简单工厂模式01

女娲造人

使用简单工厂模式模拟女娲(Nvwa)造人(Person)，如果传入参数M，则返回一个Man对象，如果传入参数W，则返回一个Woman对象，如果传入参数R，则返回一个Robot对象。请用程序设计实现上述场景。

 （1）类图

（2）源代码：

 2.1 People.java
package AA;

public class people {
    public static void main(String [] args)
    {
         try
         {
             NvWa nvwa;
             String brandName=XMLUtilTV.getBrandName();
             nvwa=PeopleFactory.producePeople(brandName);
             nvwa.play();
         }
         catch(Exception e)
         {
             System.out.println(e.getMessage());
         }
    }

}
  2.2 NvWa.java
    package AA;

public interface NvWa {
    public void play();
}
2.3 XMLUtilTV.java
package AA;
import javax.xml.parsers.*;
import org.w3c.dom.*;
import org.xml.sax.SAXException;
import java.io.*;
public class XMLUtilTV {
      //该方法用于从XML配置文件中提取品牌名称，并返回该品牌名称
        public static String getBrandName()
        {
            try
            {
                //创建文档对象
                DocumentBuilderFactory dFactory = DocumentBuilderFactory.newInstance();
                DocumentBuilder builder = dFactory.newDocumentBuilder();
                Document doc;                            
                doc = builder.parse(new File("congfilePeople.xml")); 
            
                //获取包含品牌名称的文本节点
                NodeList nl = doc.getElementsByTagName("brandName");
                Node classNode=nl.item(0).getFirstChild();
                String brandName=classNode.getNodeValue().trim();
                return brandName;
               }   
                   catch(Exception e)
                   {
                       e.printStackTrace();
                       return null;
                   }
            }
}
2.4R.java

    package AA;

public class R implements NvWa {
    public void play()
    {
        System.out.println("机器人创造中......");
    }    

}

2.5W.java
    package AA;

public class W implements NvWa{
    public void play()
    {
        System.out.println("女人创造中......");
    }    
}

2.6M.java
   package AA;

public  class M implements NvWa
{
    public void play()
    {
        System.out.println("男人创造中......");
    }    
}

2.7PeopleFactory.java
package AA;

public class PeopleFactory {
    public static NvWa producePeople(String brand) throws Exception
    {
        if(brand.equalsIgnoreCase("M"))
        {
            System.out.println("女娲再创造男人！");
            return new M();
        }
        else if(brand.equalsIgnoreCase("W"))
        {
            System.out.println("女娲再创造女人！");
            return new W();
        }
        else if(brand.equalsIgnoreCase("R"))
        {
            System.out.println("女娲再创造机器人！");
            return new R();
        }
        else
        {
            throw new Exception("对不起，我还是一块泥巴！");
        }
    }

}