Try something like this (without third party GIF/JPEG coders/decoders):
import java.io.IOException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
import java.awt.image.BufferedImage;
import java.awt.Graphics;
import java.awt.Color;
import java.awt.Font;
public class MyJpeg extends HttpServlet
{
////////////////////////////////////////////////////////////////////////////
//////////////
public void doGet( HttpServletRequest request, HttpServletResponse
response )
throws IOException
{
BufferedImage bi = new BufferedImage( 255, 255,
BufferedImage.TYPE_INT_RGB );
Graphics g = bi.getGraphics();
for( int u = 0; u < 255; u++ )
{
g.setColor( new Color( u, 128, 255-u ) );
g.drawLine( 0, u, 255, u );
}
g.setFont( new Font( "arial", 0, 50 ) );
g.setColor( Color.red );
g.drawString( "Hello world", 5, 50 );
g.setColor( Color.white );
g.drawString( "Hello world", 5, 100 );
g.setColor( Color.black );
g.drawString( "Hello world", 5, 150 );
g.setColor( Color.green );
g.drawString( "Hello world", 5, 200 );
response.setContentType( "image/jpeg" );
ServletOutputStream sos = response.getOutputStream();
JPEGImageEncoder je = JPEGCodec.createJPEGEncoder( sos );
je.encode( bi );
sos.close();
g.dispose();
}
}
.Dmitry.
> -----Original Message-----
> From: Aaron Porter [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, June 16, 1999 6:47 PM
> To: [EMAIL PROTECTED]
> Subject: Re: Drawing lines in images!
>
>
> You can use GifServlet. It's at
>
> http://www.metawerx.com.au/aaron.porter
>
> Aaron
>
> > -----Original Message-----
> > From: Groenescheij, Michel
> > [mailto:[EMAIL PROTECTED]]
> > Sent: Wednesday, June 16, 1999 12:27 AM
> > To: [EMAIL PROTECTED]
> > Subject: Drawing lines in images!
> >
> >
> > Hi all,
> >
> > I'd like to let my servlet produce an image in my browser,
> > which has been provided with multiple lines drawn on it.
> > One way I can think of is sending the coordinates of the lines
> > from the servlet to an applet, which then draws the lines on
> > the image. Does anyone know some better way to do this?
> > Is there any way to generate images directly in servlets?
> >
>
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