简单工厂模式

Product:抽象产品角色,它定义了这个产品的通用属性,相当于模子,它定义了一些功能,这些功能可以由子类去实现

ConcreteProduct:具体产品角色,它实现了抽象产品所定义的功能,每个 ConcreteProduct 相当于一个产品种类

SimpleFactory:具体工厂模式类,它实现了抽象工厂定义的所有功能,负责创建具体的产品,它根据这个工厂的具体实现来生产具体的产品,但是这个产品也都具有符合抽象产品类定义的功能

Product

package design.pattern.simplefactory;

public abstract class Product {
    private String type;
    public Product(String type) {
        this.type = type;
    }
    public String getType() {
        return type;
    }
    public abstract void function();
}

ConcreteProduct

package design.pattern.simplefactory;

public class ConcreteProduct extends Product {

    public ConcreteProduct(String type) {
        super(type);
    }

    @Override
    public void function() {
        System.out.println("ConcreteProduct");        
    }

}

SimpleFactory

package design.pattern.simplefactory;

public class SimpleFactory {
    public Product getProduct() {
        return new ConcreteProduct("Type A");
    }
}

Client

package design.pattern.simplefactory;

public class Client {
    public static void main(String[] args) {
        new SimpleFactory().getProduct().function();
    }
}

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