edit

src/main/java/lingtao/net/Factory/CardPricingStrategy.java

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+package lingtao.net.Factory;public class CardPricingStrategy {
+}

src/main/java/lingtao/net/Factory/MetalTargetStrategy.java

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+package lingtao.net.Factory;public class MetalTargetStrategy {
+}

src/main/java/lingtao/net/Factory/PricingStrategy.java

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+package lingtao.net.Factory;public interface PricingStrategy {
+}

src/main/java/lingtao/net/Factory/PricingStrategyFactory.java

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+package lingtao.net.Factory;public class PricingStrategyFactory {
+}