Summary: Methods | [Expand All]
public interface

PortletMultipartResolver

org.springframework.web.portlet.multipart.PortletMultipartResolver
Known Indirect Subclasses

Class Overview

Portlet version of Spring's multipart resolution strategy for file uploads as defined in RFC 1867.

Implementations are typically usable both within any application context and standalone.

There is one concrete implementation included in Spring:

There is no default resolver implementation used for Spring DispatcherPortlets, as an application might choose to parse its multipart requests itself. To define an implementation, create a bean with the id "portletMultipartResolver" in a DispatcherPortlet's application context. Such a resolver gets applied to all requests handled by that DispatcherPortlet.

If a DispatcherPortlet detects a multipart request, it will resolve it via the configured MultipartResolver and pass on a wrapped Portlet ActionRequest. Controllers can then cast their given request to the MultipartActionRequest interface, being able to access MultipartFiles. Note that this cast is only supported in case of an actual multipart request. 

 public void handleActionRequest(ActionRequest request, ActionResponse response) {
   MultipartActionRequest multipartRequest = (MultipartActionRequest) request;
   MultipartFile multipartFile = multipartRequest.getFile("image");
   ...
 }
Instead of direct access, command or form controllers can register a ByteArrayMultipartFileEditor or StringMultipartFileEditor with their data binder, to automatically apply multipart content to command bean properties.

Note: There is hardly ever a need to access the MultipartResolver itself from application code. It will simply do its work behind the scenes, making MultipartActionRequests available to controllers.

See Also

Summary

Public Methods
abstract void cleanupMultipart(MultipartActionRequest request)
Cleanup any resources used for the multipart handling, such as storage for any uploaded file(s).
abstract boolean isMultipart(ActionRequest request)
Determine if the given request contains multipart content.
abstract MultipartActionRequest resolveMultipart(ActionRequest request)
Parse the given portlet request into multipart files and parameters, and wrap the request inside a MultipartActionRequest object that provides access to file descriptors and makes contained parameters accessible via the standard PortletRequest methods.

Public Methods

public abstract void cleanupMultipart (MultipartActionRequest request)

Cleanup any resources used for the multipart handling, such as storage for any uploaded file(s).

Parameters
request the request to cleanup resources for

public abstract boolean isMultipart (ActionRequest request)

Determine if the given request contains multipart content.

Will typically check for content type "multipart/form-data", but the actually accepted requests might depend on the capabilities of the resolver implementation.

Parameters
request the portlet request to be evaluated
Returns
  • whether the request contains multipart content

public abstract MultipartActionRequest resolveMultipart (ActionRequest request)

Parse the given portlet request into multipart files and parameters, and wrap the request inside a MultipartActionRequest object that provides access to file descriptors and makes contained parameters accessible via the standard PortletRequest methods.

Parameters
request the portlet request to wrap (must be of a multipart content type)
Returns
  • the wrapped portlet request
Throws
MultipartException if the portlet request is not multipart, or if implementation-specific problems are encountered (such as exceeding file size limits)
See Also