我正在尝试将文件上传添加到我的Spring Webflog表单处理中。只要表单enctype没有设置为multipart / form-data,表单submition就可以了。但是在我将Spring输入enctype =“multipart / form-data”后,会发生以下异常:
java.lang.IllegalStateException: A flow execution action URL can only be obtained in a RenderRequest or a ResourceRequest
at org.springframework.webflow.context.portlet.PortletExternalContext.getFlowExecutionUrl(PortletExternalContext.java:215)
at org.springframework.webflow.engine.impl.RequestControlContextImpl.getFlowExecutionUrl(RequestControlContextImpl.java:178)
at org.springframework.webflow.mvc.view.AbstractMvcView.render(AbstractMvcView.java:189)
at org.springframework.webflow.engine.ViewState.render(ViewState.java:293)
at org.springframework.webflow.engine.ViewState.refresh(ViewState.java:242)
at org.springframework.webflow.engine.ViewState.resume(ViewState.java:220)
at org.springframework.webflow.engine.Flow.resume(Flow.java:537)
at org.springframework.webflow.engine.impl.FlowExecutionImpl.resume(FlowExecutionImpl.java:259)
at org.springframework.webflow.executor.FlowExecutorImpl.resumeExecution(FlowExecutorImpl.java:169)
at org.springframework.webflow.mvc.portlet.FlowHandlerAdapter.handleAction(FlowHandlerAdapter.java:161)
at org.springframework.web.portlet.DispatcherPortlet.doActionService(DispatcherPortlet.java:670)
at org.springframework.web.portlet.FrameworkPortlet.processRequest(FrameworkPortlet.java:520)
at org.springframework.web.portlet.FrameworkPortlet.processAction(FrameworkPortlet.java:461)
at com.liferay.portlet.FilterChainImpl.doFilter(FilterChainImpl.java:71)
我已将CommonsMultipartResolver添加到我的春季语境中:
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- Limit uploads to one byte smaller than the server is allowed to handle -->
<property name="maxUploadSize" value="100000" />
</bean>
并在我的pom.xml中有commons-fileupload.jar:
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.2.2</version>
</dependency>
我的JSP看起来像这样:
<portlet:actionURL var="processFormAction" >
<portlet:param name="execution" value="${flowExecutionKey}"/>
</portlet:actionURL>
<form:form action="${processFormAction}" modelAttribute="customerModel" enctype="multipart/form-data" method="post" >
<form:input path="firstName" cssClass="input-size-1 valid-required" />
<form:input path="lastName" cssClass="input-size-1 valid-required" />
<input name="avatar" id="avatar" type="file"/>
<input type="submit" name="_eventId_submit" id="send" value="Submit"/>
</form:form>
我的flow.xml定义:
<view-state id="state1" model="customerModel">
...
<transition on="submit" to="submitFormActions"/>
</view-state>
<action-state id="submitFormActions">
<evaluate expression="portletAction.processForm(customerModel, flowRequestContext)" />
<transition on="success" to="state2"/>
<transition on="error" to="state1" />
</action-state>
模型对象:
public class CustomerModel implements Serializable{
private String firstName;
private String lastName;
private MutlipartFile avatar;
...
//public getters and setters
}
有什么想法可能是错的?正如我所说,没有enctype =“multipart / form-data”,表单处理效果很好。
由于
答案 0 :(得分:2)
您正在使用org.springframework.web.multipart.commons.CommonsMultipartResolver,它不了解portlet上下文。 您需要将CommonsMultipartResolver更改为:
<bean id="portletMultipartResolver"
class="org.springframework.web.portlet.multipart.CommonsPortletMultipartResolver">
<!-- one of the properties available; the maximum file size in bytes -->
<property name="maxUploadSize" value="100000"/>
</bean>
此外,要让DispatcherPortlet识别此bean,您需要如上所述定义此bean ID。 doc说:
Any configured PortletMultipartResolver bean must have the following id (or name): "portletMultipartResolver".
If you have defined your PortletMultipartResolver with any other name, then the DispatcherPortlet will not
find your PortletMultipartResolver, and consequently no multipart support will be in effect.