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CommonsMultipartResolver (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.web.multipart.commons
Class CommonsMultipartResolver

java.lang.Object
  org.springframework.web.multipart.commons.CommonsFileUploadSupport
      org.springframework.web.multipart.commons.CommonsMultipartResolver

All Implemented Interfaces:

ServletContextAware, MultipartResolver

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public class CommonsMultipartResolver
extends CommonsFileUploadSupport
implements MultipartResolver, ServletContextAware

Servlet-based MultipartResolver implementation for Jakarta Commons FileUpload 1.1 or higher.

Provides maxUploadSize, maxInMemorySize, and defaultEncoding settings as bean properties (inherited from CommonsFileUploadSupport). See respective ServletFileUpload / DiskFileItemFactory properties (sizeMax, sizeThreshold, headerEncoding) for details in terms of defaults and accepted values.

Saves temporary files to the servlet container's temporary directory. Needs to be initialized either by an application context or via the constructor that takes a ServletContext (for standalone usage).

NOTE: As of Spring 2.0, this multipart resolver requires Commons FileUpload 1.1 or higher. The implementation does not use any deprecated FileUpload 1.0 API anymore, to be compatible with future Commons FileUpload releases.

Since:

29.09.2003

Author:

Trevor D. Cook, Juergen Hoeller

See Also:

CommonsMultipartResolver(ServletContext), CommonsMultipartFile, PortletMultipartResolver, ServletFileUpload, DiskFileItemFactory

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Nested Class Summary

 

Nested classes/interfaces inherited from class org.springframework.web.multipart.commons.CommonsFileUploadSupport
CommonsFileUploadSupport.MultipartParsingResult

 

Field Summary

 

Fields inherited from class org.springframework.web.multipart.commons.CommonsFileUploadSupport
logger

 

Constructor Summary
CommonsMultipartResolver()           Constructor for use as bean.
CommonsMultipartResolver(ServletContext servletContext)           Constructor for standalone usage.

 

Method Summary
void	cleanupMultipart(MultipartHttpServletRequest request)           Cleanup any resources used for the multipart handling, like a storage for the uploaded files.
protected  String	determineEncoding(HttpServletRequest request)           Determine the encoding for the given request.
boolean	isMultipart(HttpServletRequest request)           Determine if the given request contains multipart content.
protected  FileUpload	newFileUpload(FileItemFactory fileItemFactory)           Initialize the underlying org.apache.commons.fileupload.servlet.ServletFileUpload instance.
MultipartHttpServletRequest	resolveMultipart(HttpServletRequest request)           Parse the given HTTP request into multipart files and parameters, and wrap the request inside a MultipartHttpServletRequest object that provides access to file descriptors and makes contained parameters accessible via the standard ServletRequest methods.
void	setServletContext(ServletContext servletContext)           Set the ServletContext that this object runs in.

 

Methods inherited from class org.springframework.web.multipart.commons.CommonsFileUploadSupport
cleanupFileItems, getDefaultEncoding, getFileItemFactory, getFileUpload, isUploadTempDirSpecified, newFileItemFactory, parseFileItems, prepareFileUpload, setDefaultEncoding, setMaxInMemorySize, setMaxUploadSize, setUploadTempDir

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

CommonsMultipartResolver

public CommonsMultipartResolver()

Constructor for use as bean. Determines the servlet container's temporary directory via the ServletContext passed in as through the ServletContextAware interface (typically by a WebApplicationContext).

See Also:

setServletContext(javax.servlet.ServletContext), ServletContextAware, WebApplicationContext

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CommonsMultipartResolver

public CommonsMultipartResolver(ServletContext servletContext)

Constructor for standalone usage. Determines the servlet container's temporary directory via the given ServletContext.

Parameters:

servletContext - the ServletContext to use

Method Detail

newFileUpload

protected FileUpload newFileUpload(FileItemFactory fileItemFactory)

Initialize the underlying org.apache.commons.fileupload.servlet.ServletFileUpload instance. Can be overridden to use a custom subclass, e.g. for testing purposes.

Specified by:

newFileUpload in class CommonsFileUploadSupport

Parameters:

fileItemFactory - the Commons FileItemFactory to use

Returns:

the new ServletFileUpload instance

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setServletContext

public void setServletContext(ServletContext servletContext)

Description copied from interface: ServletContextAware

Set the ServletContext that this object runs in.

Invoked after population of normal bean properties but before an init callback like InitializingBean's afterPropertiesSet or a custom init-method. Invoked after ApplicationContextAware's setApplicationContext.

Specified by:

setServletContext in interface ServletContextAware

Parameters:

servletContext - ServletContext object to be used by this object

See Also:

InitializingBean.afterPropertiesSet(), ApplicationContextAware.setApplicationContext(org.springframework.context.ApplicationContext)

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isMultipart

public boolean isMultipart(HttpServletRequest request)

Description copied from interface: MultipartResolver

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.

Specified by:

isMultipart in interface MultipartResolver

Parameters:

request - the servlet request to be evaluated

Returns:

whether the request contains multipart content

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resolveMultipart

public MultipartHttpServletRequest resolveMultipart(HttpServletRequest request)
                                             throws MultipartException

Description copied from interface: MultipartResolver

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

Specified by:

resolveMultipart in interface MultipartResolver

Parameters:

request - the servlet request to wrap (must be of a multipart content type)

Returns:

the wrapped servlet request

Throws:

MultipartException - if the servlet request is not multipart, or if implementation-specific problems are encountered (such as exceeding file size limits)

See Also:

MultipartHttpServletRequest.getFile(java.lang.String), MultipartHttpServletRequest.getFileNames(), MultipartHttpServletRequest.getFileMap(), ServletRequest.getParameter(java.lang.String), ServletRequest.getParameterNames(), ServletRequest.getParameterMap()

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determineEncoding

protected String determineEncoding(HttpServletRequest request)

Determine the encoding for the given request. Can be overridden in subclasses.

The default implementation checks the request encoding, falling back to the default encoding specified for this resolver.

Parameters:

request - current HTTP request

Returns:

the encoding for the request (never null)

See Also:

ServletRequest.getCharacterEncoding(), CommonsFileUploadSupport.setDefaultEncoding(java.lang.String)

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cleanupMultipart

public void cleanupMultipart(MultipartHttpServletRequest request)

Description copied from interface: MultipartResolver

Cleanup any resources used for the multipart handling, like a storage for the uploaded files.

Specified by:

cleanupMultipart in interface MultipartResolver

Parameters:

request - the request to cleanup resources for

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