所有超级接口:
InputStreamSource
所有已知实现类:
CommonsMultipartFile, MockMultipartFile
```
public interface MultipartFile
extends InputStreamSource
```
A representation of an uploaded file received in a multipart request.
The file contents are either stored in memory or temporarily on disk. In either case, the user is responsible for copying file contents to a session-level or persistent store as and if desired. The temporary storage will be cleared at the end of request processing.
从以下版本开始:
29.09.2003
作者:
Juergen Hoeller, Trevor D. Cook
另请参阅:
MultipartHttpServletRequest, MultipartResolver

方法概要

所有方法实例方法抽象方法
修饰符和类型	方法	说明
`byte[]`	`getBytes()`	Return the contents of the file as an array of bytes.
`String`	`getContentType()`	Return the content type of the file.
`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.
`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.

- 方法详细资料
  - getName
```
String getName()
```
    Return the name of the parameter in the multipart form.
    返回:
    the name of the parameter (never null or empty)
  - getOriginalFilename
```
String getOriginalFilename()
```
    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.
    返回:
    the original filename, or the empty String if no file has been chosen in the multipart form, or null if not defined or not available
    另请参阅:
    FileItem.getName(), CommonsMultipartFile.setPreserveFilename(boolean)
  - getContentType
```
String getContentType()
```
    Return the content type of the file.
    返回:
    the content type, or null if not defined (or no file has been chosen in the multipart form)
  - isEmpty
```
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.
  - getSize
```
long getSize()
```
    Return the size of the file in bytes.
    返回:
    the size of the file, or 0 if empty
  - getBytes
```
byte[] getBytes()
         throws IOException
```
    Return the contents of the file as an array of bytes.
    返回:
    the contents of the file as bytes, or an empty byte array if empty
    抛出:
    IOException - in case of access errors (if the temporary store fails)
  - getInputStream
```
InputStream getInputStream()
                    throws IOException
```
    Return an InputStream to read the contents of the file from.
    The user is responsible for closing the returned stream.
    指定者:
    getInputStream 在接口中 InputStreamSource
    返回:
    the contents of the file as stream, or an empty stream if empty
    抛出:
    IOException - in case of access errors (if the temporary store fails)
  - transferTo
```
void transferTo(File dest)
         throws IOException,
                IllegalStateException
```
    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 target file has been moved in the filesystem, this operation cannot be invoked again afterwards. Therefore, call this method just once in order to work with any storage mechanism.
    NOTE: Depending on the underlying provider, temporary storage may be container-dependent, including the base directory for relative destinations specified here (e.g. with Servlet 3.0 multipart handling). For absolute destinations, the target file may get renamed/moved from its temporary location or newly copied, even if a temporary copy already exists.
    参数:
    dest - the destination file (typically absolute)
    抛出:
    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
    另请参阅:
    FileItem.write(File), Part.write(String)

接口 MultipartFile

方法概要

方法详细资料

getName

getOriginalFilename

getContentType

isEmpty

getSize

getBytes

getInputStream

transferTo