简单工厂模式实战
简单电视机工厂
某电视机厂专为各知名电视机品牌代工生产各类电视机,当需要海尔牌电视机时只需要在调用该工厂的工厂方法时传入参数“Haier”,需要海信电视机时只需要传入参数“Hisense”,工厂可以根据传入的不同参数返回不同品牌的电视机。现使用简单工厂模式来模拟该电视机工厂的生产过程。
类图:
代码:
TV接口:
public interface TV
{public void play();
}
HaierTV类:
public class HaierTV implements TV
{public void play(){System.out.println("海尔电视机播放中......");}
}
HisenseTV类:
public class HisenseTV implements TV
{public void play(){System.out.println("海信电视机播放中......");}
}
TV工厂类:
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,暂时没有该品牌电视机!");}}
}
客户类:
public class Client
{public static void main(String args[]) throws Exception {TV tv;tv=TVFactory.produceTV("Haier");tv.play();}
}
运行结果:
工厂方法模式实战
电视机工厂
将原有的工厂进行分割,为每种品牌的电视机提供一个子工厂,海尔工厂专门负责生产海尔电视机,海信工厂专门负责生产海信电视机,如果需要生产TCL电视机或创维电视机,只需要对应增加一个新的TCL工厂或创维工厂即可,原有的工厂无须做任何修改,使得整个系统具有更加的灵活性和可扩展性。
类图:
代码:
代码结构
TV接口
public interface TV
{public void play();
}
HaierTV类
public class HaierTV implements TV
{public void play(){System.out.println("海尔电视机播放中......");}
}
HisenseTV类
public class HisenseTV implements TV
{public void play(){System.out.println("海信电视机播放中......");}
}
TV工厂类
public interface TVFactory
{public TV produceTV();
}
HaierTVFactory类
public class HaierTVFactory implements TVFactory
{public TV produceTV(){System.out.println("电视机工厂生产海尔电视机!");return new HaierTV();}
}
HisenseTVFactory类
public class HisenseTVFactory implements TVFactory
{public TV produceTV(){System.out.println("电视机工厂生产海信电视机!");return new HisenseTV();}
}
config.xml文件
<?xml version="1.0"?>
<config><className>HisenseTVFactory</className>
</config>
XMLUtil工具类
public class XMLUtil
{public static Object getBean(){try{//创建DOM文件对象DocumentBuilderFactory dFactory = DocumentBuilderFactory.newInstance();DocumentBuilder builder = dFactory.newDocumentBuilder();Document doc; doc = builder.parse(new File("config.xml")); //获得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;}}
}
客户类
public class Client
{public static void main(String args[]){try{TV tv;TVFactory factory;factory=(TVFactory)XMLUtil.getBean();tv=factory.produceTV();tv.play();}catch(Exception e){System.out.println(e.getMessage());}}
}
运行结果
抽象工厂模式实战
电器工厂
一个电器工厂可以产生多种类型的电器,如海尔工厂可以生产海尔电视机、海尔空调等,TCL工厂可以生产TCL电视机、TCL空调等,相同品牌的电器构成一个产品族,而相同类型的电器构成了一个产品等级结构,现使用抽象工厂模式模拟该场景。
类图:
代码
代码结构
Television接口
public interface Television
{public void play();
}
HaierTelevision类
public class HaierTelevision implements Television
{public void play(){System.out.println("海尔电视机播放中......");}
}
TCLTelevision类
public class TCLTelevision implements Television
{public void play(){System.out.println("TCL电视机播放中......");}
}
AirConditioner接口
public interface AirConditioner
{public void changeTemperature();
}
HairAirConditioner类
public class HairAirConditioner implements AirConditioner
{public void changeTemperature(){System.out.println("海尔空调温度改变中......");}
}
TCLAirConditioner类
public class TCLAirConditioner implements AirConditioner
{public void changeTemperature(){System.out.println("TCL空调温度改变中......");}
}
EFactory接口
public interface EFactory
{public Television produceTelevision();public AirConditioner produceAirConditioner();
}
HaierFactory类
public class HaierFactory implements EFactory
{public Television produceTelevision(){return new HaierTelevision();}public AirConditioner produceAirConditioner(){return new HairAirConditioner();}
}
public class TCLFactory implements EFactory
{public Television produceTelevision(){return new TCLTelevision();}public AirConditioner produceAirConditioner(){return new TCLAirConditioner();}
}
XMLUtil类
public class XMLUtil
{public static Object getBean(){try{DocumentBuilderFactory dFactory = DocumentBuilderFactory.newInstance();DocumentBuilder builder = dFactory.newDocumentBuilder();Document doc; doc = builder.parse(new File("config.xml"));NodeList nl = doc.getElementsByTagName("className");Node classNode=nl.item(0).getFirstChild();String cName=classNode.getNodeValue();Class c=Class.forName(cName);Object obj=c.newInstance();return obj;} catch(Exception e){e.printStackTrace();return null;}}
}
config.xml文件
<?xml version="1.0"?>
<config><className>HaierFactory</className>
</config>
客户类
import com.song.airConditioner.AirConditioner;
import com.song.television.Television;
import com.song.util.XMLUtil;public class Client
{public static void main(String args[]){try{EFactory factory;Television tv;AirConditioner ac;factory=(EFactory) XMLUtil.getBean();tv=factory.produceTelevision();tv.play();ac=factory.produceAirConditioner();ac.changeTemperature();}catch(Exception e){System.out.println(e.getMessage());}}
}
运行结果
求关注,求关注,求关注!!!
可以直接问我要代码