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CommonsMultipartFile (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 CommonsMultipartFile

java.lang.Object
  org.springframework.web.multipart.commons.CommonsMultipartFile

All Implemented Interfaces:

Serializable, MultipartFile

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public class CommonsMultipartFile
extends Object
implements MultipartFile, Serializable

MultipartFile implementation for Jakarta Commons FileUpload.

NOTE: As of Spring 2.0, this class 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, Serialized Form

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Field Summary
protected static Log	logger

 

Constructor Summary
CommonsMultipartFile(FileItem fileItem)           Create an instance wrapping the given FileItem.

 

Method Summary
byte[]	getBytes()           Return the contents of the file as an array of bytes.
String	getContentType()           Return the content type of the file.
FileItem	getFileItem()           Return the underlying org.apache.commons.fileupload.FileItem instance.
InputStream	getInputStream()           Return an InputStream to read the contents of the file from.
String	getName()           Return the name of the parameter in the multipart form.
String	getOriginalFilename()           Return the original filename in the client's filesystem.
long	getSize()           Return the size of the file in bytes.
String	getStorageDescription()           Return a description for the storage location of the multipart content.
protected  boolean	isAvailable()           Determine whether the multipart content is still available.
boolean	isEmpty()           Return whether the uploaded file is empty, that is, either no file has been chosen in the multipart form or the chosen file has no content.
void	transferTo(File dest)           Transfer the received file to the given destination file.

 

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

 

Field Detail

logger

protected static final Log logger

Constructor Detail

CommonsMultipartFile

public CommonsMultipartFile(FileItem fileItem)

Create an instance wrapping the given FileItem.

Parameters:

fileItem - the FileItem to wrap

Method Detail

getFileItem

public final FileItem getFileItem()

Return the underlying org.apache.commons.fileupload.FileItem instance. There is hardly any need to access this.

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getName

public String getName()

Description copied from interface: MultipartFile

Return the name of the parameter in the multipart form.

Specified by:

getName in interface MultipartFile

Returns:

the name of the parameter (never null or empty)

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getOriginalFilename

public String getOriginalFilename()

Description copied from interface: MultipartFile

Return the original filename in the client's filesystem.

This may contain path information depending on the browser used, but it typically will not with any other than Opera.

Specified by:

getOriginalFilename in interface MultipartFile

Returns:

the original filename, or the empty String if no file has been chosen in the multipart form

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getContentType

public String getContentType()

Description copied from interface: MultipartFile

Return the content type of the file.

Specified by:

getContentType in interface MultipartFile

Returns:

the content type, or null if not defined (or no file has been chosen in the multipart form)

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isEmpty

public boolean isEmpty()

Description copied from interface: MultipartFile

Return whether the uploaded file is empty, that is, either no file has been chosen in the multipart form or the chosen file has no content.

Specified by:

isEmpty in interface MultipartFile

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getSize

public long getSize()

Description copied from interface: MultipartFile

Return the size of the file in bytes.

Specified by:

getSize in interface MultipartFile

Returns:

the size of the file, or 0 if empty

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getBytes

public byte[] getBytes()

Description copied from interface: MultipartFile

Return the contents of the file as an array of bytes.

Specified by:

getBytes in interface MultipartFile

Returns:

the contents of the file as bytes, or an empty byte array if empty

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getInputStream

public InputStream getInputStream()
                           throws IOException

Description copied from interface: MultipartFile

Return an InputStream to read the contents of the file from. The user is responsible for closing the stream.

Specified by:

getInputStream in interface MultipartFile

Returns:

the contents of the file as stream, or an empty stream if empty

Throws:

IOException - in case of access errors (if the temporary store fails)

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transferTo

public void transferTo(File dest)
                throws IOException,
                       IllegalStateException

Description copied from interface: MultipartFile

Transfer the received file to the given destination file.

This may either move the file in the filesystem, copy the file in the filesystem, or save memory-held contents to the destination file. If the destination file already exists, it will be deleted first.

If the file has been moved in the filesystem, this operation cannot be invoked again. Therefore, call this method just once to be able to work with any storage mechanism.

Specified by:

transferTo in interface MultipartFile

Parameters:

dest - the destination file

Throws:

IOException - in case of reading or writing errors

IllegalStateException - if the file has already been moved in the filesystem and is not available anymore for another transfer

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isAvailable

protected boolean isAvailable()

Determine whether the multipart content is still available. If a temporary file has been moved, the content is no longer available.

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getStorageDescription

public String getStorageDescription()

Return a description for the storage location of the multipart content. Tries to be as specific as possible: mentions the file location in case of a temporary file.

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