在Grails 2.3.7中上传文件时出错

问题描述

我将在发送电子邮件时附加文件.

I am going to attach a file when send the email.

<g:formRemote id="emailWidgetForm" name="emailOrderMailForm" enctype="multipart/form-data"
 on404="alert('not found!')"
 onLoading="showSpinner('emailWidget');" onComplete="hideSpinner();"
 url="[controller: 'emailSender', action:'sendPersonalEmailToCustomer']"
 action="${createLink(controller: 'emailOrder', action:
 'sendPersonalEmailToCustomer')}"
 before="if( validateGivenForm( 'emailWidgetForm' ) ) { " after="}">

 <tr>
 <td><strong>Attachment</strong></td>
 <td><input type="file" size="10" name="attachments"/></td>
 </tr>
 <g:submitButton name="sendEmailButton" class="btn btn-primary pull-right"
                    value="Send  Email"/>
 </g:formRemote>

当我要像这样在控制器中使用它

When I am going to get this in controler like

def file = request.getFile('attachments');

我在上面的这一行中遇到了错误.

I am getting Error on this above line.

错误是

groovy.lang.MissingMethodException: No signature of method:
org.springframework.security.web.servletapi.HttpServlet3RequestFactory$Servlet3SecurityContextHolderAwareRequestWrapper.getFile() is applicable for argument types: (java.lang.String) values: [attachments]
Possible solutions: getXML(), getPart(java.lang.String), getAt(java.lang.String), getAt(java.lang.String), getLocale(), getJSON()

请帮助我.

推荐答案

[编辑-根据Burt的评论忽略此内容.它仅适用于Java/Spring]

[Edit - disregard this as per Burt's comment. It would only work in Java/Spring]

您可能必须将request对象转换为通常的MultipartHttpServletRequest:

You might have to cast your request object to the usual MultipartHttpServletRequest:

MultipartHttpServletRequest mhsr = (MultipartHttpServletRequest) request
MultipartFile file = mhsr.getFile("attachments")

我猜测，由于Spring安全性似乎正在注入其自己的Servlet3SecurityContextHolderAwareRequestWrapper版本的request.

As Spring security appears to be injecting its own Servlet3SecurityContextHolderAwareRequestWrapper version of request, I'm guessing.

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