeAlgorithm();
    }
    
    public static void main(String[]args){
        Strategy strategy1=new ConcreteStrategy1();
        Strategy strategy2=new ConcreteStrategy2();
        Strategy strategy3=new ConcreteStrategy3();
        
        Client c=new Client();
        
        c.setStrategy(strategy1);
        c.exeAlgorithm();
        
        c.setStrategy(strategy2);
        c.exeAlgorithm();
        
        c.setStrategy(strategy3);
        c.exeAlgorithm();
    }
}
interface Strategy{
    void exeAlgorithm();
}
class ConcreteStrategy1 implements Strategy{
    @Override
    public void exeAlgorithm() {
        System.out.println("执行算法1……");
    }
}
class ConcreteStrategy2 implements Strategy{
    @Override
    public void exeAlgorithm() {
        System.out.println("执行算法2……");
    }
}
class ConcreteStrategy3 implements Strategy{
    @Override
    public void exeAlgorithm() {
        System.out.println("执行算法3……");
    }
}