设计模式一抽象工厂模式

概述
　　通过工厂创建的对象，彼此之间是有关联的，是需要相互匹配的，

　　而简单工厂并没有解决对象之间相互依赖匹配的问题

　　合理解决方案就是使用抽象工厂设计模式：提供一个创建一系列相关或者相互依赖的接口，
　　接口内部严格按照相关或相互依赖的对象关系创建，
　　切勿堆积其它没有用的方法或者无关联关系的方法

组成

AbstractFactory：抽象工厂，提供统一的接口工厂。

ConcreteFactory：具体工厂，用来创建具体的带有关联关系的实例产品

AbstractProduct：统一的产品接口

ConcreteProduct：具体产品

优点：解耦

缺点：不容易扩展

public class Client {
    public static void main(String[] args) {
        ConcreteFactory1 a = new ConcreteFactory1();
        CPUApi cpu = a.createCpu();
        MainBoardApi mainBoard = a.createMainBoard();
        cpu.calculate();
        mainBoard.installCpu();

    }
}


//CPU的模拟方法
public interface CPUApi {
    public void calculate();
}

//主板模拟方法
public interface MainBoardApi {
    public void installCpu();
}

//cpu实现
public class IntelCpu implements CPUApi {
    private int pins = 0;

    public IntelCpu(int pins) {
        // TODO Auto-generated constructor stub
        this.pins = pins;
    }

    @Override
    public void calculate() {
        // TODO Auto-generated method stub
        System.out.println("INTEL CPU 针脚数：" + pins);
    }
}

public class AMDCpu implements CPUApi {
    private int pins = 0;

    public AMDCpu(int pins) {
        // TODO Auto-generated constructor stub
        this.pins = pins;
    }

    @Override
    public void calculate() {
        // TODO Auto-generated method stub
        System.out.println("AMD CPU针脚数：" + pins);
    }
}

//主板实现
public class GAMainBoard implements MainBoardApi {
    private int cpuHoles = 0;

    public GAMainBoard(int cpuHoles) {
        // TODO Auto-generated constructor stub
        this.cpuHoles = cpuHoles;
    }

    @Override
    public void installCpu() {
        // TODO Auto-generated method stub
        System.out.println("GA MainBoard 插孔数：" + cpuHoles);
    }

}

public class MSIMainBoard implements MainBoardApi {
    private int cpuHoles = 0;

    public MSIMainBoard(int cpuHoles) {
        // TODO Auto-generated constructor stub
        this.cpuHoles = cpuHoles;
    }

    @Override
    public void installCpu() {
        // TODO Auto-generated method stub
        System.out.println("MSI MainBord 插孔数：" + cpuHoles);
    }

}

//抽象工厂
public interface AbstractFactory {
    public CPUApi createCpu();

    public MainBoardApi createMainBoard();
}

//抽象工厂具体实现
public class ConcreteFactory1 implements AbstractFactory {

    //两者之间有联系
    @Override
    public CPUApi createCpu() {
        // TODO Auto-generated method stub
        return new AMDCpu(1156);
    }

    @Override
    public MainBoardApi createMainBoard() {
        // TODO Auto-generated method stub
        return new MSIMainBoard(1156);
    }
}

public class ConcreteFactory2 implements AbstractFactory {

    //两者之间有联系
    @Override
    public CPUApi createCpu() {
        // TODO Auto-generated method stub
        return new AMDCpu(939);
    }

    @Override
    public MainBoardApi createMainBoard() {
        // TODO Auto-generated method stub
        return new MSIMainBoard(939);
    }

}