设计模式之工厂模式

1.简单工厂模式

public abstract Fruit {
    public abstract void printName();
}

public class Apple extends Fruit {
    public Apple() {
    }
    public void printName() {
       System.out.println("this is an apple");
    }
}

public class Orange {
    public Orange() {
    }
    public void printName() {
        System.out.println("this is an orange");
    }
}

public class ProduceFactory {
    public Fruit produce(String name) {
        if ("apple".equals(name)) {
            return new Apple();
        } 
        if ("orange".equals(name)) {
            return new Orange();
        } 
        return null;
    }
}

2.抽象工厂模式

public abstract class Fruit {
    public abstract void print();
}

public Apple extends Fruit {
    public Apple() {

    }
    public void print() {
        System.out.println("this is an apple");
    }

}

public Orange extends Fruit {
    public Orange() {

    }
    public void print() {
        System.out.println("this is an Orange");
    }
}

public abstract class Product {
    public Fruit produce(Class class);
}

public class FruitProduct extends Product {
    public Fruit produce(Class class) {
        Fruit fruit = null;
        try {
            fruit = (Fruit) Class.forName(class.getName()).newInstance();   
        } catch (Exception e) {
            e.printStackStrace();
        }
        return fruit;
    }
}