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Resin's Virtual File System.  Resin's VFS combines and simplifies the morass
in Java I/O.  The core classes are:

Path -- API similar to File, but supports URLs as well as
paths.
ReadStream -- buffered read stream handing both
byte and character input
WriteStream -- buffered write stream handling both
byte and character output


Virtual Paths

Path access is based on standard URLs.  The following URL schemes are
predefined.

file: -- the standard filesystem
http: -- the http filesystem
mailto: -- sending mail
stdout: -- standard output (System.out)
stderr: -- standard error (System.err)
tcp: -- TCP socket pair
null: -- /dev/null
log: -- debug logging (controlled by resin.conf)


Reading a File

ReadStream implements InputStream so it can be
used wherever an InputStream is appropriate.

The Vfs facade is convenient for opening files.

ReadStream rs = Vfs.openRead("http://www.yahoo.com");
int ch;

while ((ch = rs.read()) >= 0)
  System.out.print((char) ch);


Writing a File

WriteStream implements OutputStream so it can be
used wherever an OutputStream is appropriate.  It also implements
the familiar print() methods from PrintStream,
although they do throw IOExceptions.

The Vfs facade is convenient for opening files.

WriteStream ws = Vfs.openWrite("mailto:[email protected]");
ws.setAttribute("subject", "hi, there");

ws.println("Just a little hello, world message");
ws.close();