从Spring 3升级到Spring 5--现在出现自动连接错误

Question

在部署应用程序时，我会遇到以下异常。

该组件为：

@Component
@Qualifier("healthPlanCheckoutFunnelStateHolderMapper")
public class HealthPlanCheckoutFunnelStateHolderMapper extends CommonHealthCheckoutFunnelStateHolderMapper<HealthPlanCheckoutBean>
{
    @Override
    protected HealthPlanCheckoutBean createBean() {
        return new HealthPlanCheckoutBean();
    }
}

而该组件的自动连接是：

@Autowired
@Qualifier("healthPlanCheckoutFunnelStateHolderMapper")
private FunnelStateHolderMapper<HealthPlanCheckoutBean, HealthPlanFunnelStateHolder> funnelStateHolderMapper;

FunnelStateHolderMapper接口

/**
 * Interface defines methods for mapping to and from a {@link FunnelStateHolder}. This is the top level mapper that
 * should be used by each controller for handling GET and POST requests. The implementation may delegate to other
 * underlying mappers but this should always be the interface to which the controller talks.
 */
public interface FunnelStateHolderMapper<B, F extends FunnelStateHolder> {

    B toScreenBean(F funnelStateHolder);

    F fromScreenBean(F funnelStateHolder, B screenBean);
}

在包含此代码所在包的配置中有一个组件扫描。

这在Spring3中工作得很好，但是自从切换到Spring5之后，这个问题就出现了。我想可能是我为了编译它而进行的一些重构导致了这个问题，但我不这么认为。以上代码所在的文件均未更新。

到目前为止，我还没有更新任何spring配置。spring 3和spring 5搜索组件的方式有区别吗？

Answer 1

现场

private FunnelStateHolderMapper<...> funnelStateHolderMapper;

与@component/@qualifier注释类的类型不同

HealthPlanCheckoutFunnelStateHolderMapper

您不能期望Spring会@autowire一些会引发编译/运行时错误的东西。