我这样做，并且效果很好：
BufferedImage awtImage = new BufferedImage(drawPanel.getWidth(), drawPanel.getHeight(), BufferedImage.TYPE_INT_RGB);Graphics g = awtImage.getGraphics();drawPanel.printAll(g);try{String caminhoImagem = System.getProperty("user.home") + "\temps\assinatura.jpg";FileOutputStream fos = new FileOutputStream(caminhoImagem);JPEGImageEnprerImpl j = new JPEGImageEnprerImpl(fos);j.enpre(awtImage);fos.close();} catch(e) {..... }就这些了:)谢谢大家:)
