23种设计模式之-----工厂方法模式（Method Factory pattern）

沿用女娃造人的故事：

我们把造人的炉子抽象一下，分成个来造，白色的炉子造白人，黑色的炉子造黑人，黄色的炉子造黄种人。

那么：

人的接口：

public interface Human {    //会说话    public void talk();    //会笑    public void laugh();    //会哭    public void cry();}

黄种人：

public class YellowHuman implements Human{    @Override    public void talk() {        System.out.println("黄种人会说话");    }    @Override    public void laugh() {        System.out.println("黄种人会笑！");    }    @Override    public void cry() {        System.out.println("黄宏人会哭！");    }}

白种人：

public class WhiteHuman implements Human{    @Override    public void talk() {        System.out.println("白种人会说话！");    }    @Override    public void laugh() {        System.out.println("白种人会笑！");    }    @Override    public void cry() {        System.out.println("白种人会哭！");    }}

黑种人：

public class BlockHuman implements Human{    @Override    public void talk() {        System.out.println("黑种人会说话！");    }    @Override    public void laugh() {        System.out.println("黑种人会笑！");    }    @Override    public void cry() {        System.out.println("黑种人会哭！");    }}

炉子：

public interface HumanFactory {    public Human createHuman();}

黄色的炉子：

public class YellowFactory implements HumanFactory {    @Override    public Human createHuman() {        return new YellowHuman();    }}

黑色的炉子：

public class BlockFactory implements HumanFactory {    @Override    public Human createHuman() {        return new BlockHuman();    }}

白色的炉子：

public class WhiteFactory implements HumanFactory {    @Override    public Human createHuman() {        return new WhiteHuman();    }}

女娲：

public class NvWa {    public static void main(String[] args) {        //先来一堆白人        System.out.println("白人来咯：");        WhiteFactory wf = new WhiteFactory();        Human whiteHuman = wf.createHuman();        whiteHuman.cry();        whiteHuman.laugh();        whiteHuman.talk();        //再来一堆黑人        System.out.println("黑人来咯：");        Human blockHuman = new BlockFactory().createHuman();        blockHuman.talk();        blockHuman.laugh();        blockHuman.cry();        //最后来一批黄种人        System.out.println("黄种人来咯：");        Human yellowHuman = new YellowFactory().createHuman();        yellowHuman.cry();        yellowHuman.laugh();        yellowHuman.talk();    }}

看造人结果：