简单工厂及抽象工厂模式(SimpleFactory、AbstractFactory)

简单工厂

 

计算加减计算器

 

//操作符public abstract class Operate {private double num1;private double num2;public abstract double getResult();public double getNum1() {return num1;}public void setNum1(double num1) {this.num1 = num1;}public double getNum2() {return num2;}public void setNum2(double num2) {this.num2 = num2;}}//加法继承public class Plus extends Operate {@Overridepublic double getResult() {return (this.getNum1()+this.getNum2());}}//减法继承public class Sub extends Operate {@Overridepublic double getResult() {// TODO Auto-generated method stubreturn (this.getNum1()-this.getNum2());}}

 

//工厂类返回一个操作实例public class OperateFactory {//public static Operate getOperate(String oper){//if("+".equals(oper)){//return new Plus();//}else if("-".equals(oper)){//return new Sub();//}//return null;//}//利用反射解决封闭public static Operate getOperate(String oper){Operate o=null;try {o = (Operate)Class.forName("com.nbchina.design.pattern.factory1."+oper).newInstance();} catch (InstantiationException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IllegalAccessException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (ClassNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();}return o;}}

 

客户端测试类public class Test {public static void main(String[] args) {System.out.println("请输入第一个操作数");Scanner scanner = new Scanner(System.in);String number1=scanner.next();System.out.println("请输入操作符");String operate = scanner.next();System.out.println("请输入第二个操作数");String number2=scanner.next();double num1 = Double.parseDouble(number1);double num2 = Double.parseDouble(number2);Operate o = null;try {o = OperateFactory.getOperate("Sub");} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}o.setNum1(num1);o.setNum2(num2);System.out.println(o.getResult());}}

 

抽象工厂

 

 

public abstract class Car {abstract void run();abstract void stop();}public class Ford extends Car {@Overridevoid run() {System.out.println("福特车启动");}@Overridevoid stop() {System.out.println("福特车停止");}}public class Benz extends Car {@Overridevoid run() {System.out.println("奔驰车启动");}@Overridevoid stop() {System.out.println("奔驰车停止");}}

 

public abstract class Bus {abstract void run();abstract void stop();}public class MinBus extends Bus {@Overridevoid run() {System.out.println("小巴启动");}@Overridevoid stop() {System.out.println("小巴停止");}}public class BigBus extends Bus {@Overridevoid run() {System.out.println("大巴启动");}@Overridevoid stop() {System.out.println("大巴停止");}}

 

public class CarFactory {public static Car getCar(String type){Car c=null;try {c=(Car) Class.forName("com.nbchina.design.pattern.factory2."+type).newInstance();} catch (InstantiationException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IllegalAccessException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (ClassNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();}return c;}}public class BusFactory {public static Bus getBus(String type){Bus b=null;try {b=(Bus) Class.forName("com.nbchina.design.pattern.factory2."+type).newInstance();} catch (InstantiationException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IllegalAccessException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (ClassNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();}return b;}}

 

客户端测试类

 

public class Test {public static void main(String[] args) {Bus b = null;BusFactory bf = new BusFactory();b=bf.getBus("MinBus");b.run();b.stop();Car c = null;CarFactory cf = new CarFactory();c = cf.getCar("Ford");c.run();c.stop();}}