昨天我下载了新的Spring 3.1RC来测试Spring MVC中刚刚引入的flash scoped变量支持。不幸的是我无法让它工作......
我有一个HTML表单,其中包含一些没有spring:forms标签的复选框。像这样:
<form action="/deleteaction" method="post">
<input type="checkbox" name="itemId" value="1" />
<input type="checkbox" name="itemId" value="2" />
<input type="submit" name="delete" value="Delete items" />
</form>
在Flash范围支持之前,我的带注释的控制器看起来像:
@RequestMapping(value = "/deleteaction", method = RequestMethod.POST, params={"delete"})
public String deleteItems(@RequestParam(value="itemId", required=false) String itemId[]) {
或者,我可以使用HttpServletRequest
代替@RequestParam
:
@RequestMapping(value = "/deleteaction", method = RequestMethod.POST, params={"delete"})
public String deleteItems(HttpServletRequest request) {
String itemIds[] = request.getParameterValues("itemId");
这两种方法都运行良好。如果我尝试将RedirectAttributes
添加到方法参数中,Spring将抛出异常:
@RequestMapping(value = "/deleteaction", method = RequestMethod.POST, params={"delete"})
public String deleteItems(@RequestParam(value="itemId", required=false) String itemId[], RedirectAttributes redirectAttrs) {
日志:
Oct 16, 2011 11:20:37 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [dispatcher] in context with path [/App] threw
exception [Request processing failed; nested exception is
java.lang.IllegalArgumentException: argument type mismatch] with root cause
java.lang.IllegalArgumentException: argument type mismatch
我做错了什么?如何获取RedirectAttribues参数在哪里添加闪存范围的变量?
答案 0 :(得分:4)
要使用新的RedirectAttributes
,必须在DefaultAnnotationHandlerMapping
中替换旧的AnnotationMethodHandlerAdapter
,AnnotationMethodHandlerExceptionResolver
和dispatcher-servlet.xml
。
有一种机会是使用<mvc:annotation-driven/>
,它在Spring 3.1中配置新类RequestMappingHandlerMapping
,RequestMappingHandlerAdapter
和ExceptionHandlerExceptionResolver
来替换旧类。
否则,必须在dispatcher-servlet.xml
中显式配置新的处理程序类。