java 使用抽象工厂封装特性方法

1、创建抽象类：封装含有相同特性的方法。

 */
public abstract class AbstractPayment {

    public abstract String progress() throws Exception;

    public abstract int notify(Map<String,String> map) throws Exception;
}

2、创建支付方式类继承抽象类实现具体的方法

 */
public class AlipayWap extends AbstractPayment {

    @Override
    public String progress() throws Exception {
        return null;
    }

    @Override
    public int notify(Map<String, String> map) throws Exception {
        return 0;
    }
}

3、创建支付相关工厂，初始化支付实例

public class PaymentFactory {

    private static final Map<Integer, AbstractPayment> map = new HashMap<>();
    private static volatile boolean inited = false;

    public AbstractPayment createPayment(int type) throws Exception {
        if(!inited){
            init();
        }
        AbstractPayment payment = map.get(type);
        if(payment == null){

            System.out.println("payment ["+type+"] not exist.");
        }
        return payment;
    }
    private static void init() throws Exception {
        AbstractPayment alipayWap = new AlipayWap();
        map.put(1, alipayWap);
        inited = true;
    }
}

4、测试调用

public class Test {

    public static void main(String[] args) throws Exception {
        AbstractPayment payment = new PaymentFactory().createPayment(1);
        String progress = payment.progress();
    }
}

 使用抽象工厂类，以后接入其他支付时。直接添加一个支付实体类ok，然后在 PaymentFactory 进行实例化即可。