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。