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。
1 */ 2 public abstract class AbstractPayment { 3 4 public abstract String progress() throws Exception; 5 6 public abstract int notify(Map<String,String> map) throws Exception; 7 }
2、创建支付方式类继承抽象类实现具体的方法
1 */ 2 public class AlipayWap extends AbstractPayment { 3 4 @Override 5 public String progress() throws Exception { 6 return null; 7 } 8 9 @Override 10 public int notify(Map<String, String> map) throws Exception { 11 return 0; 12 } 13 }
3、创建支付相关工厂,初始化支付实例
1 public class PaymentFactory { 2 3 private static final Map<Integer, AbstractPayment> map = new HashMap<>(); 4 private static volatile boolean inited = false; 5 6 public AbstractPayment createPayment(int type) throws Exception { 7 if(!inited){ 8 init(); 9 } 10 AbstractPayment payment = map.get(type); 11 if(payment == null){ 12 13 System.out.println("payment ["+type+"] not exist."); 14 } 15 return payment; 16 } 17 private static void init() throws Exception { 18 AbstractPayment alipayWap = new AlipayWap(); 19 map.put(1, alipayWap); 20 inited = true; 21 } 22 }
4、测试调用
1 public class Test { 2 3 public static void main(String[] args) throws Exception { 4 AbstractPayment payment = new PaymentFactory().createPayment(1); 5 String progress = payment.progress(); 6 } 7 }
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。