我正在尝试将spring MVC应用程序从3.0.6升级到3.1.2,并且一些以前工作的控制器似乎不再起作用了。我已经阅读了春季文档,但我对什么与什么兼容感到困惑。
我们有一个CustomWebArgumentResolver,它查找名为“asOf”的任何请求参数,并将其值转换为日期。我们称之为“AsOfDateConverter”,缺乏想象力。升级到spring-3.1.2时,我利用了新的命名空间功能并将其添加到我的applicationContext:
<mvc:annotation-driven conversion-service="conversionService">
<mvc:argument-resolvers>
<bean id="customWebArgumentResolver" class="my.converters.CustomWebArgumentResolver">
</bean>
</mvc:argument-resolvers>
</mvc:annotation-driven>
CustomWebArgumentResolver非常简单:
public class CustomWebArgumentResolver implements WebArgumentResolver {
private AsOfDateConverter asOfDateConverter;
@Override
public Object resolveArgument(MethodParameter methodParameter, NativeWebRequest webRequest) throws Exception {
if (isAsOfDateParameter(methodParameter)) {
return asOfDateConverter.convert(webRequest.getParameter("asOf"));
}
return UNRESOLVED;
}
然后一个示例控制器看起来像这样:
@Controller
@Secured({BaseController.ROLE_LOGGED_IN})
@org.springframework.transaction.annotation.Transactional
public class DashboardController extends BaseController {
public static final String URL = "/dashboard";
@RequestMapping(value=URL, method=RequestMethod.GET)
public ModelAndView get(@RequestParam(required=false) String requestedMeterType, @AsOf Date asOf) {
debug(log, "Rendering dashboard asOf %s", asOf);
etc etc
“asOf”参数为空,我确定我错过了一些明显的东西。如果有人在最新的MVC 3.1中深入研究,可能会指出我正确的方向,我将不胜感激。
谢谢! 汤姆
编辑: AsOf注释:
@Target(ElementType.PARAMETER)
@Retention(RetentionPolicy.RUNTIME)
public @interface AsOf {
}
更多我的applicationContext:
<mvc:annotation-driven conversion-service="conversionService">
<mvc:argument-resolvers>
<bean class="[blah].AsOfDateHandlerMethodArgumentResolver">
<property name="asOfDateConverter">
<bean class="[blah].AsOfDateConverter"/>
</property>
</bean>
</mvc:argument-resolvers>
</mvc:annotation-driven>
<!-- Added to re-support @Controller annotation scanning after upgrading to spring-3.1. -->
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>
<bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
<property name="converters">
<set>
<bean class="[blah].converters.CustomerConverter"/>
<bean class="[blah].converters.AccountConverter"/>
<bean class="[blah].converters.DateConverter"/>
<bean class="[blah].converters.CustomerCommunicationInstanceConverter"/>
<bean class="[blah].converters.MeterTypeConverter"/>
<bean class="[blah].converters.AreaAmountConverter" p:precision="0"/>
<bean class="[blah].converters.LengthAmountConverter" p:precision="1"/>
</set>
</property>
</bean>
答案 0 :(得分:6)
随着Spring 3.1改变了API - 用于解析控制器参数的实现接口是HandlerMethodArgumentResolver。您可以继续CustomWebArgumentResolver
adapting使用https://gist.github.com/3703430到HandlerMethodArgumentResolver
但是,更改代码以使用HandlerMethodArgumentResolver也很容易:
public class CustomWebArgumentResolver implements HandlerMethodArgumentResolver {
private AsOfDateConverter asOfDateConverter;
@Override
public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest webRequest, WebDataBinderFactory binderFactory) {
if (isAsOfDateParameter(methodParameter)) {
return asOfDateConverter.convert(webRequest.getParameter("asOf"));
}
return UNRESOLVED;
}
@Override
public boolean supportsParameter(MethodParameter parameter) {
return (methodParameter.getParameterAnnotation(AsOf.class)!=null)
}
修改强>
在查看您的评论后,我想我对可能出现的问题有所了解。你可以检查你的@AsOf注释,你可能还没有宣布Runtime的保留,这可能是WebArgumentResolver没有生效的原因:
@Retention(RetentionPolicy.RUNTIME)
public @interface AsOf {
}
无论如何,这里有一个完整的工作测试的要点:
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