Import java.io. *;
Import java.util.jar. *;
Import java.util.zip. *;
Public class extractfromjar {
Public void extractMydbfromjar (String Dest) {
Try {
String home = getClass (). GetProtectionDomain ().
GetCodesource (). getLocation (). Tostring ().
Substring (6);
Jarfile jar = new jarfile (home);
ZIPENTRY Entry = jar.geTEntry ("mydb.mdb");
File Efile = New File (DEST, Entry.getName ());
InputStream IN = New BufferedInputStream (jar.getinputstream (entry);
OutputStream out = new bufferedoutputstream (new fileoutputstream (es);
BYTE [] Buffer = New byte [2048];
For (;;) {
INT nbytes = in.read (buffer);
IF (nbytes <= 0) Break;
Out.write (buffer, 0, nbytes);
}
Out.flush ();
Out.close ();
In.Close ();
}
Catch (Exception E) {
E.PrintStackTrace ();
}
}
Public static void main (string args []) {
New extractfromjar (). ExtractMydbfromjar (".");
}
}
Run, test
Java -jar mydb.jar
