第4回：DIコンテナとの比較 (2/4)

<beans>
   <bean id="authService" class="AuthService" >
      <property name="cardAuth" >
         <ref bean="creditCardAuth" />
      </property>
   </bean>
</beans>


<beans>
   <bean id="creditCardAuth" class="CreditCardAuthMock" />
</beans>


<beans>
   <bean id="creditCardAuth" class="CreditCardAuthImpl" />
</beans>


public class AuthService {
   private CreditCardAuth cardAuth;
   public boolean buy(int itemNo, String cardNo){
      boolean card_result = cardAuth.auth(cardNo);
      （中略）
   }
（中略）
}


public interface CreditCardAuth {
   public boolean auth(String cardNo);
}


public class CreditCardAuthMock implements CreditCardAuth {
   public boolean auth(String cardNo) {
   return true
   }
}


public class CreditCardAuthImpl implements CreditCardAuth {
   public boolean auth(String cardNo) {
      //クレジットカード処理を記述
   （中略）
   }
}