上传文件抛出方法异常没有签名（在getFile（）方法中）

Question

我试图上传文件，并将其存储在文件中。这是GSP代码：

<g:form method="post" enctype="multipart/form-data" action="update"> 
<input type="file" name="cv" id="cv"/> 
<g:actionSubmit action="upload" name="upload" value="Upload" /> 
</g:form> 

在控制器：

def upload(){ 
def f = request.getFile('cv') 
InputStream file = f.inputStream 
byte[] bytes = file.bytes 
println('bytes: '+bytes) 
} 

正如我在标题中说，我有一个例外这里。任何帮助？谢谢。

EDIT（全堆栈跟踪，按要求）：

Error 500: Internal Server Error 

URI 
/com.publidirecta.azafatas/azafataCertificada/index 
Class 
groovy.lang.MissingMethodException 
Message 
No signature of method:org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestWrapper.getFile() is applicable for argument types: (java.lang.String) values: [cv] Possible solutions: getXML(), getPart(java.lang.String), getAt(java.lang.String), getAt(java.lang.String), getLocale(), getJSON() 

Around line 1158 of grails-app/controllers/com/publidirecta/AzafataCertificadaController.groovy 

1155:   def upload(){ 
1156:  println("Acción upload. Params: "+params) 
1157:  Azafata aza=Azafata.findByUsername(params.user) 
1158:  def f = request.getFile('cv') 
1159:  InputStream file = f.inputStream 
1160:  byte[] bytes = file.bytes 
1161:    } 


Trace 

    Line | Method 
->> 1158 | upload in AzafataCertificadaController.groovy 
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
| 886 | runTask in java.util.concurrent.ThreadPoolExecutor$Worker 
| 908 | run . . in  '' 
^ 680 | run  in java.lang.Thread 

Answer 1

的问题是，你的请求不作为MultiPartRequest处理。做这样的事情：

MultipartRequest multipartRequest = request as MultipartRequest 
    if(multipartRequest){ 
    MultipartFile attachmentFile = multipartRequest.getFile("attachment_file".toString()) 
    if (attachmentFile) { 
     -- copy it --- 
    } 
    }