java.lang.Object
- org.springframework.core.io.AbstractResource
- - org.springframework.core.io.FileSystemResource

所有已实现的接口:
InputStreamSource, Resource, WritableResource
```
public class FileSystemResource
extends AbstractResource
implements WritableResource
```
Resource implementation for java.io.File and java.nio.file.Path handles with a file system target. Supports resolution as a File and also as a URL. Implements the extended WritableResource interface.
Note: As of Spring Framework 5.0, this Resource implementation uses NIO.2 API for read/write interactions. As of 5.1, it may be constructed with a Path handle in which case it will perform all file system interactions via NIO.2, only resorting to File on getFile().
从以下版本开始:
28.12.2003
作者:
Juergen Hoeller
另请参阅:
FileSystemResource(String), FileSystemResource(File), FileSystemResource(Path), File, Files

构造器概要

构造器
构造器	说明
`FileSystemResource(File file)`	Create a new `FileSystemResource` from a `File` handle.
`FileSystemResource(String path)`	Create a new `FileSystemResource` from a file path.
`FileSystemResource(FileSystem fileSystem, String path)`	Create a new `FileSystemResource` from a `FileSystem` handle, locating the specified path.
`FileSystemResource(Path filePath)`	Create a new `FileSystemResource` from a `Path` handle, performing all file system interactions via NIO.2 instead of `File`.

方法概要

所有方法实例方法具体方法
修饰符和类型	方法	说明
`long`	`contentLength()`	This implementation returns the underlying File/Path length.
`Resource`	`createRelative(String relativePath)`	This implementation creates a FileSystemResource, applying the given path relative to the path of the underlying file of this resource descriptor.
`boolean`	`equals(Object other)`	This implementation compares the underlying File references.
`boolean`	`exists()`	This implementation returns whether the underlying file exists.
`String`	`getDescription()`	This implementation returns a description that includes the absolute path of the file.
`File`	`getFile()`	This implementation returns the underlying File reference.
`String`	`getFilename()`	This implementation returns the name of the file.
`InputStream`	`getInputStream()`	This implementation opens a NIO file stream for the underlying file.
`OutputStream`	`getOutputStream()`	This implementation opens a FileOutputStream for the underlying file.
`String`	`getPath()`	Return the file path for this resource.
`URI`	`getURI()`	This implementation returns a URI for the underlying file.
`URL`	`getURL()`	This implementation returns a URL for the underlying file.
`int`	`hashCode()`	This implementation returns the hash code of the underlying File reference.
`boolean`	`isFile()`	This implementation always indicates a file.
`boolean`	`isReadable()`	This implementation checks whether the underlying file is marked as readable (and corresponds to an actual file with content, not to a directory).
`boolean`	`isWritable()`	This implementation checks whether the underlying file is marked as writable (and corresponds to an actual file with content, not to a directory).
`long`	`lastModified()`	This implementation returns the underlying File/Path last-modified time.
`ReadableByteChannel`	`readableChannel()`	This implementation opens a FileChannel for the underlying file.
`WritableByteChannel`	`writableChannel()`	This implementation opens a FileChannel for the underlying file.

从类继承的方法 org.springframework.core.io.AbstractResource
getFileForLastModifiedCheck, isOpen, toString

从类继承的方法 java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

从接口继承的方法 org.springframework.core.io.Resource
isOpen

- 构造器详细资料
  - FileSystemResource
```
public FileSystemResource(String path)
```
    Create a new FileSystemResource from a file path.
    Note: When building relative resources via createRelative(java.lang.String), it makes a difference whether the specified resource base path here ends with a slash or not. In the case of "C:/dir1/", relative paths will be built underneath that root: e.g. relative path "dir2" -> "C:/dir1/dir2". In the case of "C:/dir1", relative paths will apply at the same directory level: relative path "dir2" -> "C:/dir2".
    参数:
    path - a file path
    另请参阅:
    FileSystemResource(Path)
  - FileSystemResource
```
public FileSystemResource(File file)
```
    Create a new FileSystemResource from a File handle.
    Note: When building relative resources via createRelative(java.lang.String), the relative path will apply at the same directory level: e.g. new File("C:/dir1"), relative path "dir2" -> "C:/dir2"! If you prefer to have relative paths built underneath the given root directory, use the constructor with a file path to append a trailing slash to the root path: "C:/dir1/", which indicates this directory as root for all relative paths.
    参数:
    file - a File handle
    另请参阅:
    FileSystemResource(Path), getFile()
  - FileSystemResource
```
public FileSystemResource(Path filePath)
```
    Create a new FileSystemResource from a Path handle, performing all file system interactions via NIO.2 instead of File.
    In contrast to PathResource, this variant strictly follows the general FileSystemResource conventions, in particular in terms of path cleaning and createRelative(String) handling.
    Note: When building relative resources via createRelative(java.lang.String), the relative path will apply at the same directory level: e.g. Paths.get("C:/dir1"), relative path "dir2" -> "C:/dir2"! If you prefer to have relative paths built underneath the given root directory, use the constructor with a file path to append a trailing slash to the root path: "C:/dir1/", which indicates this directory as root for all relative paths. Alternatively, consider using PathResource(Path) for java.nio.path.Path resolution in createRelative, always nesting relative paths.
    参数:
    filePath - a Path handle to a file
    从以下版本开始:
    5.1
    另请参阅:
    FileSystemResource(File)
  - FileSystemResource
```
public FileSystemResource(FileSystem fileSystem,
                          String path)
```
    Create a new FileSystemResource from a FileSystem handle, locating the specified path.
    This is an alternative to FileSystemResource(String), performing all file system interactions via NIO.2 instead of File.
    参数:
    fileSystem - the FileSystem to locate the path within
    path - a file path
    从以下版本开始:
    5.1.1
    另请参阅:
    FileSystemResource(File)
- 方法详细资料
  - getPath
```
public final String getPath()
```
    Return the file path for this resource.
  - exists
```
public boolean exists()
```
    This implementation returns whether the underlying file exists.
    指定者:
    exists 在接口中 Resource
    覆盖:
    exists 在类中 AbstractResource
    另请参阅:
    File.exists()
  - isReadable
```
public boolean isReadable()
```
    This implementation checks whether the underlying file is marked as readable (and corresponds to an actual file with content, not to a directory).
    指定者:
    isReadable 在接口中 Resource
    覆盖:
    isReadable 在类中 AbstractResource
    另请参阅:
    File.canRead(), File.isDirectory()
  - getInputStream
```
public InputStream getInputStream()
                           throws IOException
```
    This implementation opens a NIO file stream for the underlying file.
    指定者:
    getInputStream 在接口中 InputStreamSource
    返回:
    the input stream for the underlying resource (must not be null)
    抛出:
    FileNotFoundException - if the underlying resource doesn't exist
    IOException - if the content stream could not be opened
    另请参阅:
    FileInputStream
  - isWritable
```
public boolean isWritable()
```
    This implementation checks whether the underlying file is marked as writable (and corresponds to an actual file with content, not to a directory).
    指定者:
    isWritable 在接口中 WritableResource
    另请参阅:
    File.canWrite(), File.isDirectory()
  - getOutputStream
```
public OutputStream getOutputStream()
                             throws IOException
```
    This implementation opens a FileOutputStream for the underlying file.
    指定者:
    getOutputStream 在接口中 WritableResource
    抛出:
    IOException - if the stream could not be opened
    另请参阅:
    FileOutputStream
  - getURL
```
public URL getURL()
           throws IOException
```
    This implementation returns a URL for the underlying file.
    指定者:
    getURL 在接口中 Resource
    覆盖:
    getURL 在类中 AbstractResource
    抛出:
    IOException - if the resource cannot be resolved as URL, i.e. if the resource is not available as descriptor
    另请参阅:
    File.toURI()
  - getURI
```
public URI getURI()
           throws IOException
```
    This implementation returns a URI for the underlying file.
    指定者:
    getURI 在接口中 Resource
    覆盖:
    getURI 在类中 AbstractResource
    抛出:
    IOException - if the resource cannot be resolved as URI, i.e. if the resource is not available as descriptor
    另请参阅:
    File.toURI()
  - isFile
```
public boolean isFile()
```
    This implementation always indicates a file.
    指定者:
    isFile 在接口中 Resource
    覆盖:
    isFile 在类中 AbstractResource
    另请参阅:
    Resource.getFile()
  - getFile
```
public File getFile()
```
    This implementation returns the underlying File reference.
    指定者:
    getFile 在接口中 Resource
    覆盖:
    getFile 在类中 AbstractResource
    另请参阅:
    InputStreamSource.getInputStream()
  - readableChannel
```
public ReadableByteChannel readableChannel()
                                    throws IOException
```
    This implementation opens a FileChannel for the underlying file.
    指定者:
    readableChannel 在接口中 Resource
    覆盖:
    readableChannel 在类中 AbstractResource
    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
    另请参阅:
    FileChannel
  - writableChannel
```
public WritableByteChannel writableChannel()
                                    throws IOException
```
    This implementation opens a FileChannel for the underlying file.
    指定者:
    writableChannel 在接口中 WritableResource
    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
    另请参阅:
    FileChannel
  - contentLength
```
public long contentLength()
                   throws IOException
```
    This implementation returns the underlying File/Path length.
    指定者:
    contentLength 在接口中 Resource
    覆盖:
    contentLength 在类中 AbstractResource
    抛出:
    IOException - if the resource cannot be resolved (in the file system or as some other known physical resource type)
    另请参阅:
    InputStreamSource.getInputStream()
  - lastModified
```
public long lastModified()
                  throws IOException
```
    This implementation returns the underlying File/Path last-modified time.
    指定者:
    lastModified 在接口中 Resource
    覆盖:
    lastModified 在类中 AbstractResource
    抛出:
    IOException - if the resource cannot be resolved (in the file system or as some other known physical resource type)
    另请参阅:
    AbstractResource.getFileForLastModifiedCheck()
  - createRelative
```
public Resource createRelative(String relativePath)
```
    This implementation creates a FileSystemResource, applying the given path relative to the path of the underlying file of this resource descriptor.
    指定者:
    createRelative 在接口中 Resource
    覆盖:
    createRelative 在类中 AbstractResource
    参数:
    relativePath - the relative path (relative to this resource)
    返回:
    the resource handle for the relative resource
    另请参阅:
    StringUtils.applyRelativePath(String, String)
  - getFilename
```
public String getFilename()
```
    This implementation returns the name of the file.
    指定者:
    getFilename 在接口中 Resource
    覆盖:
    getFilename 在类中 AbstractResource
    另请参阅:
    File.getName()
  - getDescription
```
public String getDescription()
```
    This implementation returns a description that includes the absolute path of the file.
    指定者:
    getDescription 在接口中 Resource
    另请参阅:
    File.getAbsolutePath()
  - equals
```
public boolean equals(@Nullable
                      Object other)
```
    This implementation compares the underlying File references.
    覆盖:
    equals 在类中 AbstractResource
    另请参阅:
    Resource.getDescription()
  - hashCode
```
public int hashCode()
```
    This implementation returns the hash code of the underlying File reference.
    覆盖:
    hashCode 在类中 AbstractResource
    另请参阅:
    Resource.getDescription()

类 FileSystemResource

构造器概要

方法概要

从类继承的方法 org.springframework.core.io.AbstractResource

从类继承的方法 java.lang.Object

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

构造器详细资料

FileSystemResource

FileSystemResource

FileSystemResource

FileSystemResource

方法详细资料

getPath

exists

isReadable

getInputStream

isWritable

getOutputStream

getURL

getURI

isFile

getFile

readableChannel

writableChannel

contentLength

lastModified

createRelative

getFilename

getDescription

equals

hashCode