构造器注入,

@Slf4j
@Component
public class DirectRequestParamHandleFactory {
    HashMap<String, DirectRequestParamHandle> serviceCache = new HashMap<>();

    public DirectRequestParamHandleFactory(List<DirectRequestParamHandle> directParamHandles) {
        for (DirectRequestParamHandle directParamHandle : directParamHandles) {
            serviceCache.put(directParamHandle.getBankCode(), directParamHandle);
        }
    }
}   

会把所有的接口实现类放入到list内 (

List<DirectRequestParamHandle>

)