MultipartDecoder (Tapestry API - 5.7.2)乐学网一站式学习平台

All Known Implementing Classes:

MultipartDecoderImpl
```
public interface MultipartDecoder
```
Responsible for detecting and processing file upload requests, using Jakarta Commons FileUpload. Implementations of this service typically use the threaded service lifecycle model.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`HttpServletRequest`	`decode(HttpServletRequest request)`	Decodes the request, returning a new `HttpServletRequest` implementation that will allow access to the form fields submitted in the request (but omits uploaded files).
`UploadedFile`	`getFileUpload(String parameterName)`
`org.apache.commons.fileupload.FileUploadException`	`getUploadException()`	Returns the exception the occured during the file upload, or null if the processing of the multipart upload stream was succesful.

- Method Detail
  - getFileUpload
```
UploadedFile getFileUpload(String parameterName)
```
    Parameters:
    
    parameterName - Name of the query parameter associated with the uploaded file
    
    Returns:
    
    a file upload with the given name, or null if no such file upload was in the request.
  - decode
```
HttpServletRequest decode(HttpServletRequest request)
```
    Decodes the request, returning a new HttpServletRequest implementation that will allow access to the form fields submitted in the request (but omits uploaded files).
    
    Parameters:
    
    request - The incoming servlet request
    
    Returns:
    
    decoded http request
  - getUploadException
```
org.apache.commons.fileupload.FileUploadException getUploadException()
```
    Returns the exception the occured during the file upload, or null if the processing of the multipart upload stream was succesful.