设计模式--抽象工厂模式

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
{
    @Override
    public Man produceMan()
    {
        return new BlackMan();
    }

    @Override
    public Woman produceWoman()
    {
        return new BlackWoman();
    }
}


public class BlackMan implements Man
{
    @Override
    public void show()
    {
        System.out.println("一个黑种男人");
    }
}


public class BlackWoman implements Woman
{
    @Override
    public 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
{
    @Override
    public Man produceMan()
    {
        return new WhiteMan();
    }

    @Override
    public Woman produceWoman()
    {
        return new WhiteWoman();
    }
}

public class WhiteMan implements Man
{
    @Override
    public void show()
    {
        System.out.println("一个白种男人");
    }
}

public class WhiteWoman implements Woman
{
    @Override
    public 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
{
    @Override
    public Man produceMan()
    {
        return new YellowMan();
    }

    @Override
    public Woman produceWoman()
    {
        return new YellowWoman();
    }
}


public class YellowMan implements Man
{
    @Override
    public void show()
    {
        System.out.println("一个黄种男人");
    }
}


public class YellowWoman implements Woman
{
    @Override
    public 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>