JAVA设计模式-工厂模式

//接口
interface Product1
{
    void method1();
}

//继承实现
class Product1A implements Product
{
    @Override
    public void method1() {
        System.out.println("ProductA---method1");
    }
}

//继承实现
class Product1B implements Product
{
    @Override
    public void method1() {
        System.out.println("ProductB---method1");
    }
}

//调用方式
public class FactoryMethod
{
    public static void main(String[] args) {
        Product product = new Product1A();
        product.method1();
    }
}

//接口
interface Product
{
    void method1();
}

//继承实现A
class ProductA implements Product
{
    @Override
    public void method1() {
        System.out.println("ProductA.method1 executed.");
    }
}

//继承实现B
class ProductB implements Product
{
    @Override
    public void method1() {
        System.out.println("ProductB.method1 executed.");
    }
}

// 简单工厂
class SimpleFactoryIn
{
    public static Product createProduct(String type) {
        if ("A".equals(type)) {
            return new ProductA();
        }
        else if ("B".equals(type)) {
            return new ProductB();
        }
        return null;
    }
}


public class SimpleFactory
{
    public static void main(String[] args) {
        Product product = SimpleFactoryIn.createProduct("A");
        product.method1();
    }
}

@Component
public class DynamicFactory
{

    private static Map dyFactory = new HashMap<>();

    
    public static void register(String type, ProductInter productInter) {
        if (type != null) {
            dyFactory.put(type, productInter);
        }
    }

    public static ProductInter getProduct(String type) {
        return dyFactory.get(type);
    }
}

//接口
public interface ProductInter
{
    void method1();
}

//继承实现
@Service
public class ProductImplA implements ProductInter
{

    //启动时加入到工程中
    @PostConstruct
    private void init() {
        DynamicFactory.register("productimpla", new ProductImplA());
    }

    @Override
    public void method1() {
        System.out.println("ProductA.method1 executed.");
    }
}

//继承实现
@Service
public class ProductImplB implements ProductInter
{
    @PostConstruct
    private void init() {
        DynamicFactory.register("productimplb", new ProductImplB());
    }

    @Override
    public void method1() {
        System.out.println("ProductB.method1 executed.");
    }
}

//测试
   @Test
    void test() {
    //传入对应的初始化名称
        ProductInter product = DynamicFactory.getProduct("productimpla");
        product.method1();
    }