public interface InputStreamSource
InputStream.
 This is the base interface for Spring's more extensive Resource interface.
 
For single-use streams, InputStreamResource can be used for any
 given InputStream. Spring's ByteArrayResource or any
 file-based Resource implementation can be used as a concrete
 instance, allowing one to read the underlying content stream multiple times.
 This makes this interface useful as an abstract content source for mail
 attachments, for example.
InputStream, 
Resource, 
InputStreamResource, 
ByteArrayResource| Modifier and Type | Method and Description | 
|---|---|
| InputStream | getInputStream()Return an  InputStreamfor the content of an underlying resource. | 
InputStream getInputStream() throws IOException
InputStream for the content of an underlying resource.
 It is expected that each call creates a fresh stream.
This requirement is particularly important when you consider an API such
 as JavaMail, which needs to be able to read the stream multiple times when
 creating mail attachments. For such a use case, it is required
 that each getInputStream() call returns a fresh stream.
null)FileNotFoundException - if the underlying resource doesn't existIOException - if the content stream could not be opened