定义

为创建一组相关或相互依赖的对象提供一个接口，而且无需指定他们的具体类。

UML类图

模式案例

//产品
public class Product {
}
public class ConcreteProductA extends Product{
}
public class ConcreteProductB extends Product{
}

//产品蔟A
public class ConcreteProductA1 extends ConcreteProductA{
}
public class ConcreteProductA2 extends ConcreteProductA{
}

//产品蔟B
public class ConcreteProductB1 extends ConcreteProductB{
}
public class ConcreteProductB2 extends ConcreteProductB{
}

//工厂
public abstract class Factory {
    abstract Product createProductA();

    abstract Product createProductB();
}

public class ConcreteFactoryA extends Factory {

    @Override
    Product createProductA() {
        return new ConcreteProductA1();
    }

    @Override
    Product createProductB() {
        return new ConcreteProductB1();
    }
}

此篇文章仅作笔记