WritableResource (Spring Framework 5.2.12.RELEASE API)

所有超级接口:
InputStreamSource, Resource
所有已知实现类:
FileSystemResource, FileUrlResource, PathResource
```
public interface WritableResource
extends Resource
```
Extended interface for a resource that supports writing to it. Provides an OutputStream accessor.
从以下版本开始:
3.1
作者:
Juergen Hoeller
另请参阅:
OutputStream

方法概要

所有方法实例方法抽象方法默认方法
修饰符和类型	方法	说明
`OutputStream`	`getOutputStream()`	Return an `OutputStream` for the underlying resource, allowing to (over-)write its content.
`default boolean`	`isWritable()`	Indicate whether the contents of this resource can be written via `getOutputStream()`.
`default WritableByteChannel`	`writableChannel()`	Return a `WritableByteChannel`.

从接口继承的方法 org.springframework.core.io.InputStreamSource
getInputStream

从接口继承的方法 org.springframework.core.io.Resource
contentLength, createRelative, exists, getDescription, getFile, getFilename, getURI, getURL, isFile, isOpen, isReadable, lastModified, readableChannel

- 方法详细资料
  - isWritable
```
default boolean isWritable()
```
    Indicate whether the contents of this resource can be written via getOutputStream().
    Will be true for typical resource descriptors; note that actual content writing may still fail when attempted. However, a value of false is a definitive indication that the resource content cannot be modified.
    另请参阅:
    getOutputStream(), Resource.isReadable()
  - getOutputStream
```
OutputStream getOutputStream()
                      throws IOException
```
    Return an OutputStream for the underlying resource, allowing to (over-)write its content.
    抛出:
    IOException - if the stream could not be opened
    另请参阅:
    InputStreamSource.getInputStream()
  - writableChannel
```
default WritableByteChannel writableChannel()
                                     throws IOException
```
    Return a WritableByteChannel.
    It is expected that each call creates a fresh channel.
    The default implementation returns Channels.newChannel(OutputStream) with the result of getOutputStream().
    返回:
    the byte channel for the underlying resource (must not be null)
    抛出:
    FileNotFoundException - if the underlying resource doesn't exist
    IOException - if the content channel could not be opened
    从以下版本开始:
    5.0
    另请参阅:
    getOutputStream()