类 FileSystemResource

构造器详细资料

• 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

• 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

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 FileInputStream 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()

• 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()

• contentLength

  public long contentLength()
                     throws IOException

  This implementation returns the underlying File's 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()

• 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​(Object obj)

  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()