1.定義基類接口：

public interface IModelParamStrategy extends InitializingBean {
    void checkParam(HttpContextDto httpContextDto);
}

2.定義抽象類，實現策略接口

定義一個抽象類 AbstractModelParamStrategy，它實現了部分 IModelParamStrategy 接口的功能，并留出 checkParam方法需要被具體策略實現類實現

public abstract class AbstractModelParamStrategy implements IModelParamStrategy {

    @Override
    public abstract  void checkParam(HttpContextDto httpContextDto);
}

3.具體的策略實現類

public class ChatParamStrategyV1 extends AbstractModelParamStrategy {

    @Override
    public void checkParam(HttpContextDto httpContextDto) {
     
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        StrategyFactory.register("chat", this);
    }
}

4.實現策略工廠類

public class StrategyFactory {
     /**
     * 存放特殊策略的工廠，使用名稱注冊
     */
    private static Map<String, IModelParamStrategy> nameFactory = new ConcurrentHashMap<>(1);

    public static void register(String name, IModelParamStrategy strategy) {
        if (Objects.isNull(name) || Objects.isNull(strategy)) {
            throw new RuntimeException("參數不能為空！");
        }
        if (nameFactory.containsKey(name)) {
            throw new RuntimeException(String.format("%s類型已被注冊！", name));
        }
        nameFactory.put(name, strategy);
    }
        public static IModelParamStrategy get(String name) {
        if (!nameFactory.containsKey(name)) {
            throw new RuntimeException(name + "類型未支持！");
        }
        return nameFactory.get(name);
    }
}

控制類：

  IModelParamStrategy paramStrategy = StrategyFactory.get("chat");
        paramStrategy.checkParam(httpContextDto);