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：