原廠模式（JAVA設計模式）

1.簡單原廠模式：我建立一個“上帝類”創造出所有的類。

2.Factory 方法模式：將工廠類進行抽象，建立不是類型的工廠類。

3.抽象原廠模式：建立一個抽象的工廠父類，適合一系列產品的建立。

1.簡單原廠模式

public interface Car {public void run();}

public class Bmw implements Car {public void run() {System.out.println("Bmw run()...");}}

public class Benz implements Car{public void run() {System.out.println("Benz run()...");}}

/** * 簡單工廠HelloWorld */public class SimpleFactory {public static Car createCar(String type) {if ("bmw".equals(type)) {return new Bmw();} else {return new Benz();}}public static void main(String[] args) {Car c = SimpleFactory.createCar("bmw");c.run();}}

2.Factory 方法模式

public interface Factory {public Car create();}

public class BmwFactory implements Factory{public Car create() {return new Bmw();}}

public class BenzFactory implements Factory {public Car create() {return new Benz();}}

public interface Car {public void run();}

public class Bmw implements Car{public void run() {System.out.println("Bmw run()...");}}

public class Benz implements Car {public void run() {System.out.println("Benz run()...");}}

public class Test {public static void main(String[] args) {Factory factory = new BenzFactory();//可以生產各種各樣的平治。Car c = factory.create();c.run();}}

3.抽象原廠模式

public abstract class AbstractFactory {abstract Button createButton();abstract Panel createPanel();}

public class BlueSkinFactory extends AbstractFactory {@OverrideButton createButton() {return new BlueButton();}@OverridePanel createPanel() {return new BluePanel();}}

public class RedSkinFactory extends AbstractFactory{@OverrideButton createButton() {return new RedButton();}@OverridePanel createPanel() {return new RedPanel();}}

public interface Button {public void createButton();}

public interface Panel {public void createPanel();}

public class BlueButton implements Button{public void createButton() {System.out.println("create blue button");}}

public class BluePanel implements Panel{public void createPanel() {System.out.println("create Blue Panel");}}

public class RedButton implements Button{public void createButton() {System.out.println("create Red Button");}}

public class RedPanel implements Panel{public void createPanel() {System.out.println("create Red Panel");}}

public class Test {public static void main(String[] args) {AbstractFactory f = new RedSkinFactory();//只需要修改這句就可以實現換皮膚功能。如果寫在設定檔中就更方便了。Button b = f.createButton();b.createButton();Panel p = f.createPanel();p.createPanel();}}