Java design Mode Gof Factory mode

First, the factory model (Factory)

1. The separation of creators and callers is realized.

2. Application Scenario
①jdk in the Calendar of getinstance ();
Acquisition of the Connection object of ②JDBC;
③hibernate sessionfactory to create a Session object;
④spring the IOC container to create the management Bean object;
⑤xml Parse Documentbuilderfactory create parser object;
⑥ the newinstance () of the Class object in the reflection.

3. Classification:
① Simple Factory mode (also known as static Factory mode, often used)
1, used to produce the same hierarchical structure of any product;
2, for the new product, you need to modify the existing code.
3, do not meet the opening and closing principle (open to expansion, the modification is closed)

② Factory Method mode
1, used for the production of fixed products in the same grade structure;
2, support to increase any product.

③ Abstract Factory mode
1, for the production of different product families of all products;
2, the addition of new products (one), powerless;
3, support to increase the product

Second, the factory model code implementation

1. Simple Factory mode

1.1. Interface of simple Factory mode product: Car.java

Package Cn.com.zfc.gof01.factory.simplefactoy;

/**
*
* @title Car
* @describe Simple Factory mode product interface Car
* @author Zhang Fuchang
* @date April 4, 2017 8:44:42
*/
Public interface Car {
public abstract void run ();

}

1.2, simple Factory mode product interface Car implementation class: Audi.java

Package Cn.com.zfc.gof01.factory.simplefactoy;

/**
*
* @title Audi
* @describe Simple Factory mode product interface Car implementation class: Audi.java
* @author Zhang Fuchang
* @date April 4, 2017 8:45:48
*/
public class Audi implements Car {

@Override
public void Run () {
System.out.println ("Audi is driving");
}

}

1.3, simple Factory mode product interface Car implementation class: Benz.java

Package Cn.com.zfc.gof01.factory.simplefactoy;

/**
*
* @title Benz
* @describe Simple Factory mode product interface Car implementation class: Benz.java
* @author Zhang Fuchang
* @date April 4, 2017 8:45:48
*/
public class Benz implements Car {

@Override
public void Run () {
System.out.println ("Mercedes-Benz in the drive");
}

}

1.4, Simple Factory mode product interface Car implementation class: Bmw.java

Package Cn.com.zfc.gof01.factory.simplefactoy;

/**
*
* @title BMW
* @describe Simple Factory mode product interface Car implementation class BMW
* @author Zhang Fuchang
* @date April 4, 2017 8:45:48
*/
public class BMW implements Car {

@Override
public void Run () {
System.out.println ("BMW is driving");
}

}

1.5. Factory type of simple Factory mode: Carfactory.java

Package Cn.com.zfc.gof01.factory.simplefactoy;

/**
*
* @title Carfactory
* @describe Simple Factory, general use of static method
* @author Zhang Fuchang
* @date April 4, 2017 8:50:08
*/
public class Carfactory {

Get examples of BMW
public static Car GETBMW () {
return new BMW ();
}

Get an instance of Benz
public static Car Getbenz () {
return new Benz ();
}

Get an example of Audi
public static Car Getaudi () {
return new Audi ();
}

}

1.6, testing without factory class premise, the creation of Audi, Benz, Bmw:TestNoFactory.java

Package cn.com.zfc.gof01.factory.simplefactoy.test;

Import Cn.com.zfc.gof01.factory.simplefactoy.Audi;
Import Cn.com.zfc.gof01.factory.simplefactoy.Benz;
Import CN.COM.ZFC.GOF01.FACTORY.SIMPLEFACTOY.BMW;
Import Cn.com.zfc.gof01.factory.simplefactoy.Car;

/**
*
* @title Testnofactory
* @describe no factory class, create Audi, Benz, BMW
* @author Zhang Fuchang
* @date April 4, 2017 8:52:37
*/
public class Testnofactory {
public static void Main (string[] args) {
Need to know the interface and its implementation class
Car C1 = new Audi ();
Car C2 = new Benz ();
Car C3 = New BMW ();
C1.run ();
C2.run ();
C3.run ();
}

}

1.7, the test in the factory class premise, the creation of Audi, Benz, Bmw:TestSimpleFactory.java

Package cn.com.zfc.gof01.factory.simplefactoy.test;

Import Cn.com.zfc.gof01.factory.simplefactoy.Car;
Import Cn.com.zfc.gof01.factory.simplefactoy.CarFactory;

/**
*
* @title Testsimplefactory
* @describe Test Simple Factory mode with factory class to create Audi, Benz, BMW
* @author Zhang Fuchang
* @date April 4, 2017 8:56:39
*/
public class Testsimplefactory {
public static void Main (string[] args) {
Need to know the interfaces and factory classes
Car C1 = Carfactory.getaudi ();
Car C2 = Carfactory.getbenz ();
Car C3 = CARFACTORY.GETBMW ();
C1.run ();
C2.run ();
C3.run ();
}
}

2, factory method mode

2.1. Interface of simple Factory mode product: Car.java

Package Cn.com.zfc.gof01.factory.factorymethod;

/**
*
* @title Car
* @describe Simple Factory mode product interface Car
* @author Zhang Fuchang
* @date April 4, 2017 8:44:42
*/
Public interface Car {
public abstract void run ();
}

2.2, factory method mode product Interface Car implementation class: Audi.java

Package Cn.com.zfc.gof01.factory.factorymethod;

/**
*
* @title Audi
* @describe Factory Method Mode Product Interface Car Realization Class Audi
* @author Zhang Fuchang
* @date April 4, 2017 8:45:48
*/
public class Audi implements Car {

@Override
public void Run () {
System.out.println ("Audi is driving");
}

}

2.3, the factory method mode product Interface Car implementation class Benz

Package Cn.com.zfc.gof01.factory.factorymethod;

/**
*
* @title Benz
* @describe Factory Method Mode product Interface Car implementation class: Benz.java
* @author Zhang Fuchang
* @date April 4, 2017 8:45:48
*/
public class Benz implements Car {

@Override
public void Run () {
System.out.println ("Mercedes-Benz in the drive");
}

}

2.4, factory method mode product Interface Car implementation class: Bmw.java

Package Cn.com.zfc.gof01.factory.factorymethod;

/**
*
* @title BMW
* @describe Factory Method Mode product Interface Car implementation class BMW
* @author Zhang Fuchang
* @date April 4, 2017 8:45:48
*/
public class BMW implements Car {

@Override
public void Run () {
System.out.println ("BMW is driving");
}

}

2.5 Factory interface of factory method mode: Carfactory.java

Package Cn.com.zfc.gof01.factory.factorymethod;

/**
*
* @title Carfactory
* Factory Interface for @describe factory method mode Carfactory
* @author Zhang Fuchang
* @date April 4, 2017 9:05:18
*/
Public interface Carfactory {
Car Getcar ();
}

2.6, factory method mode factory class, need to implement the factory interface: Audifactory. java

Package Cn.com.zfc.gof01.factory.factorymethod;

/**
*
* @title Audifactory
* Factory class @describe factory method mode, need to implement factory interface
* @author Zhang Fuchang
* @date April 4, 2017 9:07:08
*/
public class Audifactory implements Carfactory {

@Override
Public Car Getcar () {
return new Audi ();
}

}

2.7, factory method mode factory class, need to implement the factory interface: Benzfactory. java

Package Cn.com.zfc.gof01.factory.factorymethod;

/**
*
* @title Benzfactory
* Factory class @describe factory method mode, need to implement factory interface
* @author Zhang Fuchang
* @date April 4, 2017 9:07:08
*/
public class Benzfactory implements Carfactory {

@Override
Public Car Getcar () {
return new Benz ();
}

}

2.8, factory method mode factory class, need to implement the factory interface: Carfactory. java

Package Cn.com.zfc.gof01.factory.factorymethod;

/**
*
* @title Bmwfactory
* Factory class @describe factory method mode, need to implement factory interface
* @author Zhang Fuchang
* @date April 4, 2017 9:07:08
*/
public class Bmwfactory implements Carfactory {

@Override
Public Car Getcar () {
return new BMW ();
}

}

2.9. Test Factory method Mode: Testfactorymethod.java

Package cn.com.zfc.gof01.factory.factorymethod.test;

Import Cn.com.zfc.gof01.factory.factorymethod.AudiFactory;
Import Cn.com.zfc.gof01.factory.factorymethod.BenzFactory;
Import Cn.com.zfc.gof01.factory.factorymethod.BmwFactory;
Import Cn.com.zfc.gof01.factory.factorymethod.Car;

/**
*
* @title Testfactorymethod
* @describe Test Factory method mode
* @author Zhang Fuchang
* @date April 4, 2017 9:09:34
*/
public class Testfactorymethod {
public static void Main (string[] args) {
Need to know the interfaces and their respective factory classes
Car C1 = new Audifactory (). Getcar ();
Car C2 = new Benzfactory (). Getcar ();
Car C3 = New Bmwfactory (). Getcar ();
C1.run ();
C2.run ();
C3.run ();
}
}

3. Abstract Factory mode

3.1, the product interface of the abstract factory, Engine: Engine.java

Package cn.com.zfc.gof01.factory.abstractfactory;

/**
*
* @title Engine
* @describe the product interface of the abstract factory, engine
* @author Zhang Fuchang
* @date April 4, 2017 9:27:21
*/
Public interface Engine {
Engine efficiency
void efficiency ();
}

3.2, abstract interface of the product interface, SEAT: Seat.java

Package cn.com.zfc.gof01.factory.abstractfactory;

/**
*
* @title Seat
* @describe Abstract interface of the product interface, seat
* @author Zhang Fuchang
* @date April 4, 2017 9:38:21
*/
Public interface Seat {
Comfortable seating
void Comfort ();

}

3.3, the product interface of the abstract factory, tyre: Tyre.java

Package cn.com.zfc.gof01.factory.abstractfactory;

/**
*
* @title Tyre
* @describe the product interface of the abstract factory, tyre
* @author Zhang Fuchang
* @date April 4, 2017 9:39:06
*/
Public interface Tyre {
Tire Wear
void Wear ();
}

3.4, abstract factory model of product realization class, Low-end engine: Lowengine.java

Package cn.com.zfc.gof01.factory.abstractfactory;
/**
*
* @title Lowengine
* @describe Abstract Factory mode Product Realization class, low-end engine
* @author Zhang Fuchang
* @date April 4, 2017 9:55:02
*/
public class Lowengine implements Engine {

@Override
public void efficiency () {
SYSTEM.OUT.PRINTLN ("Low-end engine efficiency");
}

}

3.5, abstract factory model of product realization class, High-end engine: Luxuryengine.java

Package cn.com.zfc.gof01.factory.abstractfactory;

/**
*
* @title Luxuryengine
* @describe Abstract Factory mode product Realization class, high-end engine
* @author Zhang Fuchang
* @date April 4, 2017 9:48:05
*/
public class Luxuryengine implements Engine {

@Override
public void efficiency () {
System.out.println ("High-end engine efficiency");
}

}

3.6, abstract factory model of product realization class, Low-end seat: Lowseat.java

Package cn.com.zfc.gof01.factory.abstractfactory;

/**
*
* @title Lowseat
* @describe Abstract Factory mode Product Realization class, low-end seat
* @author Zhang Fuchang
* @date April 4, 2017 9:55:32
*/
public class Lowseat implements Seat {

@Override
public void Comfort () {
SYSTEM.OUT.PRINTLN ("Low-end seat comfort");
}

}

3.7, abstract factory model of product realization class, High-end seat: Luxuryseat.java

Package cn.com.zfc.gof01.factory.abstractfactory;
/**
*
* @title Luxuryseat
* @describe Abstract Factory Model product realization class, high-end seating
* @author Zhang Fuchang
* @date April 4, 2017 9:55:49
*/
public class Luxuryseat implements Seat {

@Override
public void Comfort () {
System.out.println ("High-end seat comfort");
}

}

3.8, abstract factory model of product realization class, Low-end tires: Lowtyre.java

Package cn.com.zfc.gof01.factory.abstractfactory;
/**
*
* @title Lowtyre
* @describe Abstract Factory mode Product Realization class, low-end tires
* @author Zhang Fuchang
* @date April 4, 2017 9:55:40
*/
public class Lowtyre implements Tyre {

@Override
public void Wear () {
SYSTEM.OUT.PRINTLN ("Low-end tires are easy to wear");
}

}

3.9, abstract factory model of product realization class, High-end tires: Luxurytyre.java

Package cn.com.zfc.gof01.factory.abstractfactory;
/**
*
* @title Luxurytyre
* @describe Abstract Factory model of product realization class, high-end tires
* @author Zhang Fuchang
* @date April 4, 2017 9:55:55
*/
public class Luxurytyre implements Tyre {

@Override
public void Wear () {
System.out.println ("High-end tires are not easy to wear");
}

}

3.10, abstract Factory product Family Factory interface: Carfactory.java

Package cn.com.zfc.gof01.factory.abstractfactory;

/**
*
* @title Carfactory
* Product Family Factory Interface @describe Abstract Factory
* @author Zhang Fuchang
* @date April 4, 2017 9:54:28
*/
Public interface Carfactory {
Engine Getengine ();

Seat getseat ();

Tyre Gettyre ();
}

3.11, abstract factory product Family Factory Interface Realization class, Low-end factory: Lowcarfactory.java

Package cn.com.zfc.gof01.factory.abstractfactory;

/**
*
* @title Lowcarfactory
* @describe Abstract Factory Product Family factory interface implementation class, low-end factory
* @author Zhang Fuchang
* @date April 4, 2017 10:07:40
*/
public class Lowcarfactory implements Carfactory {

@Override
Public Engine Getengine () {
return new Lowengine ();
}

@Override
Public Seat getseat () {
return new Lowseat ();
}

@Override
Public Tyre Gettyre () {
return new Lowtyre ();
}

}

3.12, abstract Factory product Family factory interface implementation class, High-end factory: Luxurycarfactory.java

Package cn.com.zfc.gof01.factory.abstractfactory;

/**
*
* @title Luxurycarfactory
* @describe the product family of the abstract Factory interface implementation class, high-end factory
* @author Zhang Fuchang
* @date April 4, 2017 9:59:38
*/
public class Luxurycarfactory implements Carfactory {

@Override
Public Engine Getengine () {
return new Luxuryengine ();
}

@Override
Public Seat getseat () {
return new Luxuryseat ();
}

@Override
Public Tyre Gettyre () {
return new Luxurytyre ();
}

}

3.13. Test the Abstract Factory mode: Testabstractfactory.java

Package cn.com.zfc.gof01.factory.abstractfactory.test;

Import Cn.com.zfc.gof01.factory.abstractfactory.CarFactory;
Import Cn.com.zfc.gof01.factory.abstractfactory.Engine;
Import Cn.com.zfc.gof01.factory.abstractfactory.LuxuryCarFactory;

/**
*
* @title Testabstractfactory
* @describe Test Abstract Factory mode
* @author Zhang Fuchang
* @date April 4, 2017 10:18:39
*/
public class Testabstractfactory {
public static void Main (string[] args) {
Carfactory carfactory = new Luxurycarfactory ();
Engine engine = Carfactory.getengine ();
Engine.efficiency ();
}
}

Java design Mode Gof Factory mode