Re: Save gif file from the URL
mark wrote:
Hello,
I just want to save on disc a gif file taken from the internet (i.e.
save as logo.gif the image
http://www.google.com/intl/us_ALL/images/logo.gif ). Is it possible
without much effort (I have read about the extra & not free libraries
but I hope there is a simple way to do so (just read bytes and write
bytes - no modification).
Regards. Marko
Try this;
import java.net.*;
import java.io.*;
public class saveBinaryFile
{
public static void main (String args[])
{
try
{
URL root = new URL(args[0]);
saveBinaryFile(root);
}
catch (MalformedURLException e)
{
System.err.println(args[0] + " is not a URL I understand.");
}
}
public static void saveBinaryFile(URL u)
{
int bfr = 1;
try
{
URLConnection uc = u .openConnection();
String ct = uc.getContentType();
int cl = uc.getContentLength();
if (ct.startsWith("text/") || cl == -1 )
{
System.err.println("This is not a binary file.");
return;
}
InputStream theImage = uc.getInputStream();
byte[] b = new byte[cl];
int bytesread = 0;
int offset = 0;
while (bytesread >= 0)
{
bytesread = theImage.read(b, offset, bfr);
if (bytesread == -1) break;
offset += bytesread;
}
if (offset != cl)
{
System.err.println("Error: Only read " + offset + " bytes");
System.err.println("Expected " + cl + " bytes");
}
String theFile = u.getFile();
theFile =
theFile.substring(theFile.lastIndexOf('/') + 1);
FileOutputStream fout = new FileOutputStream(theFile);
fout.write(b);
}
catch (Exception e)
{
System.err.println(e);
}
return;
}
}
1. Compile the above.
2. On windows box make a anyname.bat file and paste the following.
REM *** Test of Google logo d/l ***
java saveBinaryFile "http://www.google.com/intl/us_ALL/images/logo.gif"
pause
3. Put both in the same directory.
4. Double click on the bat file.
The image file should be saved in the same directory as the compiled class