开发门户网站2021年关键词排名

实验4：抽象工厂模式

本次实验属于模仿型实验，通过本次实验学生将掌握以下内容：

1、理解抽象工厂模式的动机，掌握该模式的结构；

2、能够利用抽象工厂模式解决实际问题。

[实验任务]：人与肤色

使用抽象工厂模式，完成下述产品等级结构：

类图

运行效果

源代码

public class BlackFactory implements PeopleFactory
{@Overridepublic Man produceMan(){return new BlackMan();}@Overridepublic Woman produceWoman(){return new BlackWoman();}
}public class BlackMan implements Man
{@Overridepublic void show(){System.out.println("一个黑种男人");}
}public class BlackWoman implements Woman
{@Overridepublic void show(){System.out.println("一个黑种女人");}
}public class Client
{public static void main(String[] args){try{PeopleFactory factory;Man man;Woman woman;//根据xml配置文件动态实例对象factory = (PeopleFactory) XMLUtil.getBean();man = factory.produceMan();man.show();woman = factory.produceWoman();woman.show();}catch (Exception e){System.out.println(e.getMessage());}}
}public interface Man
{void show();
}public interface PeopleFactory
{Man produceMan();Woman produceWoman();
}public class WhiteFactory implements PeopleFactory
{@Overridepublic Man produceMan(){return new WhiteMan();}@Overridepublic Woman produceWoman(){return new WhiteWoman();}
}public class WhiteMan implements Man
{@Overridepublic void show(){System.out.println("一个白种男人");}
}public class WhiteWoman implements Woman
{@Overridepublic void show(){System.out.println("一个白种女人");}
}public interface Woman
{void show();
}import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import java.io.File;public class XMLUtil
{public static Object getBean(){try{//创建DOM文档对象DocumentBuilderFactory dFactory = DocumentBuilderFactory.newInstance();DocumentBuilder builder = dFactory.newDocumentBuilder();Document doc = builder.parse(new File("src/main/resources/config4.xml"));//获取包含类名的文本节点NodeList nl = doc.getElementsByTagName("className");Node classNode = nl.item(0).getFirstChild();String cName = classNode.getNodeValue();//通过类名生成实例对象并将其返回Class c = Class.forName(cName);Object obj = c.newInstance();return obj;}catch (Exception e){e.printStackTrace();return null;}}
}public class YellowFactory implements PeopleFactory
{@Overridepublic Man produceMan(){return new YellowMan();}@Overridepublic Woman produceWoman(){return new YellowWoman();}
}public class YellowMan implements Man
{@Overridepublic void show(){System.out.println("一个黄种男人");}
}public class YellowWoman implements Woman
{@Overridepublic void show(){System.out.println("一个黄种女人");}
}

config4.xml

<?xml version="1.0" encoding="UTF-8"?>
<config><className>Tutorial_4.YellowFactory</className>
</config>