Java 设计模式 之 策略模式

http://www.verejava.com/?id=16999166513476

package com.strategy.theory;

public class TestStrategy
{
    public static void main(String[] args)
    {
        Context ctx=new Context(new StrategyImplA());
        ctx.doMethod();
        
        ctx=new Context(new StrategyImplB());
        ctx.doMethod();
        
        ctx=new Context(new StrategyImplC());
        ctx.doMethod();
    }
}





package com.strategy.theory;

public class Context
{
    private Strategy strategy;
    
    public Context(Strategy strategy)
    {
        this.strategy=strategy;
    }
    
    public void doMethod()
    {
        strategy.method();
    }
}





package com.strategy.theory;

public abstract class Strategy
{
    public abstract void method();
}





package com.strategy.theory;

public class StrategyImplA extends Strategy
{

    @Override
    public void method()
    {
        System.out.println("方法实现 A");
        
    }

}





package com.strategy.theory;

public class StrategyImplB extends Strategy
{

    @Override
    public void method()
    {
        System.out.println("方法实现 B");
        
    }

}






package com.strategy.theory;

public class StrategyImplC extends Strategy
{

    @Override
    public void method()
    {
        System.out.println("方法实现 C");
        
    }

}

http://www.verejava.com/?id=16999166513476