了解—https://blog.csdn.net/u013132035/article/details/80633755
https://www.cnblogs.com/toutou/p/4899388.html
public class TVFactory
{
public static TV produceTV(String brand) throws Exception
{
if(brand.equalsIgnoreCase("Haier"))
{
System.out.println("电视机工厂生产海尔电视机!");
return new HaierTV();
}
else if(brand.equalsIgnoreCase("Hisense"))
{
System.out.println("电视机工厂生产海信电视机!");
return new HisenseTV();
}
else
{
throw new Exception("对不起,暂不能生产该品牌电视机!");
}
}
}
public interface TV
{
public void play();
}
public class HaierTV implements TV
{
public void play()
{
System.out.println("海尔电视机播放中......");
}
}
public class HisenseTV implements TV
{
public void play()
{
System.out.println("海信电视机播放中......");
}
}
public class Client
{
public static void main(String args[])
{
try
{
TV tv;
String brandName=XMLUtilTV.getBrandName();
tv=TVFactory.produceTV(brandName);
tv.play();
}
catch(Exception e)
{
System.out.println(e.getMessage());
}
}
}
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("configTV.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;
}
}
}